Abstract: .beta.-Aminothiol ester having the general formula (I): ##STR1## which is useful as an intermediate in the preparation of carbapenen beta-lactam antiobiotics, wherein R.sup.1 is alkyl or aryl and R.sup.2 and R.sup.3 are protective groups. The .beta.-Aminothiol ester of formula (I) is prepared by reacting a .beta.-hydroxythiol ester having the general formula (III): ##STR2## wherein R.sup.1 is as above, with a boron compound having the general formula (IV): ##STR3## wherein each of R and R' is alkyl or cycloalkyl, or R and R' taken together, form a ring including the boron atom in the presence of a tertiary amine, the obtained reaction mixture being reacted with an imine having the general formula (V): ##STR4## Wherein R.sup.2 and R.sup.3 are protective groups, followed by treating the resultant product with hydrogen peroxide.

Abstract: A method for preparing preceramic polymers is disclosed. This method includes the steps of(1) reacting in solution anhydrous ammonia with a mixture of R.sup.1 SiHX.sub.2 (where R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, and X is a halogen) and RSiX.sub.

Abstract: A buffer and silicone/silicate-containing antifreeze concentrate characterized by storage stability and minimized corrosiveness toward metals when diluted to make an antifreeze.

Abstract: A method of preparing silazane polymers, with 3 or more repeating units, of the general formula--((CH.sub.3).sub.2 N).sub.e Si(R).sub.a (R'HN).sub.f H.sub.c (NR').sub.g --and a (CH.sub.3).sub.2 NH byproduct group where R is hydrogen, an alkyl group having 1-6 carbon atoms or an aryl group having 6-12 carbon atoms, a=0, or 1, b=2-4, C=0-2, d=0 or 1, e=0-2, f=0-2, g=1-3 and a+c+e+f+g=4 for the polymer units; and R' is hydrogen or methyl, whereby the silazane polymer is substantially free of halide impurities, and wherein this method comprises:transaminating an aminosilane of the general formula (R).sub.a ((CH.sub.3).sub.2 N).sub.b H.sub.c S; where R is defined as above and a+b+c=4 with an amine of the general formula (CH.sub.3).sub.d NH.sub.3-d whereby d is defined as above and the amine has a molecular weight lower than 45 all in the presence of an acid catalyst or the ammonium salt of the acid and thereafter condensing to form the polymer.

Abstract: Novel room temperature vulcanizable polydiorganosiloxane compositions comprising an .alpha.,.omega.-dihydroxypolydiorganosiloxane and a poly-(alkoxysilylalkyl)amine. These compositions are neutral cure, exhibit excellent shelf life stability, possess a practically controllable cure rate and upon curing produce elastomers which have good adhesion to building materials and which possess good weatherability.

Abstract: This invention relates to amine derivatives and salts thereof. These compounds have an anti-ulcer activity which is effective to human beings and animals. This disclosure relates to such compounds, a process for the preparation thereof and an anti-ulcer agent containing the same.

Abstract: Aminofunctional organopolysiloxane fluids are prepared by reacting a hydroxy-terminated organopolysiloxane fluid and an aminofunctional organopolysiloxane fluid in the presence of organo-metallic salt catalyst.

Abstract: A nitrogen-containing organosilicon compound represented by the general formula:(Y.sub.a R.sup.1.sub.3-a Si)bNHR.sup.2.sub.2-bwherein R.sup.1 stands for a saturated or unsaturated monovalent hydrocarbon group of 1 to 8 carbon atoms, R.sup.2 for a saturated or unsaturated monovalent hydrocarbon group of 1 to 6 carbon atoms, Y for ##STR1## a for an integer of the value of 1 to 3, and b for an integer of the value of 1 to 2.

Abstract: The invention provides novel silyl reagents of Formula IR.sup.b R.sup.c R.sup.d SiNCYwherein R.sup.b is a branched chain alkyl of 3-10 carbon atoms, cycloalkyl of 4-8 carbon atoms or branched chain aralkyl of 8-12 carbon atoms and R.sup.c and R.sup.d are selected from alkyl of 1-10 carbon atoms, cycloalkyl of 4-8 carbon atoms, aralkyl of 7-12 carbon atoms or aryl with the proviso that R.sup.c and R.sup.d are not the same group as R.sup.b, and Y is oxygen or sulphur. A further novel compound tri-isopropylsilyl isothiocyanate is also included. These silyl reagents are useful in preparing tetrahydroquinoline 8-nitriles, amides and thioamides as described in Ser. No. 506,279.

Abstract: The invention concerns novel compounds of formula IIIAR.sub.x.sup.a Si(NCS).sub.4-x IIIAwherein R.sup.a is selected from electron donating substituents consisting of alkoxy of 1-10 carbon atoms, cycloalkoxy of 4-8 carbon atoms, aralkoxy of 7-12 carbon atoms, phenoxy which may be substituted by alkyl of 1-10 carbon atoms, alkoxy of 1-10 carbon atoms or trifluoromethyl, the group R.sup.b R.sup.c N-wherein R.sup.b and R.sup.c are selected from alkyl of 1-6 carbon atoms, cycloalkyl of 4-6 carbon atoms, phenyl which may be substituted by alkyl of 1-10 carbon atoms, alkoxy of 1-10 carbon atoms or trifluoromethyl, and aralkyl of 7-12 carbon atoms or R.sup.b and R.sup.

Abstract: Convenient intermediates for preparing 3-substituted-2-hydroxypropyl aryl ether .beta.-blockers, a reaction to the intermediates of the following formula and a conversion to obtain the said .beta.-blockers are disclosed. ##STR1## (wherein X is hydrogen or halogen; Y is halogen, hydroxy, lower acyloxy, amino, lower alkylamino, lower aralkylamino, lower acylamino, di-lower alkylamino, lower alkyleneamino, N-lower alkyl-N-lower aralkylamino, di-lower acylamino, N-lower alkyl-N-lower acylamino or N-tri-lower alkylsilylamino;one of P and R combined together with Q represents lower alkylene or alkenylene optionally interrupted by O, N or S and optionally substituted by lower alkyl, lower aralkyl, lower carboxylic acyl, carboxy, protected carboxy; hydroxy, lower alkoxy, lower acyloxy, oxo; amino, lower alkylamino, lower acylamino, nitro, nitroso, lower alkylthio, lower sulfonic acyl or halogen;and the remaining R or P is hydrogen or halogen;and dotted line represents the presence of one or two double bonds).

Abstract: Olefinic silazanes are prepared by the reaction of an olefinic amine such as allylamine with a silazane such as dimethylaminodimethylsilane or tetramethyldisilazane, preferably in the presence of a catalytic amount of a hydrogen halide source such as dimethylchlorosilane as catalyst. The highly volatile amino compound generated as a by-product (e.g., ammonia or dimethylamine) is lost by volatilization and this furnishes at least part of the driving force for the reaction.

Abstract: A novel organosilicon compound represented by a formula ##STR1## wherein A is methylene, carbonyl or sulfonyl group; R, R.sub.1 and R.sub.2 are alkyl group, respectively; R.sub.3 is alkyl, substituted alkyl, alkenyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, pyridyl, substituted pyridyl, furyl, substituted furyl, thienyl, substituted thienyl group or cycloalkyl group together with the substituent A; R.sub.4 is hydrogen, alkyl or alkenyl group; and R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 are hydrogen, alkyl or substituted alkyl, respectively,a non-toxic salt thereof, a process for the preparation of said compound or salt, as well as an antitumor agent comprising as an effective agent at least one of said compound and salt.

Abstract: A process for preparing vinylaminosilanes in which an aminosilane of the formula HSi(NRR').sub.x (R").sub.3-x is reacted with an alkyne of the formula R"'C.tbd.CH in which R and R" are each saturated or unsaturated aliphatic hydrocarbon radicals or an aromatic hydrocarbon radical, R' and R"' are the same or different and are each hydrogen or R and x is an integer from 1 to 3, in the presence of a platinum hydrosilation catalyst at reaction temperatures above about 180.degree. C.

Abstract: (CH.sub.3).sub.3 SiNSO is produced by the reaction of ((CH.sub.3).sub.3 Si).sub.2 NH with SO.sub.2. Also produced in the reaction are ((CH.sub.3).sub.3 Si).sub.2 O and a new solid compound [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ]. Both (CH.sub.3).sub.3 SiNSO and [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] have fluorescent properties. The reaction of the subject invention is used in a method of measuring the concentration of SO.sub.2 pollutants in gases. By the method, a sample of gas is bubbled through a solution of ((CH.sub.3).sub.3 Si).sub.2 NH, whereby any SO.sub.2 present in the gas will react to produce the two fluorescent products. The measured fluorescence of these products can then be used to calculate the concentration of SO.sub.2 in the original gas sample. The solid product [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] may be used as a standard in solid state NMR spectroscopy, wherein the resonance peaks of either .sup.1 H, .sup.13 C, .sup.15 N, or .sup.29 Si may be used as a reference.

Abstract: (CH.sub.3).sub.3 SiNSO is produced by the reaction of ((CH.sub.3).sub.3 Si).sub.2 NH with SO.sub.2. Also produced in the reaction are ((CH.sub.3).sub.3 Si).sub.2 O and a new solid compound [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ]. Both (CH.sub.3).sub.3 SiNSO and [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] have fluorescent properties. The reaction of the subject invention is used in a method of measuring the concentration of SO.sub.2 pollutants in gases. By the method, a sample of gas is bubbled through a solution of ((CH.sub.3).sub.3 Si).sub.2 NH, whereby any SO.sub.2 present in the gas will react to produce the two fluorescent products. The measured fluorescence of these products can then be used to calculate the concentration of SO.sub.2 in the original gas sample. The solid product [NH.sub.4][(CH.sub.3).sub.3 SiOSO.sub.2 ] may be used as a standard in solid state NMR spectroscopy.

Abstract: The preparation of pure mixed alkoxyaminosilanes is described corresponding to the general formula:R.sub.m Si(OR').sub.n (NR"R'").sub.pwherein:R is hydrogen, short chain alkyl or alkenyl or aryl;R" and R'" are separately either hydrogen, short chain alkyl or aryl, at least one being other than hydrogen;R' is short chain alkyl or aryl; andm, n and p are integers such that m+n+p=4 and n and p are at least one each.The obtained compounds are employed in endcapping of polysiloxanes having terminal silane groups.

Abstract: A preceramic polymer which is a polysilazane is described. It is made by reacting an organodihalosilane with ammonia to form an ammonolysis product, and treating the ammonolysis product with a basic catalyst capable of deprotonating an NH group that is adjacent to an SiH group to form said polymer. The polymer is preferrably further treated with an electrophilic reagent. These polymers are useful for making various ceramic products.

Abstract: A method of producing tris (N-methylamine) methylsilane, including the steps of forming and cooling a liquid solution of methylamine in an inert solvent and under an inert atmosphere at a temperature of about -30.degree. C. and slowly adding a quantity of methyltrichlorosilane while maintaining said temperature. The reaction mixture is then heated for about 60 minutes at a temperature of about 40.degree. C., followed by filtering the solid portion from the liquid portion. The liquid is distilled to remove the solvent, resulting in a high yield of tris (N-methylamine) methylsilane.

Abstract: A method is provided for making polyalkoxyaminosilanes by effecting reaction between polyalkoxysilane and amine in the presence of a transition metal catalyst. The polyalkoxyaminosilanes are intermediates for room temperature vulcanizable silicone compositions.

Abstract: [2-(p-t-Butylphenyl)ethyl]silanes are provided having the general formula:Si(B).sub.x (R).sub.y (A).sub.zwherein B is a (p-t-butylphenyl)ethyl moiety, R is an alkyl or aryl moiety and A is a hydrolyzeable moiety; x equals 1 or 2, y equals 0, 1 or 2 and z equals 1, 2 or 3 such that x plus y plus z equals 4. The bulky substituted silanes are produced by the hydrosilylation of p-t-butylstyrene.[2-(p-t-Butylphenyl)ethyl] substituted disiloxanes are also provided, having the general formula:(B).sub.x (R).sub.y (A).sub.z Si--O--Si(A).sub.z (R).sub.y (B).sub.xwherein B, R, A, x, y and z are as defined above except that z equals 0,1 or 2 and x plus y plus z equals 3. The bulky substituted disiloxanes are produced by the hydrolysis of above-described bulky substituted silanes.

Abstract: (CH.sub.3).sub.3 SiNSO is produced by the reaction of ((CH.sub.3).sub.3 Si).sub.2 NH with SO.sub.2. Also produced in the reaction are ((CH.sub.3).sub.3 Si).sub.2 O and a new solid compound [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ]. Both (CH.sub.3).sub.3 SiNSO and [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] have fluorescent properties. The reaction of the subject invention is used in a method of measuring the concentration of SO.sub.2 pollutants in gases. By the method, a sample of gas is bubbled through a solution of ((CH.sub.3).sub.3 Si).sub.2 NH, whereby any SO.sub.2 present in the gas will react to produce the two fluorescent products. The measured fluorescence of these products can then be used to calculate the concentration of SO.sub.2 in the original gas sample. The solid product [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] may be used as a standard in solid state NMR spectroscopy.

Abstract: A process for the preparation of a plastic organopolysiloxane composition which can be stored in the absence of water and which is convertable even at room temperature into rubber-elastic compositions by the action of water or atmospheric moisture, comprising mixing a hydroxyl-terminated poly-diorganopolysiloxane with about 0.1-15% by weight of the total mixture of a substance of the formulaR.sub.W RO.sub.Z Si[NR"'R'R.sub.n Si(OR).sub.3-n ].sub.4-mwhereinR is an alkyl radical having 1-4 C atoms,R' is a divalent alkylene radical having 1-6 C atoms or a unit of the formula --(CH.sub.2).sub.3 NH(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.2 --NH(CH.sub.2).sub.2 NH(CH.sub.2).sub.2 --,R"' is an alkyl radical having 1-4 C atoms, R.sub.W RO.sub.2 Si or hydrogen,n is 0, 1 or 2, andm=W+Z=0, 1, 2 or 3,or a partial hydrolysis product thereof as a crosslinking agent.

Abstract: Refrigeration fluid compositions for refrigeration and air-conditioning circuits include a usual refrigerant fluid together with a liquid, hydrolyzable organosilane which remains in the liquid phase throughout the air-conditioning circuit, and which is capable of removing moisture from the interior of the circuit and sealing leaks.

Abstract: A process for producing a silicon isocyanate compound which comprises reacting a silicon halide compound in which a fluoride compound is excluded with an isocyanate of the formula [I] M(NCO).sub.m or a cyanate of the formula [I'] M(OCN).sub.m wherein M represents a member selected from the group consisting of alkali metals and alkaline earth metals, and m is 1 or 2, in the presence of one or more reaction accelerators selected from the group consisting of alkylene glycols, polyalkylene glycols and, ether and ester derivatives thereof, thereby to prepare a silicon isocyanate compound containing at least one Si--NCO linkage.

Abstract: This invention relates to polymeric organosilicon compounds containing aryl radicals and to a method for improving the gliding or slipping properties of organic fibers treated therewith. The polymeric organosilicon compounds are represented by the formulaM.sub.a R.sub.b Si{[(OSiR.sub.2).sub.n D].sub.m (OSiR.sub.2).sub.n OSiR.sub.3-d M.sub.d }.sub.4-a-bin which R is hydrocarbon or substituted hydrocarbon radical, D represents radicals of the formula--X.sub.a A--X.sub.a (A--X.sub.a).sub.c --,X represents the groups: ##STR1## --NR'--, --O--, --S--, --SO.sub.2 --, --R"--, --NR'R", ##STR2## --OR"--, --SR"--, --SO.sub.2 R", where R' is hydrogen or R, R" is a bivalent aliphatic hydrocarbon radical, A is a bivalent or substituted bivalent aromatic hydrocarbon radical, M represents radicals of the formula--X.sub.a --A--X.sub.a (A--X.sub.a).sub.c H,a is 0 or 1, b is 0, 1 or 2, c is 0 or a number of from 1 to 5, m is 0 or a number of from 1 to 20, n is a number of from 1 to 1,000 with the proviso that at least one OSiP.

Abstract: Process for the preparation of reactive, couplable derivatives of the thyroid hormones 3,3',5-triiodothyronine (T.sub.3) and 3,3',5,5'-tetraiodothyronine (T.sub.4) by reaction with reactive carboxylic acid derivatives, which process comprises sylylating all the functional groups of the thyroid hormone by reaction with a reactive triorganosylyl derivative and then reacting the persylylated derivative of the thyroid hormone thus obtained with an activated carboxylic acid derivative.

Abstract: Compounds of the formula ##STR1## in which R.sup.1 is a mono-silicon-containing hydrocarbyl radical having up to 35 carbon atoms;each of R.sup.2 and R.sup.3 is, independently, a hydrogen atom or lower alkyl having from 1 to 3 carbon atoms;n is 0 or 1; andM is a hydrogen atom, an equivalent of a cation which forms a non-toxic, pharmaceutically acceptable salt, or a non-toxic pharmaceutically acceptable monovalent radical which is hydrolyzable or saponifiable to an alkali metal cation, eg sodium 4-(4,4-dimethyl-4-sila-tetradecylamino)-benzoate, are useful as pharmaceutical agents.

Abstract: This invention relates to a process for the preparation of silylisocyanates corresponding to the formula:R.sub.a Si(NCO).sub.b X.sub.cwhereinR denotes a hydrocarbon group,X denotes chlorine or bromine,a represents an integer of from 1 to 3,b represents an integer of from 1 to 3, andc represents an integer of from 0 to 2 and the sum of a+b+c=4.These silylisocyanates are produced by reacting halogen silanes corresponding to the formula:R.sub.a SiX.sub.b+cwith urea at atmospheric pressure in a polar solvent at a temperature of at least 100.degree. C.

Abstract: What is disclosed is a process for preparing R'.sub.3 SiNH-containing silazane polymers by contacting and reacting chlorine-containing disilanes with {R'.sub.3 Si}.sub.2 NH where R' is vinyl, hydrogen, an alkyl radical of 1-3 carbon atoms or the phenyl group. The silazane polymers are useful as chemical intermediates to produce silicon-containing chemical compounds. They are also useful in the formation of silicon carbide-containing ceramic materials.

Abstract: The new compounds represented by the formulas: ##STR1## in which R is a straight or branched chain alkyl group including alkyl groups of about 1-18 carbon atoms, aryl groups of about 6 to 14 carbon atoms, and the R's are the same or different. The alkyl or aryl R groups are preferably unsubstituted but may have inert substituents that are nonreactive to the highly reactive Mg-N bonds, preferred substituents being ether groups, tertiary amine groups, chloride and fluoride groups and combinations of these, R' is R or hydrogen, Y is R or --SiR'.sub.3, all R's are the same or different, all R' are the same or different and all Y are the same or different.

Abstract: 2-Oxazolidinone or N-substituted derivatives thereof are reacted with aromatic amine hydrochlorides at elevated temperatures to produce 1,2-ethanediamines.

Abstract: A chrysotile asbestos base material is mixed in water containing dissolved alum (aluminum sulphate) prior to addition of the organo-silane coating.

Abstract: Novel compounds of the formula ##STR1## are produced by reacting tris(dialkylamino)hydridosilanes with alkanols under specified conditions. The novel compounds are useful as analytical tools, as coupling agents, and in organic synthesis.

Abstract: Disclosed is 2 and a process for its preparation: ##STR1## It is useful in the synthesis of N-formimidoyl thienamycin; R.sup.2 is hydrogen or a protecting group.

Abstract: A composition comprising (a) an organic compound having at least one hydrolyzable silyl group and (b) an organic amine and/or an alkali metal hydroxide. The composition is curable upon exposure to moisture, and has superior properties, such as hardness, toughness and stain resistance, when used for example as a coating. The composition can be utilized as a coating material.

Abstract: Leaks in a vessel or pipeline or the like adapted for containing a fluid, are sealed by means of a volatilized polymerizable aminosilane supplied to the interior of the vessel under sufficient pressure and for a sufficient period of time to permit contact thereof and react in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.

Abstract: Disclosed is 2 and a process for its preparation: ##STR1## It is useful in the synthesis of N-formimidoyl thienamycin; R.sup.2 is hydrogen or a protecting group.

Abstract: The invention relates to a method for cross-linking radically cross-linkable polymers and for stabilizing such polymers against oxidative and/or thermal decomposition. The method is developed so that rapid and economical cross-linking of radically cross-linkable polymers is obtained in the presence of oxidation inhibitors without adverse effects on the cross-linking process due to the oxidation inhibitor. For this purpose, the invention provides that the cross-linking is carried out in the presence of oxidation inhibitors, wherein the inhibition-active --OH and/or --NH functions are at least partially substituted by protective silyl- and/or silylene groups, the inhibitor molecule containing at least one Si-alkenyl group. The method according to the invention is suitable for use with radical as well as radiation-cross-linkable polymer.

Abstract: Diallyl Phthalate compounds having a molecular weight of 250 to 20,000 and having at least one silyl group represented by the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each a hydrogen or a monovalent hydrocarbon radicals having 1 to 10 carbon atoms, such as alkyl, aryl or aralkyl radicals; X is a group selected from halogen, alkoxy, acryloxy, aminoxy, phenoxy, thioalkoxy and amino groups, and "a" is an integer 0, 1 or 2, in the molecule; and process for producing same wherein a diallyl phthalate monomer or prepolymer having molecular weight of 20,000 or less is reacted with a hydrosilane compound having the formula: ##STR2## wherein the designations are the same as above, and at a temperature within the range of 50.degree. to 150.degree. C.

Abstract: This invention is directed to an improved process for the preparation of condensable, film-forming organosilazanes by ammonolysis of organohalosilanes with liquid ammonia, the improvement comprising reacting a from about 5 to 15% by weight solution of organohalosilane in inert solvent with excess liquid ammonia under pressure at temperatures between 0.degree. and 50.degree. C.

Abstract: Process for preparing dimethylaminosilanes by reacting silicon with dimethylamine.

Abstract: A method for stabilizing organopolysiloxanes which are obtained from the condensation and/or equilibration of organosilicon compounds in the presence of phosphoronitrile chlorides which comprises treating the organopolysiloxanes with ammonia or an amine of the general formulaYHNC(CH.sub.3).sub.n (CH.sub.2 X).sub.3-nin which each X represents a hydrogen atom or a radical of the formulae --OCH.sub.3, --N(CH.sub.3).sub.2, --C(CH.sub.3).sub.3, --C(CH.sub.3).sub.2 NHY and --OC(CH.sub.3).sub.3 ; Y represents a hydrogen atom or a trimethylsilyl radical and n represents 0, 1, 2 or 3.