Abstract: A method of preparing pure 3-butenyl triorgano oxysilanes, the intermediate products 3,4-dichlorobutyl triorgano oxysilanes and the use of the final products in rubber mixtures reinforced with silicic acid and vulcanizable with peroxides. 3,4-dichlorobutene-1 and trichlorosilane are used as initial products.

Abstract: The present invention relates to a process for the production of mixtures of novel organofunctional alkoxysilanes by the reaction of mixtures of certain substituted organic halides and chlorosilanes with molten sodium dispersed in alkoxysilanes. In the described process, the substituted organic groups of the organic halide replace alkoxy groups of the alkoxysilanes. Also claimed, are organofunctional alkoxysilanes prepared by the claimed process.

Abstract: A polyorganosiloxane compound is provided which has a fluorine-containing group at its .alpha.-position and one or more than one hydrosilyl group at its .omega.-position, has a fluorine-containing group located at least at its .alpha.- and .alpha.'-position and one or more than one hydrosilyl group at its .omega.-position or has a fluorine-containing group at least at its .alpha.-, .alpha.'- and .alpha."-position and one or more than one hydrosilyl group at its .omega.-position.

Abstract: Chemically reactive fluorinated organosilicon compounds as described for use as, e.g., lubricants, sealants and elastomers, are described corresponding to the formulaeX.sub.2 R.sup.1.sub.2 Si IorXR.sup.2.sub.2 Si(R.sup.3 SiR.sup.2.sub.2).sub.z X IIwhere X a represents a reactive group selected from a halogen, hydroxyl, alkoxy, acetoxy, amino, alkyl amino or dialkyl amino, z is from 1 to 5, inclusive, at least one of the R.sup.1 radicals and at least one of the R.sup.

Abstract: Perfluoroalkyl group containing organopolysiloxanes having a high degree of polymerization can be prepared by reacting a liquid organopolysiloxane of formula (I): R.sup.1.sub.aR.sup.2.sub.b (OH).sub.c SiO.sub.[4.(a+b+c)]/2 with an alkali metal hydroxide to form an alkali metal silanolate; reacting the alkali metal silanolate with a perfluoroalkyl group-containing organosilane of formula (II): RfR.sup.3 SiX.sub.2 to synthesize a perfluoroalkyl group-containing organopolysiloxane intermediate of formula (III): [(R.sup.1.sub.a R.sup.2.sub.b SiO).sub.m (RfR.sup.3 SiO)].sub.n ; and polymerizing the intermediate of formula (III) or a mixture of the intermediate and an organopolysiloxane of formula (IV): R.sup.5.sub.e R.sup.6.sub.g SiO.sub.[(4.(e+g)]/2 in the presence of a strongly acidic catalyst or strongly basic catalyst.

Abstract: A process is described for the improved synthesis of the optically pure C.sub.10 -C.sub.24 fragment of the macrolide structure of the immunosuppressant FK-506. This compound is also useful as an intermediate for preparing FK-506 derivatives.

Abstract: A terminal perfluoroalkylsilane compound F(CF.sub.2).sub.m (CH.sub.2).sub.n Si(CH.sub.3).sub.p X.sub.3-p (m+n=10 to 32 carbon atoms in fluoroalkyl group) is prepared by a hydrosilylation reaction of a terminal perfluoroalkene compounds F(CF.sub.2).sub.m (CH.sub.2).sub.1+q CH.dbd.CH.sub.2 (1+q+2=n) with the hydrodiensilane HSi(CH.sub.3).sub.p X.sup.3.sub.3-p. The F(CF.sub.2).sub.m (CH.sub.2).sub.1+q CH.dbd.CH.sub.2 are synthesized by a Grignard's reaction of a Grignard's reagent X.sup.2 Mg(CH.sub.2).sub.q CH.dbd.CH.sub.2 obtained from a terminal alkenyl halogen compound X.sup.2 (CH.sub.2).sub.q CH.dbd.CH.sub.2 with a terminal fluoroalkyl halogen compound F(CF.sub.2).sub.m (CH.sub.2).sub.1 X.sup.1.The terminal perfluoroalkylsilane compound has a sufficient lubricating effect and is useful for a coating agent with long and continuous lubricity.

Abstract: A process for the synthesis of alpha,alpha-difluoroketones from alpha,alpha-difluoroacylsilanes and intermediates therefor.

Abstract: A bisindenyl derivate of the formula I ##STR1## (M.sup.1 =Si or Ge, R.sup.6 and R.sup.7 =unsubstituted or substituted idenyl radical)is obtained in very good yield by reacting a compound of the formula II ##STR2## (X=halogen) with a compound of the formula III or IVR.sup.6 -M.sup.2 (III) R.sup.7 -M.sup.2 (IV)(M.sup.2 =alkali metal)if, in the reaction, compound III or IV is added slowly to compound II.Compound I is suitable as a starting material for the preparation of metallocene catalyst components.

Abstract: A process for the preparation of perfluoroalkyl compounds which comprises reacting a perfluoroalkyl-trimethylsilane of the general formula (CH.sub.3).sub.3 Si-C.sub.n F.sub.2n+1 (I), wherein the group C.sub.n F.sub.2n+1 represents a perfluoroalkyl group having from 1 to 6 carbon atoms, with a carbonyl compound of the general formula F.sup.1 --CO--R.sup.2 (II), wherein R.sup.1 represents a hydrocarbon group or hydrogen and R.sup.2 represents a hydrocarbon group, a perfluoroalkyl group or a perfluoroaryl group, but wherein R.sup.1 and R.sup.2 together may also be part of an alicyclic ring system, in the presence of a salt-like fluoride--which is at least partially soluble in the reaction medium--as a catalyst to yield a silylether of the formula ##STR1## and isolating this compound or hydrolyzing it to yield an alcohol of the formula IV ##STR2## The invention also relates to pentafluoroethyl trimethylsilane (CH.sub.3).sub.3 Si--CF.sub.2 CF.sub.3 and a process for the preparation of this compound.

Abstract: Propanol derivatives of formula (I) wherein X is a leaving group; R.sub.1 is H or a protecting group; and R.sub.2 is H, and R.sub.3 is a group--CH.sub.2 Y wherein Y is a leaving group; or R.sub.2 and R.sub.3 together form .dbd.CH.sub.2. The propanol derivatives of the formula (I) are useful as multifunctional alkylating agents.

Abstract: A silicon compound represented by formula (I): ##STR1## wherein either one of R.sup.1 and R.sup.2 represents a vinyl group with the other representing a hydrogen atom; either one of R.sup.3 and R.sup.4 represents a vinyl group with the other representing a hydrogen atom; and R.sup.5, R.sup.6, and R.sup.7, which may be the same or different, each represents a substituted or unsubstituted monovalent hydrocarbon group, an alkoxy group or a halogen atom. The compound exhibits improved compatibility with polymerizable monomers or organic polymers and is useful as a crosslinking agent or modifier.

Abstract: There are disclosed novel substituted o-phthalaldehydes of formula I ##STR1## wherein at least one of the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4 is Q(alkyl).sub.3, --CH.sub.2 --Q(alkyl).sub.3, --O--Q(alkyl).sub.3, --Q(aryl).sub.3 or --Q(alkylenearyl).sub.3, wherein Q is Si, Sn or Ge, the alkyl moieties contain 1 to 12 carbon atoms, the aryl groups contain 6 or 12 ring carbon atoms and the alkylene radicals contain 1 to 4 carbon atoms, and each of the remaining substituents R.sub.1 to R.sub.4 is a hydrogen or halogen atom or a cyano, nitro, carboxyl or hydroxyl group, a C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio or an alkoxycarbonyl group containing 1 to 4 carbon atoms in the alkoxy moiety.The novel o-phthalaldehydes can be polymerized to give polymers that can be used as photoresists.

Abstract: A method for purifying alkoxysilane with the general formula, R.sub.m Si(OR.sup.1).sub.4-m. The method significantly lowers the level of non-hydrolyzable chlorine-based impurities, as well as the level of hydrolyzable chlorine-based impurities. The method comprises: (i) heating the alkoxysilane in the presence of a treating agent selected from a group which consists of acid clays and metal halides; (ii) contacting the alkoxysilane with a neutralization agent; and (iii) separating the alkoxysilane from the unused neutralization agent and by-products of neutralization.

Abstract: There are prepared silafluoroolefins and silafluoroolefin ethers and polymers thereof by reacting carbon with silicon tetrafluoroide and a source of hydrogen followed by polymerization. The polymers are useful for architectural purposes and as release coatings.

Abstract: A class of novel organosilane compounds are disclosed as represented by the general formulaRSi(OCH.sub.2 CF.sub.3).sub.3,in which R is an atom or group selected from the class consisting of a hydrogen atom, unsaturated monovalent aliphatic hydrocarbon groups having from 2 to 20 carbon atoms, monovalent aryl groups and monovalent organic groups having from 3 to 20 carbon atoms and containing at least one hetero atom, i.e. an atom other than carbon and hydrogen atoms, such as oxygen, halogens, sulfur and nitrogen, the said hetero atom-containing organic group being bonded to the silicon atom through a carbon-to-silicon linkage. Several particular compounds belonging to the class were synthesized and identified.

Abstract: Derivatives of diphenylhexafluoropropane having the formula: ##STR1## where R is an unsubstituted or substituted alkylene, an epoxy, a silyl or alkoxysilyl group; and where X and Y are hydrogen or halogen. The derivatives are useful in formulating polymer structures.

Abstract: The self-emulsifiable silicone composition of the invention comprises (a) an organopolysiloxane having polyoxyalkylene moieties and perfluoroalkyl-containing organic groups and represented by the average unit formula ##STR1## in which R is hydrogen atom or a monovalent hydrocarbon group having from 1 to 6 carbon atoms, G is polyoxyalkylene residue represented by the general formula ##STR2## and (b) an organopolysiloxane having perfluoroalkyl-containing organic groups represented by the average unit formula ##STR3## The composition is useful as an antifoam agent and, despite the high self-emulsifiability and stability, exhibits excellent defoaming activity even at relatively low temperatures around room temperature in contrast to conventional silicone-based antifoam compositions.

Abstract: Silicon-containing imidazoles having broad-spectrum fungicidal activity have been discovered.

Abstract: The invention provides a novel diorganopolysiloxane compound composed of dimethysiloxane units, methyl (2-perfluoroalkylethyl)siloxane units and methyl acyloxyalkylsiloxane units. The novel diorganopolysiloxane compounds of the invention have excellent lubricating properties so that they are useful as an additive ingredient in various materials such as coating compositions, magnetic layer of recording tapes and the like where lubricity or mold releasability is essential.

Abstract: Polyalkoxysilylenolethers, for example, methyldimethoxyisopropenoxysilane, are provided and a method for making such silanes. The dialkoxysilylenolethers can be used as end-capping silanes for making noncorrosive RTV compositions.

Abstract: Novel C15 cyclobutyl analogs or derivatives of prostaglandins of the E-, A- and F-classes are useful modifiers of smooth muscle activity. The compounds have valuable pharmacological properties such as platelet antiaggregating agents, gastric antisecretory agents and brochodilating agents.

Abstract: This disclosure describes novel 15-deoxy-16 hydroxy-16-substituted prostanoic acid analogs in which the C-1 carboxyl is replaced by a primary alcohol and carboxylic acid esters, carbonates and carbomates thereof. The prostanoic carbinols and carboxylic acid esters thereof described herein have utility as bronchodilators as hypotensive agents, and as agents for the control of excessive gastric secretion.

Abstract: This disclosure describes derivatives, analogs, and congeners of prostanoic acid having a terminal cyclic moiety in the .beta.-chain which possess the pharmacological activities associated with the prostaglandins.

Abstract: Derivatives, analogs, and congeners of prostane having a 1-(hydroxymethyl)-1-oxo-prostane structure in the F.sub.1 series.