Abstract: The invention relates to a process for preparing monoalkyl phosphonites of the formula I ##STR1## where R.sup.1 is (C.sub.1 -C.sub.16)-alkyl, cyclohexyl, cyclopentyl, or phenyl, each of which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy or dialkylamino groups andR.sup.2 is (C.sub.1 -C.sub.8)-alkyl, which comprises reacting dichlorophosphines of the formula (II)R.sup.1 --PCl.sub.2 (II)where R.sup.1 has the meaning given above, with alcohols of the formula (III)R.sup.2 OH (III)where R.sup.2 has the meaning given above, the molar ratio of dichlorophosphine/alcohol being 1:3 to 1:20, and then, as soon as the content of ionic chlorine in the reaction mixture is 50-75% of the theoretical total chlorine content of the reaction mixture, reacting the mixture with ammonia.

Abstract: A process for preparing 4-bromomethyl-3-methoxybenzoic esters of the formula ##STR1## entails the corresponding 4-methyl-3-methoxybenzoic esters being reacted in chlorobenzene or an ester as solvent with N-bromosuccinimide with exposure to light of wavelength 10.sup.-5 to 10.sup.-8 m at -10.degree. to 120.degree. C.

Abstract: A process for the preparation of alkyl arylphosphinites of the formula (I) ##STR1## in which R.sup.1 is (C.sub.1 -C.sub.16)-alkyl, cyclohexyl, cyclopentyl, arylwhich can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkoxy groupsR.sup.2 is aryl which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy groups, where R.sup.1 and R.sup.2 together with the phosphorous atom can also form a ring andR.sup.3 is (C.sub.1 -C.sub.4)-alkyl, which comprises reacting halo(aryl) phosphines of the formula (II) ##STR2## in which R.sup.1, R.sup.2 have the meaning given above and X is halogen, with ammonia-containing alcohols of the formula (III)R.sup.3 OH (III)in which R.sup.3 has the meaning given above.

Abstract: The invention relates to a process for the preparation of alkali metal salts of phosphonic acid monomethyl esters of the formula (I) ##STR1## in which R is (C.sub.1 -C.sub.14)-alkyl andMe is sodium or potassium,which comprises metering 20 to 50% strength alkali metal hydroxide solution, in a molar ratio of 1:1, into phosphonic acid dimethyl esters of the formula (II) ##STR2## optionally dissolved in water, the total amount of water from the alkali metal hydroxide solution and phosphonic acid dimethyl ester solution being not more than 100% by weight, based on the weight of alkali metal hydroxide and phosphonic acid dimethyl ester, at 90.degree. to 130.degree. C. and distilling off the methanol formed.

Abstract: The invention relates to a process for preparing 6-alkoxy-(6H)-dibenzo?c,e!?1,2!-oxaphosphorines of the formula (I) ##STR1## where R.sup.1 to R.sup.6 independently of one another are halogen, (C.sub.1 -C.sub.6)alkyl or (C.sub.1 -C.sub.6)alkoxy and R.sup.7 is (C.sub.1 -C.sub.8)alkyl, which comprises adding 6-halo-(6H)-dibenzo?c,e!?1,2!-oxaphosphorines of the formula (II) ##STR2## where R.sup.1 to R.sup.6 have the meaning specified above and X is halogen, to alcohols R.sup.7 OH, where R.sup.7 has the meaning given above, at temperatures of -30.degree. to +5.degree. C. and then introducing ammonia at this temperature.

Abstract: The invention relates to a process for preparing phosphorus-containing compounds of the formula I ##STR1## in which R.sup.1 and R.sup.2 are an alkyl radical having 1 to 8 carbon atoms, a cyclohexyl radical, a cyclopentyl radical, an aryl radical or a halogen-, alkyl- or alkoxy-substituted aryl radical, where R.sup.1 and R.sup.2 together with the phosphorus atom can also form a ring, n and m=0 or 1 and R.sup.3 and R.sup.4 are alkyl radicals having 1 to 4 carbon atoms or n=0, m=0 or 1 and R.sup.3 and R.sup.4 are H, by adding compounds of the formula II ##STR2## into dialkyl esters of fumaric acid or of maleic acid of the formula (III) or dialkyl esters of itaconic acid of the formula (IV) ##STR3## in which R.sup.3 and R.sup.4 have the meaning given above, and, optionally reacting an alkyl ester of a phosphorus-containing dicarboxylic acid of the formula (I), where n=0, with water in the presence of catalytic amounts of an acid to give the phosphorus-containing dicarboxylic acid.

Abstract: The present invention relates to sulfonated diphosphines of the formula (I) ##STR1## where M is hydrogen, ammonium, a monovalent metal or the equivalent of a polyvalent metal, a, b, c and d are each 0 or 1, with the proviso that a+b+c+d is an integer from 1 to 4, Ar is an m-(MSO.sub.3)--C.sub.6 H.sub.4 radical and M is as defined above, n is 0, 1 or 2, Ph is a phenyl radical, R.sup.1 and R.sup.2 are identical or different and are each an alkyl radical having from 1 to 10 carbon atoms or a cycloaliphatic radical having from 5 to 10 carbon atoms in the ring, and a process for their preparation.

Abstract: Aminomethanephosphonic acid and aminomethylphosphinic acids are interesting as biologically active compounds or as intermediates for the preparation of biologically active compounds. According to the invention, such compounds of the formula I ##STR1## in which R.sup.1 is OH, C.sub.1 -C.sub.4 -alkyl or phenyl, can be prepared in a technically simple manner by reacting compounds of the formula II ##STR2## in which R.sup.2 is H, C.sub.1 -C.sub.6 -alkyl, benzyl, phenyl, optionally substituted by C.sub.1 -C.sub.4 -alkyl, -alkoxy and/or halogen, and R.sup.1 is as defined above, with water, at 80.degree. to 300.degree. C.

Abstract: The invention relates to a process for the preparation of secondary phosphines of the formula (I) ##STR1## in which R.sup.1 to R.sup.6 independently of one another are hydrogen, halogen, (C.sub.1 -C.sub.6)-alkyl or (C.sub.1 -C.sub.6)-alkoxy, wherein secondary phosphine oxides of the formula (II) ##STR2## are reacted with Lewis acids as catalysts, at elevated temperature, and the secondary phosphines of the formula (I) formed are distilled off under reduced pressure.

Abstract: Epoxy resin mixtures for producing prepregs and composites that are available at low cost and can be processed well yield flame-retardant molding materials even without the addition of flame retardants, and these molding materials have a high glass transition temperature and also have an improved interlaminar adhesion and adhesion to copper when they contain the following components:a phosphorus-modified epoxy resin with an epoxy value of 0.02 to 1 mol/100 g, composed of structural units derived from(A) polyepoxy compounds with at least two epoxy groups per molecule and(B) at least one compound from the group consisting of phosphinic acids, phosphonic acids, pyrophosphonic acids and phosphonic acid half-esters, andan aromatic polyamine as the hardener.

Abstract: The present invention relates to phosphorus-modified epoxy resins having an epoxide value of 0 to about 1 mol/100 g containing structural units which are derived from(A) polyepoxide compounds having at least two epoxide groups per molecule and(B) phosphinic and/or phosphonic acid anhydrides, wherein at least one phenolic antioxidant is admixed to them. The phosphorus-modified epoxy resins stabilized in this way are distinguished by an increased storage stability, in particular at higher temperatures.The invention furthermore relates to the use of these stabilized, phosphorus-modified epoxy resins for the production of shaped articles, coatings or laminates.

Abstract: The invention relates to novel 2,2'-bis [bis(aryl)phosphinomethyl]-1,1'-binaphthyls of the formula ##STR1## in which Ar.sup.2 is a phenyl radical, R' is an alkyl radical having 1 to 4 carbon atoms, CF.sub.3, fluorine, chlorine or bromine, and n is 1 or 2.

Abstract: Epoxy resin mixtures for producing prepregs and composites that are available at low cost and can be processed well yield flame-retardant molding materials even without the addition of flame retardants, and these molding materials have a high glass transition temperature and also have an improved interlaminar adhesion and adhesion to copper when they contain the following components:a phosphorus-modified epoxy resin with an epoxy value of 0.02 to 1 mol/100 g, composed of structural units derived from(A) polyepoxy compounds with at least two epoxy groups per molecule and(B) phosphinic acid anhydrides and/or phosphonic acid anhydrides, andan aromatic polyamine as the hardener.

Abstract: In the preparation of 1,1'-binaphthyls substituted in the 2,2'-positions (and optionally substituted in one or more of positions 3 to 7 and/or 3' to 7'), a 1-halo-2-substituted naphthalene is reacted with a 2-substituted-1-naphthyl-magnesium halide in the presence of a catalyst. The catalyst comprises palladium and a phosphine ligand. Typical phosphine ligands include triphenylphosphine, 1,4-bis(diphenylphosphino)butane, 2,2'-bis(diphenylphosphinomethoxy)-1,1'-binaphthyl, and tetrakis(triphonylphosphine).

Abstract: The present invention relates to a process for preparing 2,2'-bis(halomethyl)-1,1'-binaphthyl, by reacting 2,2'-dimethyl-1,1'-binaphthyl in the presence of a solvent with a halogenating agent under the action of light having a wavelength of from 10.sup.-5 to 10.sup.-8 m in the presence or absence of a free-radical former at from -10.degree. to 120.degree. C.

Abstract: The present invention relates to a process for the preparation of compounds of the general formula I ##STR1## in which R.sup.1 and R.sup.2 are defined as stated in claim 1, characterized in that a 1,1,1-tris(hydroxymethyl)-(C.sub.2 -C.sub.5)-alkane or 2,2-bis(hydroxymethyl)-1,3-propanediol is reacted with vinylphosphonic anhydride.

Abstract: The present invention relates to phosphorus compounds of the formula ##STR1## in the (RS), (R) and (S) forms, in which Ar.sup.1 --Ar.sup.1 is a bipheny1 radical, 1-phenylnaphthyl radical or 1,1'-binaphthyl radical, each R', if present, independently of the others, is F, an alkyl or alkoxy radical each having 1 to 8 carbon atoms, m is an integer from 0 to 4, k is an integer from I to 4, Ar.sup.2 is a phenyl radical, each R", if present, is, independently of the others, F, Cl, CF.sub.3, SO.sub.3 H, SO.sub.3, SO.sub.3 Me (Me is Li, Na, K), a dialkylamino radical having 2 to 8 carbon atoms, an alkyl or alkoxy radical each having 1 to 8 carbon atoms and n is an integer from 0 to 5, and to a process for their preparation.

Abstract: Monoalkyl monoaryl arylphosphonites of the formula (I); ##STR1## in which R.sub.1 is the radical ##STR2## in which R' is identical or different and is (.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy, (C.sub.1 -C.sub.6)-alkylthio, or halogen, and n is an integer from 0 to 3, or is the naphthyl radical which can bear 1 to 3 substituents R';R.sub.2 is a (C.sub.1 -C.sub.6)-alkyl radical, andR.sub.3 is as R.sub.1, where R.sub.1 and R.sub.2 can be identical or different with respect to one another; is described.

Abstract: Described are low-pill, low-flammability linear fiber-forming polyesters formed from dicarboxylic acid and diol components, which polyesters contain in their polymer chain modifying units formed by esterification or transesterification from compounds of the formulae I and/or II and/or III ##STR1## where R.sup.1 and R.sup.2 are identical or different and each is a univalent aliphatic, araliphatic or aromatic hydrocarbon radical having 1 to 12 carbon atoms, orR.sup.1 and R.sup.2 are together a bivalent aliphatic, araliphatic or aromatic radical,R.sup.3 is an (n+1)-valent organic radical,A is a group capable of ester formation, n is an integer from 1 to 3,R.sup.4 and R.sup.5 are identical or different and each is hydrogen or a univalent aliphatic, araliphatic or aromatic hydrocarbon radical having 1 to 12 carbon atoms,y is an integer from 1 to 10,R.sup.

Abstract: A process for the preparation of N-phosphonomethylglycine by reaction of aminomethanephosphonic acid and glyoxylic acid in the molar ratio 1:2 in aqueous medium.