Basf Aktiengesellschaft

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Friedrich Vogel

Axel Sanner

Joachim Paust

Hans-Helmut Goertz

Ferdinand Straub

Hans-Juergen Raubenheimer

Axel Nuerrenbach

Franz Frosch

Adolf Nuber

Alfred Oftring

Hansgeorg Ernst

Horst Westenfelder

Paul Naegele

Walter Trautmann

Dietrich Mass

Albrecht Kolb

Copolymers selectively hydrogenated on the olefinic double bond and composed of

Use of selectively hydrogenated styrene/butadiene copolymers in cosmetic

Copolymers of monoalkyl maleates and vinyl alkyl ethers are prepared by free radical copolymerization of maleic anhydride and a vinyl alkyl ether followed by reaction with an alkanol, by a process in which the vinyl alkyl ether component is present in excess in the reaction mixture in each phase of the polymerization, the free radical copolymerization is carried out in acetone and the acetone is removed by distillation during or after ester formation at up to 70.degree. C.

Preparation of copolymers of monoalkyl maleates and vinyl alkyl ethers

Polymers are obtained by polymerization of water-soluble monomers which contain one or more polymerizable olefinic double bonds and a quaternary nitrogen atom which is substituted by one or more hydroxyalkyl groups and are present in the form of halide-free salts, with or without further comonomers.

Polymers of oxyalkylated unsaturated quaternary ammonium salts, their

3-Methyl-1-vinylimidazolium chlorides are prepared by quaternizing N-vinylimidazoles in aqueous solution with methyl chloride and are used for the preparation of water-soluble homo- or copolymers.

Preparation of 3-methyl-1-vinylimidazolium chlorides

A terpolymer of acrylic acid, ethyl acrylate and N-tert-butylacrylamide is prepared by suspension polymerization.

Preparation of terpolymers

A terpolymer of vinylpyrolidone, tert-butyl (meth)acrylate and acrylic or methacrylic acid, its use in hair treatment agents, and hair cosmetics compositions which contain these agents.

Terpolymers, their use in hair treatment agents and hair treatment

Copolymers of vinylpyrrolidone, acrylamides which are monoalkylated or dialkylated on the N atom and alkyl or hydroxyalkyl esters of (meth)acrylic acid, with or without (meth)acrylic acid, or (meth)acrylic acid are used as and in hair fixatives.

Copolymers, use thereof as hair fixatives and hair fixatives containing

A process for the preparation of 1,3-disubstituted 4,5-cis-dicarboxy-2-imidazolidones useful as intermediates in the preparation of Vitamin H (biotin), said intermediates have the general formula ##STR1## in which R is an aliphatic hydrocarbon radical having 1 to 8 carbon atoms, an aralkyl radical or an aromatic hydrocarbon radical, preferably an allyl radical or a benzyl radical, comprising reacting a defined diaminosuccinic acid with phosgene in the presence of an alkali metal hydroxide.

Method for the preparation of 1,3-disubstituted

The invention relates to intermediate compounds having the general formula I ##STR1## in which R.sup.1 is H, an alkyl, arylalkyl or an aliphatic acyl radical, preferably a benzyl or acetyl group and wherein X and Y together span an additional bond between the X and Y carrying C atoms (Ia) or in which Y is OH and X is H (Ib) and in which the dotted line can represent an additional bond particularly

Magnesium chloride or phosphonium halide derivatives of

The invention relates to intermediate compounds having the general formula I ##STR1## in which R.sup.1 is H, an alkyl, arylalkyl or an aliphatic acyl radical, preferably a benzyl or acetyl group and wherein X and Y together span an additional bond between the X and Y carrying C atoms (Ia) or in which Y is OH and X is H (Ib) and in which the dotted line can represent an additional bond particularly [2R,1'Z,3'E,7'E]-6-benzyloxy-2,5,7,8-tetramethyl-2-(4',8',12'-trimethyl-tr ideca-1',3',7'-trien-1'-yl)chroman and 6-benzyloxy-2,5,7,8-tetramethyl-2-(1'-hydroxy-4',8',12'-trimethyl-trideca- 3',7'-diene-1'-yl)chroman, as well as compounds and methods of preparing compounds having the general formula II ##STR2## in which Z is one of the groups ##STR3## wherein R.sup.2 is an alkyl group with 1 to 4 carbon atoms preferably CH.sub.3 or C.sub.2 H.sub.5, particularly (3,7,11-trimethyl-trideca-2,6,10-trien-1-yl)triphenylphosphonium chloride and (3,7,11-trimethyl-trideca-2,6,10-trien-1-yl) phosphoric acid dimethylester as well as methods for the preparation of (2R,4'RS,8'RS)-.alpha.-tocopherol and (all-rac)-.alpha.-tocopherol via the new intermediate product.

Vitamin E intermediates and methods for the preparation of

(2R,6R)-1-Chloro-2,6,10-trimethyl-undecane I, (R)-(+)-.beta.-chloro-isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)-1-chloro-2,6-dimethyl-heptane V are novel optically active units for the synthesis of the side chain of (R,R,R)-.alpha.-tocopherol. In the process according to the invention, the optically active C.sub.14 -chloride I is obtained in 6 simple reaction steps starting from II, via the novel intermediates IV and V, in accordance with the following equation: ##STR1##

Optically active units for the synthesis of the side chain of

Chroman derivatives of the general formula I ##STR1## where A--B is --CH.sub.2 --CH.sub.2 --(Ia), --CH.dbd.CH--(Ib), --CHOH--CH.sub.2 --(Ic) or --CO--CH.sub.2 --(Id), R.sup.1 is --CH.sub.2 --O--R' or ##STR2## where R' is C.sub.1 -C.sub.4 -alkyl or arylmethyl and R' and R'' are each C.sub.1 -C.sub.4 -alkyl, which can also be bonded to form a five-membered or six-membered cyclic acetal, R.sup.2 is C.sub.1 -C.sub.4 -alkyl and R.sup.3 is H or a protective group.

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Wachenheim, Germany

Friedrich Vogel