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    Pyridine derivatives
    24.
    发明授权
    Pyridine derivatives 失效
    吡啶衍生物

    公开(公告)号：US3071561A

    公开(公告)日：1963-01-01

    申请号：US80992059

    申请日：1959-04-30

    Applicant: GEN ELECTRIC

    Inventor： BLUESTEIN BEN A

    IPC: C07F7/08 ,  C07F7/12 ,  C07F7/18 ,  C08G77/00 ,  C08G77/26

    CPC classification number: C07F7/1856 ,  C07F7/0854 ,  C07F7/12 ,  C08G77/00 ,  C08G77/26

    Abstract: A catalyst composition used for the preparation of beta-pyridylethyl silanes (see Group IV(a)) comprises (1) a cuprous halide or cuprous oxide, and (2) a polyamine of the formula (Y)(Y1)N(CH2)mN(Y1)2, where m is 1 to 6, Y is a C1-8 alkyl group, and Y1 is hydrogen, a C1-8 alkyl group, or an aminoalkyl, alkylaminoalkyl or dialkylaminoalkyl group. Examples of amines are N,N,N1,N1-tetramethyl- and tetraethyl-ethylene diamine, N,N,N1-trimethylethylene diamine, N,N,N1-trimethyldiethylene triamine and N-methylhexamethylene diamine.ALSO:The invention comprises beta-pyridylethyl silanes of the formula where X is a halogen atom or an alkoxy group of 1 to 8 carbon atoms, R is hydrogen or a C1-8 alkyl group, and R1 is a monovalent hydrocarbon or halogenated hydrocarbon group free from aliphatic unsaturation; and also comprises polysiloxanes derived therefrom. The silanes are prepared by reacting a silane HSi(R1)X2 with a vinyl pyridine in the presence of a catalyst composition comprising (1) a cuprous halide or oxide and (2) an amine of the formula (Y)(Y1)N(CH2)mN(Y1)2, where m is 1 to 6, Y is a C1-8 alkyl group, and Y1 is hydrogen, a C1-8 alkyl group, or an aminoalkyl, alkylaminoalkyl or dialkylaminoalkyl group. Examples of such amines are N,N,N1,N1-tetramethyl- and tetraethylethylene diamine, N,N,N1-trimethylethylene diamine, N,N,N1-trimethyldiethylene triamine and Nmethylhexamethylene diamine. A solvent may be present. When X is chlorine, the product may be reacted with ethyl orthoformate to substitute ethoxy groups, thus facilitating fractional distillation. The silanes may be converted to siloxane homo- or copolymers by conventional methods to form resins, gums, elastomers and chain-stopped fluids. Infusible resins may be prepared by curing with paint drier type catalysts. Elastomers are obtained from the gums by the use of fillers, e.g. silica, titania, alumina and carbon black, and cross linking agents, e.g. organo peroxides. The examples describe the preparation of (1) to (4) beta-pyridyl-2-ethyl methyl dichloro-, diethoxy-and dimethoxy-silanes and beta-pyridyl-4-ethyl methyl diethoxy silane; (5) a silicone fluid containing beta-pyridyl-2-ethyl methyl siloxane, dimethyl siloxane and trimethyl siloxane units; (6) an elastomer prepared from a beta-pyridyl-2-ethyl methyl siloxane gum, silica aerogel and benzoyl peroxide.

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