Preparation of cis—olefins
    9.
    发明授权
    Preparation of cis—olefins 失效
    顺式烯烃的制备

    公开(公告)号:US06333441B1

    公开(公告)日:2001-12-25

    申请号:US08026681

    申请日:1993-03-04

    IPC分类号: C07C505

    摘要: A cis-olefin of the formula: R1—CH═CH—R2 is prepared by reducing an alkyne of the formula: R1—C≡C—R2 with formic acid in the presence of a palladium catalyst. R1 and R2 are independently selected from the group consisting of a hydrogen atom, ester group, substituted silyl group, carboxyl group, cyano group, aliphatic C1-C20 hydrocarbon group, and phenyl group. The cis-olefin which is a useful intermediate for the synthesis of fine chemicals is selectively produced in high yields.

    摘要翻译: 通过在钯催化剂存在下用甲酸还原具有下式的R 1 -C = C-R 2的炔来制备下式的顺式烯烃:R1-CH = CH-R2。 R1和R2独立地选自氢原子,酯基,取代的甲硅烷基,羧基,氰基,脂族C1-C20烃基和苯基。 作为合成精细化学品的有用中间体的顺式烯烃以高产率选择性地生产。

    Catalytic composition for the hydrogenation of olefinically unsaturated organic compounds
    10.
    发明授权
    Catalytic composition for the hydrogenation of olefinically unsaturated organic compounds 有权
    用于烯属不饱和有机化合物氢化的催化组合物

    公开(公告)号:US06281397B1

    公开(公告)日:2001-08-28

    申请号:US09235378

    申请日:1999-01-22

    IPC分类号: C07C1300

    摘要: A catalytic composition effective in the selective hydrogenation of olefinic double bonds, comprising the reaction product between: (A) at least one complex of a transition metal having the following general formula (I): M(R1)(R2)(R3)(R4)  (I)  wherein: M is selected from titanium and zirconium, preferably titanium; each of the radicals R1, R2, R3 or R4, independently, represents an organic or inorganic group of an anionic nature &sgr;-bound to M, on the condition that at least one, and preferablyat at least two, of these radicals is an organic group; and (B) at least one organometallic compound of magnesium having the following formula (II): Mg(R5)n(R6)(2−n)  (II)  wherein: R5 or R6 each independently represent an aliphatic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and “n” is a decimal number between 0 and 2.0. Said catalytic composition advantageously and selectively promotes the direct hydrogenation of double bonds of an olefinic type, with high rates and with a reduced formation of isomers.

    摘要翻译: 包括有效地选择性氢化烯属双键的催化组合物,其包含以下反应产物:(A)至少一种具有以下通式(I)的过渡金属络合物:其中:M选自钛和锆,优选 钛;每个基团R 1,R 2,R 3或R 4独立地表示与M结合的阴离子性质的有机或无机基团,条件是这些基团中至少一个,优选至少两个是这些基团 有机团体 和(B)至少一种具有下式(II)的镁的有机金属化合物:其中:R 5或R 6各自独立地表示具有1至20个碳原子的脂族或芳族烃基,“n”是 0和2.0。所述催化剂组合物有利且选择性地促进烯烃型双键的直接氢化,具有高速率和减少的异构体形成。