Process for the preparation of alcohols
    31.
    发明授权
    Process for the preparation of alcohols 失效
    醇的制备方法

    公开(公告)号:US6046127A

    公开(公告)日:2000-04-04

    申请号:US115738

    申请日:1998-07-15

    Applicant: Hubert Mimoun

    Inventor: Hubert Mimoun

    Abstract: Aldehydes, ketones, esters and lactones may be reduced using a reductant system consisting of a silane derivative and a metal hydride to give good yields of the corresponding alcohols. The reductant system used in the method enables preferential reduction of the carbonyl function. In one embodiment, the reductant system consists of polymethylhydroxysilane and a metal hydride, the hydride being prepared in situ or ex situ from a metal salt or complex by means of a reaction with a reducing agent.

    Abstract translation: 可以使用由硅烷衍生物和金属氢化物组成的还原剂体系来还原醛,酮,酯和内酯,以获得相应的醇的良好产率。 该方法中使用的还原剂体系能够优先降低羰基官能团。 在一个实施方案中,还原剂体系由聚甲基羟基硅烷和金属氢化物组成,氢化物通过与还原剂的反应由金属盐或络合物原位或非原位制备。

    Oxygen-containing aliphatic compounds and their use as intermediates for
the preparation of 4-hydroxy-2, 5-dimethyl-3(2H)-furanone
    33.
    发明授权
    Oxygen-containing aliphatic compounds and their use as intermediates for the preparation of 4-hydroxy-2, 5-dimethyl-3(2H)-furanone 失效
    含氧脂肪族化合物及其作为制备4-羟基-2,5-二甲基-3(2H) - 呋喃酮的中间体的用途

    公开(公告)号:US5580996A

    公开(公告)日:1996-12-03

    申请号:US416809

    申请日:1995-04-13

    CPC classification number: C07C49/175 C07C43/14 C07C45/28 C07C45/30 C07C45/40

    Abstract: The compounds of the invention are characterised by the formulae ##STR1## wherein index p represents an integer equal to 2 or 3 and q can take the value zero or 1, with the provision that p+q=3. Said compounds are obtained from hex-3-yne-2,5-diol following a process which comprises reacting an ethylenic compound of formula(CH.sub.3).sub.2 C.dbd.C(H).sub.n (CH.sub.3).sub.m (I)wherein index n represents an integer equal to 1 or 2 and m can take the values zero or 1 and wherein n+m=2, with hex-3-yne-2,5-diol, followed by the oxidation of the acetylenic ether obtained by means of ruthenium tetroxide. The compounds of formula (III) can be used as intermediate products for the preparation of 4-hydroxy-2,5-dimethyl-3(2H)-furanone (Furaneol.RTM.).

    Abstract translation: PCT No.PCT / IB94 / 00261 Sec。 371日期1995年04月13日 102(e)日期1995年4月13日PCT 1994年9月1日PCT PCT。 公开号WO95 / 07876 日期1995年3月23日本发明化合物的特征在于其中指数p表示等于2或3的整数,q可以取0或1的值与式 p + q = 3的规定。 所述化合物是通过使式(CH 3)2 C = C(H)n(CH 3)m(I)的烯属化合物反应的方法从己-3-炔-2,5-二醇获得,其中指数n表示整数 等于1或2,m可以取值为零或1,并且其中n + m = 2,与己-3-炔-2,5-二醇,然后氧化通过四氧化钌获得的炔属醚。 式(III)化合物可用作制备4-羟基-2,5-二甲基-3(2H) - 呋喃酮(Furaneol TM)的中间产物。

    Process for manufacturing methyl ketones by oxidation of terminal olefins
    36.
    发明授权
    Process for manufacturing methyl ketones by oxidation of terminal olefins 失效
    通过末端烯烃氧化制备甲基酮的方法

    公开(公告)号:US4379942A

    公开(公告)日:1983-04-12

    申请号:US265488

    申请日:1981-05-20

    CPC classification number: C07C45/28

    Abstract: Methyl ketones are prepared in liquid phase by oxidizing terminal olefins of the formula R--CH.dbd.Ch.sub.2, where R is a hydrocarbon radical. The oxidizing agent is hydrogen peroxide or an organic hydroperoxide, and the catalyst is a palladium catalyst of the formula Pd AA' whereA is fluoborate, acetate or trifluoroacetate, andA' is OOR.sub.1 and where R.sub.1 is a hydrocarbon radical.

    Abstract translation: 通过氧化式R-CH = Ch 2的末端烯烃,其中R是烃基,在液相中制备甲基酮。 氧化剂是过氧化氢或有机氢过氧化物,催化剂是式Pd AA'的钯催化剂,其中A是氟硼酸盐,乙酸盐或三氟乙酸盐,A'是OOR 1,其中R 1是烃基。

Patent Agency Ranking