Method for the preparation of .alpha., .beta.-unsaturated ketones
    1.
    发明授权
    Method for the preparation of .alpha., .beta.-unsaturated ketones 失效
    制备(ALPHA),(BETA) - 饱和酮的方法

    公开(公告)号:US5214151A

    公开(公告)日:1993-05-25

    申请号:US730843

    申请日:1991-07-15

    摘要: The present invention relates to a method for the preparation of .alpha., .beta.-unsaturated ketones represented by general formula (II) ##STR1## (where R is a heterocyclic group with nitrogen atom in the ring or a phenyl group with electron donative substituents) which comprises reacting aldehydes represented by general formula (I)RCHO (I)(where R is a s defined above) with acetone, in the presence as a catalyst of one or tow or more compounds selected from the group consisting of perhydroisoindole and pyrrolidine which may have substituents, in a water solvent, at 20.degree. C. to 40.degree. C., and then reacting at the reflux temperature.The compound (II) is extremely important as an intermediate for pharmaceuticals and agricultural chemicals.

    摘要翻译: PCT No.PCT / JP90 / 01488 Sec。 371日期1991年7月15日 102(e)日期1991年7月15日PCT 1990年11月15日PCT PCT。 公开号WO91 / 07371 1991年5月30日的日期。本发明涉及一种制备由通式(II)表示的α,β-不饱和酮的方法(II)(其中R是在环中具有氮原子的杂环基或 具有电子供体取代基的苯基),其包括使通式(I)表示的醛(其中R如上所定义)与丙酮在一种或多种或多种选自以下的化合物的催化剂存在下反应: 在水溶剂中在20℃至40℃下可以具有取代基的全氢异吲哚和吡咯烷组成的组,然后在回流温度下反应。 化合物(II)作为药物和农药的中间体是非常重要的。

    Method for the synthesis of .alpha. .beta.-unsaturated ketones
    2.
    发明授权
    Method for the synthesis of .alpha. .beta.-unsaturated ketones 失效
    α-不饱和酮的合成方法

    公开(公告)号:US5484949A

    公开(公告)日:1996-01-16

    申请号:US204920

    申请日:1994-03-02

    摘要: The present invention relates to a method for the synthesis of .alpha., .beta.-unsaturated ketones which comprises, in the method for the synthesis of .alpha., .beta.-unsaturated ketones represented by general formula ##STR1## reacting aldehydes represented by general formulaR.sup.1 CHO(where R.sup.1 is as defined above) with alkali metal salt of acetoacetic acid represented by general formula ##STR2## (where M.sup..sym. is an alkali metal ion), in the presence as a catalyst of 3-azabicyclo[3,2,2]nonane, a cyclic secondary amine represented by general formula (1) ##STR3## a cyclic secondary amine represented by general formula (2) ##STR4## (where, l is 1 or more and up to 6, a ring with N is a 6-membered, 7-membered or 8-membered ring, the two neighbors of N are methylene, R.sup.3 is a lower alkyl group, its substitution position is at a carbon atom other than two those adjacent to N, and ##STR5## is an alicyclic group or a phenol group), or a secondary amine represented by general formula (3)CH.sub.3 NHCH.sub.2 R.sup.4 (3)in a mixuture solvent of water and water-insoluble organic solvent, while keeping the pH constant with mineral acid, and by adjusting an amount of water.

    摘要翻译: 本发明涉及一种合成α,β-不饱和酮的方法,该方法包括在合成α,β-通式为不饱和酮的方法中,所述β-不饱和酮通式为通式R 1 CHO(其中R 1 与上述通式[IMAGE]所示的乙酰乙酸的碱金属盐作为3-氮杂双环[3,2,2]壬烷的催化剂,由通式(1)表示的环状仲胺 (1)由通式(2)表示的环状仲胺(2)(其中,l为1以上且至多6,具有N的环为6元,7元或8元 环,N的两个邻位是亚甲基,R3是低级烷基,其取代位置在与N邻接的两个以外的碳原子上,并且是脂环族基团或苯酚基团)或二级 由通式(3)CH3NHCH2R4(3)表示的胺在水和水不溶物的混合溶剂中 有机溶剂,同时用无机酸保持pH恒定,并调节一定量的水。