利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

292 条记录 (耗时 0.026 秒)

    PRODUCTION OF ESTER
    8.
    发明专利
    PRODUCTION OF ESTER 失效

    公开(公告)号：JP2000256261A

    公开(公告)日：2000-09-19

    申请号：JP6472699

    申请日：1999-03-11

    申请人： DAICEL CHEM

    发明人： ISHII YASUTAKA ,  NAKANO TATSUYA

    IPC分类号： C07B41/12 ,  C07C67/00 ,  C07C69/03 ,  C07C69/12

    摘要： PROBLEM TO BE SOLVED: To produce an ester useful as industrial chemicals, medicaments, perfume, dye, an organically synthetic intermediate or the like in a good yield in one step by reacting a specific carbonyl compound with a specific oxime ester or a specific enol ester in the presence of an alkoxide. SOLUTION: By reacting 1 mol carbonyl compound of formula I (wherein, R1 and R2 are each H or an organic group) with preferably 0.8-5 mol oxime ester compound of formula II (wherein, R3-R5 are each a nonreactive atom or the like) or enol ester compound of formula III(wherein, R6-R8 are each H, a 1-5C alkyl or the like) in the presence of an alkoxide of a group III element (e.g. scandium isopropoxide or the like) preferably at 10-60 deg.C for 10 min to 48 h., an ester of formula IV is obtained. The consumed amount of the alkoxide of a group III element is preferably 1.5-3 equivalent times the amount of the compound of formula I.