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    • 3. 发明专利
    • Method for producing optically active amino acid derivative
    • 生产光学活性氨基酸衍生物的方法
    • JP2005247734A
    • 2005-09-15
    • JP2004059147
    • 2004-03-03
    • Otsuka Chemical Co Ltd大塚化学株式会社
    • TANAKA HITOSHINIWA MIKIASAI HIROAKI
    • C07C231/12C07B61/00C07C233/47
    • PROBLEM TO BE SOLVED: To provide a convenient method for producing an optically active amino acid derivative suitable for industrial production.
      SOLUTION: The method for producing the optically active amino acid derivative comprises reducing a compound represented by general formula (1) (wherein, R
      1 and R
      2 are the same or different, and each a hydrogen atom, an alkyl group, a halogen, an amino group, -NHCOR
      4 , -OR
      4 , or -OCOR
      4 ; R
      3 is an alkyl group, an amino group, -NHCOR
      4 , -OR
      4 , or -OCOR
      4 ; R
      4 is a hydrogen atom, an alkyl group or an aryl group; with the proviso that at least one of R
      1 to R
      3 is the -NHCOR
      4 ) in the presence of a palladium-carbon catalyst with hydrogen to provide the amino acid derivative.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供适合于工业生产的光学活性氨基酸衍生物的方便的方法。 解决方案:用于制备光学活性氨基酸衍生物的方法包括将通式(1)表示的化合物(其中,R 1和R 2分别是 相同或不同,并且各自为氢原子,烷基,卤素,氨基,-NHCOR 4,或-OR SP 3,或-OCOR 4 R 3是烷基,氨基,-NHCOR 4,或-OR SP 3,或-OCOR 4 ; R 4 是氢原子,烷基或芳基;条件是R SP 1至R SP中的至少一个 在具有氢气的钯 - 碳催化剂的存在下,将3> 是-NHCOR 4 )以提供氨基酸衍生物。 版权所有(C)2005,JPO&NCIPI
    • 10. 发明专利
    • PRODUCTION OF ALPHA,ALPHA-DIHALOKETONE DERIVATIVE
    • JPH04164045A
    • 1992-06-09
    • JP29007090
    • 1990-10-25
    • OTSUKA CHEMICAL CO LTD
    • AKATA ATSUOASAI HIROAKI
    • B01J31/02B01J31/04C07B61/00C07C67/287C07C67/29C07C69/63
    • PURPOSE:To obtain the subject compound with industrial advantage by reacting 2,5-diacetoxy-3-hexyne, etc., with chlorine, etc., in the presence of a catalytic amount of a secondary amine derivative, etc., in an aqueous solution of an alkali metal bromide containing an alkali metal bicarbonate, etc. CONSTITUTION:A compound of formula I (Both of two R are methyl. Or one of them is methyl and the other is ethyl) is reacted with chlorine or sodium hypochlorite in the presence of a catalytic amount of a secondary amine derivative or in the presence of a catalytic amount of a secondary amine (e.g. 2,2,6,6- tetramethylpiperidines or di-t-butylamine) and a catalytic amount of an organic peracid (e.g. lower carboxylic acid such as performic acid or peracetic acid or aromatic carboxylic acid such as perbenzoic acid, perphthalic acid or metachloroperbenzoic acid) in an aqueous solution of an alkali metal bromide containing an alkali metal bicarbonate or an alkali metal phosphate, thus obtaining the objective compound of formula III useful as an intermediate for synthesis of compounds (perfume substance for food) of formula I in a high yield using an readily available catalyst and an economic oxidizing agent ready to handle without requirement of a special reaction apparatus.