Title:
【発明の名称】4-ハロゲノ-2-置換オキシイミノ-3-オキソ酪酸のエステルまたはアミドの製造法
Document Type and Number:
Japanese Patent JPH0830051
Kind Code:
B2
Abstract:
A method of producing a 4-halo-2-(substituted or unsubstituted)hydroxyimino-3-oxobutyric acid ester or amide, which is a synthetic intermediate of value for the production of cephalosporins containing an aminothiazole group, characterized by reacting a 2-(substituted or unsubstituted)hydroxyimino-3-oxobutyric acid or an ester or amide thereof with a silylating agent and reacting the resulting novel 2-(substituted)hydroxyimino-3-silyloxy-3-butenoic acid ester or amide with a halogenating agent.
Inventors:
NAITO KENZO
ISHIBASHI YUKIO
ISHIBASHI YUKIO
Application Number:
JP11667386A
Publication Date:
March 27, 1996
Filing Date:
May 21, 1986
Export Citation:
Assignee:
TAKEDA CHEMICAL INDUSTRIES LTD
International Classes:
C07C67/00; C07C239/00; C07C249/00; C07C249/12; C07C251/00; C07C251/32; C07C251/38; C07F7/18; (IPC1-7): C07C251/38; C07C249/12
Attorney, Agent or Firm:
Tadao Asahina (2 outside)
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