Title:
【発明の名称】1H―ピラゾロ〔5,1―C〕―1,2,4―トリアゾール化合物の製造方法
Document Type and Number:
Japanese Patent JPH089620
Kind Code:
B2
Abstract:
There are disclosed processes of producing a 1H-pyrazolo(5,1-c)-1,2,4-triazole compound by (1) the ring-formation reaction of 5-hydrazino-1H-pyrazole with a carboxylic acid and by (2) the ring-closure reaction of a 5-acylhydrazino-1H-pyrazole, wherein both the reactions are carried out in the presence of a phosfolan compound or phosphonium salt formed from a tertiary phosphine and a halogenating agent. The disclosure described provides a method of producing a 1H-pyrazolo(5,1-c)-1,2,4-triazole compound that can be carried out efficiently in one step in simplified process with improved yield compared with the prior process.
More Like This:
Inventors:
Hiroki Mizukawa
Application Number:
JP1176590A
Publication Date:
January 31, 1996
Filing Date:
January 23, 1990
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
G03C7/38; C07D487/04; (IPC1-7): C07D487/04
Attorney, Agent or Firm:
Toshizo Iida
Next Patent: STEPPING MOTOR