Title:
ピラゾールおよびその誘導体の製造方法
Document Type and Number:
Japanese Patent JP3717177
Kind Code:
B2
Abstract:
PCT No. PCT/EP94/02708 Sec. 371 Date Feb. 15, 1996 Sec. 102(e) Date Feb. 15, 1996 PCT Filed Aug. 13, 1994 PCT Pub. No. WO95/06036 PCT Pub. Date Mar. 2, 1995A process for preparing pyrazole and its derivatives of the formula I I where R1, R2, R3 and R4 are each hydrogen, halogen, nitro, carboxyl, sulfonyl or C-organic radicals, from alpha,beta-unsaturated carbonyl compounds of the formula II II and hydrazine or hydrazine derivatives of the formula III H2N-NHR4 III wherein, initially without additional diluent, an alpha,beta-unsaturated carbonyl compound of the formula II is reacted with hydrazine or a hydrazine derivative of the formula III, and the resulting reaction mixture is reacted in another step with a mixture of sulfuric acid and iodine or a compound which liberates iodine or hydrogen iodide.
Inventors:
Merkure, Hans, Rupert
Fretuner, Erich
Fretuner, Erich
Application Number:
JP50732195A
Publication Date:
November 16, 2005
Filing Date:
August 13, 1994
Export Citation:
Assignee:
BASF Aktiengesellschaft
International Classes:
C07B35/04; C07D231/12; C07D521/00; (IPC1-7): C07D231/12
Domestic Patent References:
| JP57082373A | ||||
| JP3115265A |
Attorney, Agent or Firm:
Satoshi Eto