Title:
【発明の名称】プレグナン誘導体の製造方法
Document Type and Number:
Japanese Patent JPH0710877
Kind Code:
B2
Abstract:
Known pregnane derivatives are prepared by esterificiation of known androstane derivatives to give new ester of Formula III (III) wherein in each case symbolizes a single bond or a double bond, n is 1 or 2, R1 is hydrogen or methyl, R2 is hydrogen or formyl, and R3 is chlorine, hydroxy or an alkanoyloxy group of up to 6 carbon atoms, and reaction of the latter with Ag(I) and formic acid.
Inventors:
Helmut Hofmeister
Klaus Annen
Henry Laurent
Rudolf Weichert
Klaus Annen
Henry Laurent
Rudolf Weichert
Application Number:
JP20358685A
Publication Date:
February 08, 1995
Filing Date:
September 17, 1985
Export Citation:
Assignee:
Schie-Ring Actien Gezershaft
International Classes:
B01J23/50; C07B61/00; C07J1/00; C07J5/00; C07J7/00; C07J9/00; C07J41/00; C07J63/00; C07J75/00; (IPC1-7): C07J75/00
Domestic Patent References:
| JP52151157A | ||||
| JP57179198A | ||||
| JP57181100A | ||||
| JP57193499A |
Attorney, Agent or Firm:
Toshio Yano (1 outside)
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