Nippon Kayaku Kabushiki Kaisha

Tama Biochemical Co., Ltd.

Sei-ichi Hayashi

Tadashi Hohjoh

Tsuyoshi Watanabe

Nobuo Ikekawa

Suguru Takatsuto

Hiroki Kuriyama

Atsuhiko Shida

Tokuo Furuse

Disclosed herein is a novel steroids represented by the formula (1): ##STR1## wherein Z represents ##STR2## n is integer of 1 to 3, R represents hydrogen, halogen, CF.sub.3, lower alkyl, lower alkoxy or --CO.sub.2 R', wherein R' represents hydrogen, alkali metal or lower alkyl, and

23-Phenylsteroids

A process for producing a steroid compound which is useful as an intermediate for synthesizing plant growth regulators, brassinosteroids, and is represented by the general formula (4): ##STR1## in which R.sub.2 is a methyl or ethyl, and * indicates the binding site of R.sub.1 to a steroid nucleus, or general formula (5): ##STR2## wherein R.sub.1 is as defined above. According to the process disclosed herein, an intermediate for a brassinolide, epibrassinolide, homobrassinolide or derivatives thereof can be produced highly advantageously in the industries.

Process for producing steroid derivatives

Growing community of inventors

Saitama, Japan

Sei-ichi Hayashi