Fuji Yakuhin Kogyo Kabushiki Kaisha

National Federation of Agricultural Cooperative Associations

Nitto Denko Co. Ltd.

Masakazu Aburatani

Kenji Mori

Tadashi Takeuchi

Shuji Senda

Tetsuo Omata

Yasuo Ninomiya

Miklos Toth

Hans-Rudolf Buser

Heinrich Arn

6,6-Ethylenedioxy-22R-hydroxy-2R,3S-isopropylidenedioxy-5.alpha.-cholest-23 -yne, useful as an intermediate for the synthesis of brassinolide.

6,6-ethyl

The present invention provides mainly (3Z,6Z)-cis-9,10-epoxy-1,3,6-heneicosatriene (formula 1) and (3Z, 6Z)-cis-9,10-epoxy-1,3,6-elcosatriene (formula 2) which are Hyphantria cunea sex pheromones. The invention provides attractant components having high attraction effect for Hyphantria cunea, that is, Hyphantria cumea sex pheromones having high attraction activity and the intermediates which can selectively synthesize such pheromones with great ease. Furthermore, the invention provides attractant compositions with high attraction effect for Hyphantria cunea including such above noted pheromones. Consequently, this invention is completed. ##STR1##

Hyphantria cunea sex pheromones and attractant compositions including

New steroid compounds of the general formula: ##STR1## wherein X is a hydroxyl group and Y is a hydrogen atom, or X and Y, taken together, form an oxo group; each of the two R' radicals is independently a hydrogen atom, acyl group, a silyl group, an alkoxycarbonyl group or a benzyl group, or the two R' radicals, taken together, form an alkylidene or a carbonyl group, the stereo-configuration at the 22- and 23-positions being either 22R and 23R or 22S and 23S; and R' and R'' are independently of each other a hydrogen atom or a lower alkyl group, as well as processes for preparing same. These new steroid compounds are valuable intermediates for brassinolide and its analogues useful as plant hormones.

3.alpha.,5-cyclo-22,23-dihydroxy-5.alpha.-steroid compounds

Growing community of inventors

Takaoka, Japan

Masakazu Aburatani