Mitsubishi Chemical Industries Limited

Toshio Haruyama

Issei Nitta

Shinya Inoue

Shinichiro Fujimori

This is disclosed novel intermediates, i.e. 17.beta.-ethynylsteroids, which are useful for the preparation of corticoids such as hydrocortisone and prednisolone, and a process for preparing the same.

17.beta.-ethynylsteroids and process for preparing same

There is disclosed novel intermediates, i.e. acyloxysteroids, which are useful for the preparation of corticoids such as hydrocortisone and prednisolone, and a process for producing the same.

Acyloxysteroids and process for producing same

A 4,6-dien-3-one steroid is produced by brominating an enolic ether of a 4-en-3-one steroid in a water-containing organic solvent which is substantially free from acetic acid and sodium acetate to give a 6-bromosteroid and then dehydrobrominating the 6-bromosteroid in a medium which contains dimethylformamide or N-methylpyrrolidone and 1 to 9% by volume of water.

Growing community of inventors

Sagamihara, Japan

Toshio Haruyama