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.
17-Beta-ethynylsteroids and process for preparing same
申请人:MITSUBISHI KASEI CORPORATION
公开号:EP0053845A1
公开(公告)日:1982-06-16
Intermediates, i.e. 17a-ethynyl steroids, of the formula:
wherein the dotted lines represent either a single or double bond, and X is hydroxyl or an acyloxy, and a process fortheir preparation.
These compounds are useful in the preparation of corticoids such as hydrocortisone and prednisolone, and a process for preparing the same.
Transformed steroids. 186. Use of the diacetoxyiodobenzeneiodine system for the conversion of epimeric 17-ethynylandrost-4-en-17-ol-3-ones to pregnanes
作者:A. M. Turuta、I. V. Vesela、A. V. Kamernitskii、Rodoslav Vlakhov
DOI:10.1007/bf00959734
日期:1991.12
Epimeric 17-acetoxy-17-ethynylandrost-4-en-3-ones react with diacetoxyiodobenzene and iodine in acetic acid or methanol in an unusual manner to give 17-acetoxy-21,21-diiodo-17-pregn-4-en-3,20-diones, which are then converted to 21-monoiodides and 21-acetates. Epimeric 17-hydroxy-17-ethynylandrost-4-en-3-ones are inert under these conditions.
TURUTA, A. M.;FADEEVA, T. M.;KAMERNITSKIJ, A. V.;KOROBOV, A. A.;CHEREPANO+, IZV. AN CCCP. CEP. XIM.,(1990) N, S. 675-681
作者:TURUTA, A. M.、FADEEVA, T. M.、KAMERNITSKIJ, A. V.、KOROBOV, A. A.、CHEREPANO+