[EN] PROCESS AND NEW INTERMEDIATES FOR THE PREPARATION OF 11-METHYLENE STEROIDS<br/>[FR] PROCÉDÉ ET NOUVEAUX INTERMÉDIAIRES POUR LA PRÉPARATION DE STÉROÏDES 11-MÉTHYLÈNE
申请人:BIONICE S L U
公开号:WO2017149091A1
公开(公告)日:2017-09-08
The invention relates to a process for the preparation of 11 -methylene steroids through selective olefination of the ketone at position 11. The resulting products are useful intermediates in the preparation of several pharmaceutically active agents, such as Etonogestrel and Desogestrel.
[EN] COMBINED SYNTHESIS ROUTE FOR ETONOGESTREL AND DESOGESTREL<br/>[FR] VOIE DE SYNTHÈSE COMBINÉE DE L'ÉTONOGESTREL ET DU DÉSOGESTREL
申请人:MSD OSS BV
公开号:WO2013135744A1
公开(公告)日:2013-09-19
The present invention relates to a synthesis route and to steroid derivatives of general formula VI and VII useful in the synthesis of desogestrel and etonogestrel.
HEUVEL, M. J. VAN DEN;BOKHOVEN, C. W. VAN;JONGH, H. P. DE;ZEELEN, F. J., REC. TRAV. CHIM. PAYS-BAS, 107,(1988) N 4, 331-334
作者:HEUVEL, M. J. VAN DEN、BOKHOVEN, C. W. VAN、JONGH, H. P. DE、ZEELEN, F. J.
DOI:——
日期:——
A partial synthesis of 13-ethyl-11-methylene-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (desogestrel) based upon intramolecular oxidation of an 11β-hydroxy-19-norsteroid to the 18 → 11β-lactone
作者:M. J. van den Heuvel、C. W. van Bokhoven、H. P. de Jongh、F. J. Zeelen
DOI:10.1002/recl.19881070406
日期:——
A partialsynthesis of the 13-ethyl-18-norsteroid desogestrel is reported. The key step in this synthesis is the intramolecularoxidation of 11β-hydroxyestr-5-ene-3,17-dione cyclic bis-(1,2-ethanediyl acetal) 3 with Pb(OAc)4 and iodine to 3,3:17,17-bis[1,2-ethanediylbis(oxy)]-11β-hydroxyestr-5-en-18-oic acid γ-lactone 2.