PROCESS FOR THE PREPARATION OF UNSATURATED TRIFLUOROMETHANESULPHONATE STEROID DERIVATIVES
申请人:OLON S.p.A.
公开号:EP2947092A1
公开(公告)日:2015-11-25
Disclosed is a method for the conversion of a compound of formula 3 to a compound
of formula 4, wherein R is an acetyl group or an alcohol-protecting group. The process involves reacting 3 with a triflating agent in the presence of a nicotinate (3-pyridinecarboxylate) of a C1-C4 alcohol, preferably methyl nicotinate (methyl 3-pyridinecarboxylate) or ethyl nicotinate (ethyl 3-pyridinecarboxylate), to give 4. The method can be conveniently used in a process for the preparation of Abiraterone or Abiraterone acetate.
[EN] PROCEDURE FOR THE PREPARATION OF ABIRATERONE ACETATE AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACÉTATE D'ABIRATÉRONE ET D'INTERMÉDIAIRES DE CE DERNIER
申请人:OLON SPA
公开号:WO2015114518A3
公开(公告)日:2015-12-17
PROCEDURE FOR THE PREPARATION OF ABIRATERONE ACETATE AND INTERMEDIATES THEREOF