process for the production of 10 - dioxo - 9 amp; amp; alpha; - fluoride - 11 amp; amp; beta; hydroxy 16 amp; amp; alpha; - methyl - 21 - acetoxy - pregna - 1.4 - india

摘要

P the invention has for its object a process for preparing the 3,20 - dioxo 9 alpha - fluoro 11 beta - hydroxy 16 alpha - methyl 21 - acetoxy pregna 1,4 - diene which consists in reacting a methyl magnesium halide, in the presence of a catalytic quantity of cuprous chloride, on the 3,20 - dioxo 9 alpha - fluoro 11 beta hydroxy - 21 - acetoxy pregna - 1,4,16 - triene. / p