PROCEDE DE PREPARATION DE 3,20-DIOXO 16AU-METHYL PREGNA 1,4,9( 11)TRIENES

摘要

The invention relates to a process for the production of 16 alpha -methyl- DELTA 1,4,9(11)-pregnatrien-3,20-diones having the formula WHEREIN R is hydrogen or the acyl of a carboxylic acid having 1 to 18 carbon atoms, pharmacological preparations containing said 16 alpha -methyl- DELTA 1,4,9(11)-pregnatrien-3,20-diones and methods of treating allergies using the above pharmacological preparation.