Bierman and Muserlian
Preparation of .DELTA..sup.9(11) steroid
 A process for the preparation of a compound of the formula ##STR1## comprising reacting a compound of the formula ##STR2## with chlorosulfonic in an organic solvent wherein the reaction is effected at -20.degree. C. to -10.degree. C. and the temperature is then allowed to rise to 0.degree. C. to 5.degree. C. 
Roussel-Uclaf
C
C07J
inventional
Patrick Jean Michel
Roussel Buendia Vivat