Method of preparing 11.beta., 17.alpha., 20, 21-tetrahydroxy...

Details Method of preparing 11.beta., 17.alpha., 20, 21-tetrahydroxy... Method of preparing 11.beta., 17.alpha., 20, 21-tetrahydroxy...

C - Chemistry, Metallurgy

12

P

195/30, 260/4, 2

C12P 33/08 (2006.01) C07J 5/00 (2006.01)

Patent

CA 1220195

-0- METHOD OF PREPARING 11.beta., 17.alpha., 20, 21- TETRAHYDROXY STEROIDS AND CORRESPONDING 11.beta., 17.alpha., 21-TRIHYDROXY-20-OXO STEROIDS Abstract of the Disclosure Disclosed herein is a method for preparing 11.beta., 17.alpha., 20, 21-tetrahydroxy steroids of the pregnane class. This method comprises incubating the corresponding 17.alpha., 20.alpha. or .beta., 21-trihydroxy steroid in the presence of a culture medium capable of effecting the 11.beta.-hydroxylation, such medium comprising a fungal culture of the genus Curvularia. Also disclosed herein is a method for preparing 11.beta., 17.alpha., 21-trihydroxy-20-oxo steroids of the pregnane class. This method comprises the hydroxylation method described hereinabove followed by conversion of the resulting 11.beta., 17.alpha., 20.alpha. or .beta., 21-tetrahydroxy steroid into the corresponding 11.beta., 17.alpha., 21-trihydroxy-20-oxo steroid.

452689

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