The synthesis of steroidal [16α,17α-d]-2'-pyrazolines and [16,17-d]-pyrazoles

Article abstract of DOI:10.1016/0040-4020(78)80195-1

The addition of diphenylnitrilimines to a series of steroidal 16,17-dipolarophiles occurs with the same regio specificity in all cases regardless of the nature of the 17-substituent, to yield [16α, 17α-d]-2'pyrazolines. The adducts from the 17-acetoxy-16,