Process for making 3-oxo-4-aza-androst-1-ene 17-.beta.-ketones

Details Process for making 3-oxo-4-aza-androst-1-ene 17-.beta.-ketones Process for making 3-oxo-4-aza-androst-1-ene 17-.beta.-ketones

C - Chemistry, Metallurgy

07

J

C07J 73/00 (2006.01)

Patent

CA 2050824

32/RJN15 Case 18219 TITLE OF THE INVENTION NEW PROCESS FOR MAKING 3-OXO- 4-AZA-ANDROST-1-ENE 17.beta.-KETONES ABSTRACT OF TEE INVENTION Described is a new process for preparing 3-oso-4-aza-androst-1-ene 17.beta.-ketones. The process involves converting the corresponding 17.beta.-alkyl carboxylate to the N-methoxy-N-methyl carboxamide and reacting this with an appropriate Grignard reagent to form the desired ketone. The reaction, can be conducted in "one pot", thus eliminating isolation of intermediates and avoiding the use of less stable intermediates, e.g., acid chlorides, acyl imidazolides and the like.

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