STUDY ON ASYMMETRIC SYNTHESIS OF STEROIDS ⅩⅥ. SYNTHESIS OF dl-3-OXA-A-NOR STEROID

GP Wei, WS Zhou. STUDY ON ASYMMETRIC SYNTHESIS OF STEROIDS ⅩⅥ. SYNTHESIS OF dl-3-OXA-A-NOR STEROIDJ. Acta Pharmaceutica Sinica, 1990, 25(1): 69-72.

Citation:

GP Wei, WS Zhou. STUDY ON ASYMMETRIC SYNTHESIS OF STEROIDS ⅩⅥ. SYNTHESIS OF dl-3-OXA-A-NOR STEROIDJ. Acta Pharmaceutica Sinica, 1990, 25(1): 69-72.

Citation:

GP Wei, WS Zhou. STUDY ON ASYMMETRIC SYNTHESIS OF STEROIDS ⅩⅥ. SYNTHESIS OF dl-3-OXA-A-NOR STEROIDJ. Acta Pharmaceutica Sinica, 1990, 25(1): 69-72.

Abstract

A synthesis of racemic 3-oxa-A-nor steroid, 8, is reported. The conjugated addition of anion 5 of 5'-methylfuryl dithiane with 4,an intermediate formed from the racemic dionesulfone 3 afforded 6,which was converted to 7 by cyclization under acidic condition. Desulfurization of 7 with tri-n-butyltin hydride gave the title compound 8, which is an intermediate of the target molecule 1b.

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