New steroidal heterocycles: androstano[3,2-b](pyrimido[1,2-a]benzimidazoles)
Abstract
The preparation of steroidal heterocycles containing the pyrimido[1,2-a]benzimidazole ring system fused to the 2,3-position of the steroid nucleus is described. These are prepared by the reaction of 2-aminobenzimidazole with 2-hydroxymethylene-3-oxo-steroids.