The Synthesis of D-Heteroannulated 3β-Hydroxy-13α-androst-5-ene Derivatives via α-Oxoketene Dithioacetal and α-Oxohydroxymethylidene Synthons
摘要:
16-Ketene dithioacetal derivatives of 3 beta-hydroxy-13 alpha-androst-5-en-17-one react with amidine, benzamidine, or guanidine to yield novel pyrimido-fused D-heteroannulated steroids. The reactions of 3 beta-hydroxy-16-hydroxymethylidene-13 alpha-androst-5-en-17-one with N,N'-dinucleophiles furnish heterocycles containing a pyrazole ring fused to positions 16,17 of the sterane skeleton.
The Synthesis of D-Heteroannulated 3β-Hydroxy-13α-androst-5-ene Derivatives via α-Oxoketene Dithioacetal and α-Oxohydroxymethylidene Synthons
摘要:
16-Ketene dithioacetal derivatives of 3 beta-hydroxy-13 alpha-androst-5-en-17-one react with amidine, benzamidine, or guanidine to yield novel pyrimido-fused D-heteroannulated steroids. The reactions of 3 beta-hydroxy-16-hydroxymethylidene-13 alpha-androst-5-en-17-one with N,N'-dinucleophiles furnish heterocycles containing a pyrazole ring fused to positions 16,17 of the sterane skeleton.