A-ring enollactones 1a, 1b or 9 derived from 4-cholesten-3-one, testosterone benzoate or 3-oxo-4-estren-17β-yl benzoate were condensed with acetyl chloride to give intermediates 2a, 2b or 10. 2a and 2b were cyclized by acid or base to give 3,4-1
Yuan, Sun-Shine
p. 279 - 290
(2007/10/02)
Steroid series. XVII. New synthetic routes to 19-norsteroids.
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Tanabe,Takasaki,Hayashi,Morisawa,Hashimoto
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(2007/10/10)
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