中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 17β-acetoxy-5β-androstan-3-one | 1164-92-7 | C21H32O3 | 332.483 |
A method to achieve the unsymmetric cleavage of C-2 and C-3 in 3-keto-5β-steroids is developed. This involves a cine substitution of 4-bromoketone to produce the 2-acetoxyketone. Possible mechanisms for this transformation are discussed and the route proceeding through the oxyallyl intermediate is considered most plausible. The 2-acetoxyketone is converted into the hydroxyoxime which undergoes a Beckmann fragmentation to yield the 2,3-seco-steroid. These products are useful intermediates for the synthesis of the salamander alkaloids.