the condensed heterocycles 2a,b prepared by cyclization from β-ketosulfoxides 1a,b gave β-ketones 3a,b, which were condensed with 2-carbethoxymethyl-piperidine 4 to afford the 10,17-diazasteroid 6 and the 10-aza-17-thiasteroid 7, respectively.
用阮内
镍脱
硫后,由β-酮亚砜1a,b环化制得的稠合杂环2a,b得到β-酮3a,b,与2-碳乙氧基甲基-
哌啶4缩合得到10,17-二氮甾类化合物6和10 aza-17 thiasteroid 7。