【摘 要】
：
Title compounds 2',2'-dimethylcholesta-2,4-dien[3,2-b]-pyran-4'-one(3),2',2'-dimethyl-3β-substituted cholesta-4,6-dien[7,6-b]-pyran-4'-one(6a,b)and(6c)were pre
【机 构】
：
Department of Chemistry(Steroid Lab),Department of Biochemistry
论文部分内容阅读
Title compounds 2',2'-dimethylcholesta-2,4-dien[3,2-b]-pyran-4'-one(3),2',2'-dimethyl-3β-substituted cholesta-4,6-dien[7,6-b]-pyran-4'-one(6a,b)and(6c)were prepared by the cyclization of 2-acetylcholesta-2,4-dien-3-ol(2),6-acetyl-3β-substituted-cholesta-4,6-dien-7-ol(Sa,b)and(5c)respectively,with pyrrolidine,dry benzene and dry acetone using Dean Stark separator through conventional heating.Furthermore,compounds were also found to be active against Mycobacterium tuberculosis.
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