The synthesis of 3β-hydroxy-5-azacholestane (10a) from cholesterol (1) is described. B-norcholest-4-ene-3-one (2) obtained from 1, was reduced to carbinol 3a. The aeetyl derivative (3b) of the latter, after ozonolysis and methylation, afforded the methyl ester of 3β-acetoxy-4,5-seco-5-keto-B-norcholestan-4-oic acid (5b). Beckmann rearrangement of the oxime 6, obtained from 5b, yielded lactam 7b, which
描述了由
胆固醇(1)合成3β-羟基-5-氮杂胆甾烷(10a)。从1获得的B-norcholest-4-ene-3-one(2)还原为
甲醇3a。在
臭氧分解和甲基化之后,后者的乙酰基衍
生物(3b)提供了3β-乙酰氧基-4,5-seco-5-酮-B-降胆甾烷-4-酸的甲酯(5b)。由5b得到的
肟6的贝克曼重排,得到内酰胺7b,内酰胺7b
水解为羟酸7a ; 后者在N-环化和
LAH还原后,得到3β-羟基-5-氮杂胆甾烷(10a)。