Bicycloalkane derivatives of the formula ##STR1## WHEREIN N IS 1 OR 2, R.sub.1 is lower alkyl, X is carbonyl or free or etherified hydroxymethylene, and Y is --S--R.sub.2, --SO.sub.m --R.sub.2, or ##STR2## wherein m is 1 or 2, R.sub.2 is alkyl, R.sub.3 is hydrogen or lower alkyl, R.sub.4 is aliphatic acyl and Z is nitro, lower alkanoyl, lower alkylsulfinyl, or lower alkylsulfonyl are useful intermediates in the total synthesis of steroids. The compounds are prepared by reacting a corresponding compound lacking the CH.sub.2 Y substituent with formaldehyde and a mercaptan or a sulfinic acid, followed if desired by oxidation and optional salt condensation.
公式为##STR1##的双环烷衍
生物,其中N为1或2,R.sub.1为较低的烷基,X为羰基或自由的或醚化的羟甲基,Y为--S--R.sub.2,--SO.sub.m --R.sub.2,或##STR2##其中m为1或2,R.sub.2为烷基,R.sub.3为氢或较低的烷基,R.sub.4为脂肪酰基,Z为硝基,较低的醇酰基,较低的烷基亚砜基,或较低的烷基磺酰基,在类
固醇的全合成中是有用的中间体。这些化合物是通过将缺少CH.sub.2 Y取代基的相应化合物与
甲醛和巯基或亚砜酸反应制备的,随后如有需要进行氧化和可选的盐缩合。