m.p. 165-166", a~ $28" Chf, XChf 2.9 p. The sample decomposed when dried for analysis a t 60"; another sample was dried for a prolonged period at room temperature but analysis showed that it still contained solvent (carbon 1.6% low). A next fraction, eluted by 4: 10 petroleum ether-benzene on crystallization as above gave short needles, m.p. 175177" (80 mg.); this appeared to be a mixture of XVII and
mp 165-166", a~ $28" Chf, XChf 2.9 p. 样品在 60" 下干燥进行分析时分解;另一个样品在室温下干燥了很长时间,但分析表明它仍然含有溶剂(碳含量低 1.6%)。下一个馏分,由 4:10 石油醚-苯洗脱如上所述结晶得到短针状物,mp 175177英寸(80毫克);这似乎是 XVII 和 XVIII 的混合物,因为当与任何一种混合时,它都不会降低 mp。然后用1:1石油醚-苯洗脱&-羟基衍
生物XVII;从
甲醇-
丙酮结晶得到80mg。(19%) 亮板,mp 192-193",CYD +59" Chf,XChf 2.9 fi。该物质也是
水合的并且对热太敏感而不能令人满意地干燥。Cholestane-2a-ol (VII) from XVI1.-Treatment of 80 mg。XVII与雷尼
镍在回流的
丙酮中(1.5小时)和产物从
甲醇-
丙酮结晶得到25mg。(77%)