作者:S.V. Kessar、Y.P. Gupta、R.K. Mahajan、G.S. Joshi、A.L. Rampal
DOI:10.1016/0040-4020(68)88039-1
日期:——
Michael addition of 1-acetoxy-5-nitro-2-methylpentane to cis-5,17(20)-pregnadien-3β-ol-16-one furnishes adducts which readily lead to steroidal sapogenins. By using nitroacetates of appropriate configuration, stereoselective syntheses of kryptogenin, diosgenin and yamogenin have been affected.
1-乙酰氧基-5-硝基-2-甲基戊烷的迈克尔加成到顺式-5,17(20)-孕烷-3β-ol-16-one上,提供了易于产生甾体皂苷元的加合物。通过使用适当构型的硝基乙酸盐,k原蛋白,薯os皂苷元和山梨生成素的立体选择性合成受到了影响。