Toward a general synthesis of A-ring trihydroxylated vitamin D analogs: Synthesis of an A-ring synthon of ED-71 from d-arabinose
作者:Robert M. Moriarty、Harry Brumer
DOI:10.1016/0040-4039(95)02008-d
日期:1995.12
(3R, 4S, 5R)-3, 4-(O-isopropylidene)-5-(tert-butyldimethylsiloxy) was synthesized from D-arabinose in 9 steps and 28% yield and coupled via the Trost-Dumas carbopalladation method to a steroidal CD-ring fragment to yield 1 alpha,2 beta-dihydroxyvitamin D-3.
(3R,4S,5R)-3,4-(O-异丙叉基)-5-(叔丁基二甲基硅氧基)化合物经9步反应,产率为28%,由D-阿拉伯糖合成,并通过Trost-Dumas卡波烯钯化方法与甾体CD环片段偶联,生成1α,2β-二羟基维生素D-3。