A new route to precursors of ecdysteroids using a regio- and stereoselective hydroboration
作者:F Dolle
DOI:10.1016/s0040-4020(01)96160-5
日期:1991.8.19
We have developed a new route to precursors of ecdysteroids, using a regio- and stereoselective hydroboration. Hydroboration of 3,3-(ethylenedioxy)-cholesta-5,7-diene (from 7-dehydrocholesterol in two steps), followed by oxidation with alkaline hydrogen peroxide, produces 3,3-(ethylenedioxy)-5β-cholest-7-en-6β-ol (the same reaction with 7-dehydrocholesterol leads only to the 5α-alcohol (OH-6α), prohibiting
我们使用区域选择性和立体选择性硼氢化方法开发了一条新的蜕皮类固醇前体途径。3,3-(乙撑二氧基)-胆甾醇-5,7-二烯的氢硼化(分两步从7-脱氢胆固醇中),然后用碱性过氧化氢氧化,生成3,3-(乙撑二氧基)-5β-胆甾醇7- en-6β-ol(与7-脱氢胆固醇的相同反应仅产生5α-醇(OH-6α),从而阻止了5β-类固醇的合成)。