Preparation and synthetic applications of lithiated vinyl sulfones derived from 3-buten-1-ol and 4-penten-1-ol
作者:Francisco Caturla、Carmen Nájera
DOI:10.1016/s0040-4020(97)00725-4
日期:1997.8
Vinyl sulfones (E)-4-tosyl-3-buten-1-ol (2) and its MOM-derivative 6, prepared by iodosulfonylation-dehydroiodination of 3-buten-1-ol (1), are regio and stereoselectively lithiated at the 4-position to afford intermediates 3 and 7, respectively. The protected derivative 7 can be alkylated and acylated at the vinylic position and both intermediates can also react with carbonyl compounds to give 1,5-diols
通过3-丁烯-1-醇(1)的碘磺酰化-脱氢碘化反应制备的乙烯基砜(E)-4-甲苯磺酰基-3-丁烯-1-醇(2)及其MOM衍生物6在4-位上分别得到中间体3和7。被保护的衍生物7可以在乙烯基位置被烷基化和酰化,并且两个中间体也可以与羰基化合物反应以产生1,5-二醇,其环化成相应的二氢吡喃9。(E)-5-甲苯磺酰基-4-戊烯-1-醇(16)的MOM衍生物,通过保护同源的4-戊烯-1-醇(14)获得),然后进行碘磺酰化-脱氢碘化,在5位区域进行区域选择性立体锂化,提供单阴离子17,单阴离子17在该位置与亲电试剂反应,提供产物18。研究了代表性的所得产物18的环化和脱磺酰化反应。