Reductive opening of phenyl substituted thiacycloalkanes: New way for sulphur-containing organolithium compounds
作者:Juan Almena、Francisco Foubelo、Miguel Yus
DOI:10.1016/s0040-4020(97)00211-1
日期:1997.4
The reaction of 2-phenyl substituted four, five and six membered thiacycloalkanes (1, 4 and 7) with lithium and a catalytic amount of DTBB (5 mol %) in THF at −78°C leads to the corresponding sulphur-containing benzylic organolithium compounds (2, 5 and 8), which by reaction with different electrophiles [D2O, Me3SiCl, ButCHO, Me2CO, Et2CO, (CH2)4CO, CO2] followed by hydrolysis with water afford the
在-78°C下,2-苯基取代的四元,五元和六元硫代环烷烃(1、4和7)与锂和催化量的DTBB(5摩尔%)在THF中的反应生成相应的含硫苄基有机锂化合物(2,5和8),其通过与不同的亲电子[d反应2 O,我3的SiCl,卜吨CHO中,Me 2 CO,等2 CO,(CH 2)4 CO,CO 2 ]接着用水解可以提供预期的功能化硫醇(3、6和9))以区域选择性方式进行。一些反应产物(3、6)在酸性条件(85%磷酸)下环化,以产生相应的同源取代的含硫饱和杂环(10、11)。