作者:Mani Ramanathan、Duen-Ren Hou
DOI:10.1016/j.tetlet.2010.09.065
日期:2010.11
Triphenylphosphine hydrobromide was found to cleave the benzyl ethers derived from 1°, 2° alkyl, and aryl alcohols to the corresponding alcohols and benzyltriphenylphosphonium bromide in good yields. Alkene and allyl phosphonium salts were produced from the benzyl ethers with 3° alkyl and allyl groups, respectively. These results indicate that the formation of the product is determined by the relative
发现三苯基膦氢溴酸盐以良好的产率将衍生自1°,2°烷基和芳基醇的苄基醚裂解为相应的醇和苄基三苯基溴化phosph。分别由具有3°烷基和烯丙基的苄基醚制备烯烃和烯丙基phospho盐。这些结果表明产物的形成取决于碳阳离子中间体的相对稳定性。化学计量的无水PPh 3 ·HBr为苄醚的脱保护提供了一种新的有效方法。