Deallyloxy- and debenzyloxycarbonylation of protected alcohols, amines and thiols via a naphthalene-catalysed lithiation reaction
作者:Cherif Behloul、David Guijarro、Miguel Yus
DOI:10.1016/j.tet.2005.07.055
日期:2005.9
and Cbz-protected alcohols, amines and thiols in THF at 0 °C led, after quenching with methanol, to the recovery of the free alcohols, amines and thiols in short reaction times and with very good yields. The selectivity for the removal of the Alloc- or the Cbz- group in a polyfunctionalised substrate has been studied. The selective reductive cleavage of a benzylic carbon–oxygen bond was achieved in the
在甲醇下淬灭后,萘在0°C下由萘和Cbz保护的醇,胺和硫醇在萘中催化的锂化反应,导致在较短的反应时间内以非常高的收率回收了游离的醇,胺和硫醇。 。已经研究了在多官能化底物中去除Alloc-或Cbz-基团的选择性。在烯丙基碳-氧或碳-氮键的存在下,实现了苄基碳-氧键的选择性还原裂解。与先前报道的通过溶解金属的脱保护方法相比,该方法代表了很大的改进,因为它避免了使用有毒的液态氨,因此避免了在低温下进行反应的需要。