作者:Nicolas Rival、Arantxa Albornoz Grados、Lucie Schiavo、Françoise Colobert、Gilles Hanquet
DOI:10.1016/j.tetlet.2015.10.067
日期:2015.12
A convenient and high yielding method for the cleavage and scavenging of p-methoxybenzyl protecting group of several alcohols using tert-butyl bromide in refluxing acetonitrile is described. Under these mild conditions other protecting groups such as acid sensitive allyl, benzyl, and Me3CPh2Si ethers, or isopropylidene acetals were unchanged. Interestingly, a selective alkoxy-PMB cleavage was observed
描述了一种方便且高产率的方法,该方法使用叔丁基溴化物在回流的乙腈中裂解和清除几种醇的对甲氧基苄基保护基。在这些温和的条件下,其他保护基(例如酸敏感的烯丙基,苄基和Me 3 CPh 2 Si醚或亚丙基缩醛)保持不变。有趣的是,在PMB苯氧基醚存在下观察到选择性烷氧基-PMB裂解。