to these reaction conditions. The selective cleavage of allyl, p-bromobenzyl, and PMB ethers in protected carbohydrates containing DMPBn ethers are also demonstrated. This work establishes the 4-(3,4-dimethoxyphenyl)benzyl ether as an effective and robust alternative to p-methoxybenzyl as a protecting group for alcohols.
建立了在酸性条件下裂解4-(3,4-二
甲氧基苯基)苄基(D
MPBn)醚的可靠试剂体系。用TFA在无
水CH 2 Cl 2和3,4-(亚甲二氧基)
甲苯中作为阳离子清除剂处理D
MPBn保护的
单糖和假二糖,导致D
MPBn醚的选择性裂解,从而以中等至高收率得到相应的脱保护产物。报道了显示烯丙基,苄基和对
溴苄基醚,酯和糖苷键对这些反应条件稳定的实例。烯丙基,p的选择性裂解还证明了在含有D
MPBn醚的受保护
碳水化合物中的-
溴苄基和PMB醚。这项工作建立4-(3,4-二
甲氧基苯基)苄基醚作为有效和健壮的替代p甲氧基苄基作为醇的保护基。