A catalytic method for chemoselective detritylation of 5′-tritylated nucleosides under mild and heterogeneous conditions using silica sulfuric acid as a recyclable catalyst
作者:Ali Khalafi-Nezhad、Abolfath Parhami、Mohammad Navid Soltani Rad、Mohammad Ali Zolfigol、Abdolkarim Zare
DOI:10.1016/j.tetlet.2007.05.153
日期:2007.7
A rapid, mild and highly efficient procedure for the chemoselective deprotection of triphenylmethyl (trityl, Tr), p-anisyldiphenylmethyl (monomethoxytrityl, MMT) and di-(p-anisyl)phenylmethyl (dimethoxytrityl, DMT) groups from nucleoside trityl ethers has been established. The deprotection was achieved at room temperature, using a catalytic amount of silica sulfuric acid (SSA) in acetonitrile. The
已经建立了一种快速,温和且高效的方法,用于从核苷三苯甲基醚中化学选择脱保护三苯基甲基(三苯甲基,Tr),对-茴香基二苯基甲基(单甲氧基三苯甲基,MMT)和二(对茴香基)苯基甲基(二甲氧基三苯甲基,DMT)基团。 。脱保护在室温下进行,使用催化量的乙腈中的二氧化硅硫酸(SSA)。三苯甲基核苷无需任何纯化即可在2-17分钟内脱保护。这些条件与其他对酸敏感的羟基保护基团相容,例如对-甲氧基苄基(PMB),异亚丙基,环己叉基,二-(对-茴香基)亚甲基,三异丙基甲硅烷基(TIPS)和叔丁基二甲基甲硅烷基(TBDMS)。