Influence of theN3-Protection Group onN1- vs.O2-Alkylation in the Mitsunobu Reaction
作者:Olaf R. Ludek、Chris Meier
DOI:10.1002/ejoc.200500801
日期:2006.2
The influence of the N3-protection group of thymine on the regioselectivity of the N1- vs. O2-alkylation under Mitsunobu conditions is described. A series of N3-protected thymine derivatives 8a–f was prepared and coupled to cyclopentanol as model compound for carbocyclic nucleoside precursors. Finally, the N3-BOM group was selected to improve our previously reported synthetic strategy to carbocyclic
描述了在 Mitsunobu 条件下胸腺嘧啶的 N3-保护基团对 N1-与 O2-烷基化的区域选择性的影响。制备了一系列 N3 保护的胸腺嘧啶衍生物 8a-f,并与环戊醇偶联作为碳环核苷前体的模型化合物。最后,选择 N3-BOM 组来改进我们之前报道的碳环胸苷 (carba-dT) 合成策略。此外,2,6-二甲基-Bz 基团专门导致了carba-dT 的O2-类似物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)