Light, metal‐free regioselective<scp>C<sup>6</sup>‐H</scp>alkylation of purines and purine nucleosides with alcohols
作者:Xiguang Liu、Xiangbin Sun、Weili Wang、Miao Tian、Yiwen Chen、Chunhui Zou、Mingwu Yu
DOI:10.1002/jhet.4659
日期:2023.7
A metal-, light-free radical alkylation reaction of purines and nucleosides has been achieved with readily available alcohols (1°, 2°, 3°) as the alkyl radical sources enabled by oxalates, which does not need any catalysts, N2 protection, and protecting groups. Although there are three potential active C(sp2)H bonds and four interferential nitrogen atoms in the purine motif, the reaction still shows
以草酸盐为烷基自由基源,以易得的醇(1°、2°、3°)实现了嘌呤和核苷的金属、光自由基烷基化反应,不需要任何催化剂、N 2保护和保护基团。尽管嘌呤基序中存在3个潜在的活性C( sp 2 ) H键和4个干扰氮原子,但该反应在C 6 H位上仍然表现出优异的区域选择性,并且不存在多烷基化问题。此外,该方法表现出广泛的功能组耐受性,并且可扩展至克级,可应用于后期 C 嘌呤的 H 烷基化合成具有抗 CEM 活性的 6-环戊基星云碱,从而证明了其实用性。