Metal-free, direct acylation of purines to access C<sup>6</sup>-acylated purine derivatives induced by TBHP <i>via</i> Minisci-type reaction
作者:Chunhui Zou、Mingwu Yu、Zhongkai Jiang、Xiguang Liu、Yiwen Chen、Lele Zhang
DOI:10.1039/d3nj05712g
日期:——
A metal-free C–H functionalization of purines with aldehydes was developed to access C6-acylated purines via green radical reactions. Theoretically, there are many competitive reactions due to the three C–H bonds (C2–H, C6–H, C8–H) in the purine, and the acylation only happens at the purinyl C6-position. This method avoids a metal catalyst and provides a green approach to construct C–C (sp2) bonds
开发了一种用醛对嘌呤进行无金属 C-H 官能化的方法,以通过绿色自由基反应获得 C 6 -酰化嘌呤。理论上,由于嘌呤中的三个C-H键(C 2 -H、C 6 -H、C 8 -H),存在多种竞争反应,酰化仅发生在嘌呤基C 6位。该方法避免了金属催化剂,提供了一种在嘌呤基C 6位构建C-C (sp 2 )键的绿色方法,同时保持与各种官能团的优异相容性。此外,该协议具有广泛的底物范围和易于放大的特点。产品的转化证明了该方法具有显着的实用价值。主要机制是根据对照实验提出的。