作者:Stéphanie Escoubet、Stéphane Gastaldi、Nicolas Vanthuyne、Gérard Gil、Didier Siri、Michèle P. Bertrand
DOI:10.1002/ejoc.200600120
日期:2006.7
Thiyl radical mediated reversible H abstraction from the stereogenic center α to the nitrogen atom is a mild method to racemize benzylic amines. Owing to the sensitivity of atom-transfer reactions to enthalpic effects, a knowledge of both the S–H and the α-C–H bond dissociation energies is fundamental to select the thiol that is appropriate to abstract the hydrogen atom from a given amine. In the absence
硫基自由基介导的从立体中心 α 到氮原子的可逆 H 提取是一种使苄胺外消旋的温和方法。由于原子转移反应对焓效应的敏感性,了解 S-H 和 α-C-H 键解离能是选择适合从给定胺中提取氢原子的硫醇的基础。在缺乏实验数据的情况下,理论计算提供了一种有用的预测工具。此处描述的实验有助于描述在化学计量或催化量的硫醇存在下外消旋化在合理时间内进行必须满足的最佳条件。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)