A visible light-mediated, decarboxylative, desulfonylative Smiles rearrangement for general arylethylamine syntheses
作者:David M. Whalley、Hung A. Duong、Michael F. Greaney
DOI:10.1039/d0cc05049k
日期:——
A decarboxylative, desulfonylative Smiles rearrangement is presented that employs activated-ester/energy transfer catalysis to decarboxylate β-amino acid derived starting materials at room-temperature under visible light irradiation. The radical Smiles rearrangement gives a range of biologically active arylethylamine products highly relevant to the pharmaceutical industry, chemical biology and materials
Regioselective and site-selectivefunctionalization of distal C–H bonds has remained a significant challenge over the last decades. Although covalently attached directing groups have been designed to help solve this puzzle, their profound impact on step economy significantly hinders the protocol’s applicability. Weak non-covalent interactions have been developed to overcome this, but they have mainly
在过去的几十年里,远端 C-H 键的区域选择性和位点选择性功能化仍然是一个重大挑战。尽管共价连接的指导基团旨在帮助解决这个难题,但它们对步骤经济的深远影响极大地阻碍了协议的适用性。已经开发出弱的非共价相互作用来克服这个问题,但它们主要是用 Ir 催化来探索的。在此,我们的目标是通过利用阴离子配体和中性底物之间的弱非共价相互作用,对简单胺进行 Pd 催化的间位选择性 C-H 官能化。催化量的有机盐作为高效元的合适配体-选择性C-H烯化。实验和计算研究表明,位点选择性受阴离子供体配体和中性基序之间关键的氢键相互作用控制。该协议可以进一步扩展到具有可变链接器长度的胺,概述了我们方法的多功能性和适用性,同时仅使用催化量的定向配体进行转化。