Photoinduced C(sp<sup>3</sup>)–H Chalcogenation of Amide Derivatives and Ethers via Ligand-to-Metal Charge-Transfer
作者:Ben Niu、Krishnakumar Sachidanandan、Maria Victoria Cooke、Taylor E. Casey、Sébastien Laulhé
DOI:10.1021/acs.orglett.2c01505
日期:2022.7.1
A photoinduced, iron(III) chloride-catalyzed C–H activation of N-methyl amides and ethers leads to the formation of C–S and C–Se bonds via a ligand-to-metal charge transfer (LMCT) process. This methodology converts secondary and tertiary amides, sulfonamides, and carbamates into the corresponding amido-N,S-acetal derivatives in good yields. Mechanistic work revealed that this transformation proceeds
N-甲基酰胺和醚的光诱导、氯化铁(III)催化的C-H活化导致通过配体到金属电荷转移(LMCT)过程形成C-S和C-Se键。该方法以良好的收率将仲酰胺和叔酰胺、磺酰胺和氨基甲酸酯转化为相应的酰胺基-N,S-缩醛衍生物。机理工作表明,这种转变是通过涉及氯自由基中间体的氢原子转移(HAT)进行的。