Amination of Diazocarbonyl Compounds: N–H Insertion under Metal-Free Conditions
作者:Xuesong Luo、Gui Chen、Lin He、Xueliang Huang
DOI:10.1021/acs.joc.6b00233
日期:2016.4.1
Transition-metal-free intermolecular N–H insertion of α-diazocarbonyl compounds is reported. Among the series of nitrogen sources examined, dibenzenesulfonimide was found to be the choice in terms of the yields and the reaction time. Primary mechanistic experiments suggest that a pathway involving a sequence of protonation and nucleophilic substitution was preferred.
Carbene Bridging C-H Activation: Facile Isocoumarin Synthesis Through Palladium-Catalyzed Reaction of 2-Pseudohalobenzaldehydes with Aryl Diazoesters
作者:Chao Yan、Yinghua Yu、Bo Peng、Xueliang Huang
DOI:10.1002/ejoc.201901738
日期:2020.2.14
A strategy based on carbene bridging C–H activation is described. The bridging arm is generated via migratory insertion of a palladium carbene intermediate. Through this distinct pathway, a variety of isocoumarins could be prepared in a modular manner.
Photocatalyzed Dual Strain Release of [1.1.1]Propellane with Diazo Compounds
作者:Jiahao Hu、Xiaobin Yuan、Yufei Li、Xiaoyu Chen、Zaicheng Nie、Mong-Feng Chiou、Yajun Li、Hongli Bao
DOI:10.1021/acscatal.4c00533
日期:2024.4.19
L-menthol, metronidazole, and geraniol, can be applied to these transformations. Importantly, this method allows the cleavage and formation of multiple C–C bonds in a photocatalyzed tandem intersystem crossing (ISC)/radical ring-opening/radical–radical recombination process, and the products can be easily transformed into synthetically challenging spiro compounds, such as spiro [2.3] and spiro [3.4] compounds