Novel Synthesis of Pyrido[2,1-<i>a</i>]isoindoles via a Three-Component
Assembly Involving Benzynes
作者:Yuhong Zhang、Chunsong Xie、Peixin Xu
DOI:10.1055/s-0028-1087417
日期:——
A novel three-component assembly involving benzynes has beendeveloped for the synthesis of pyrido[2,1- A]isoindolesin moderate yields. Reaction conditions have been optimized andthe scope of the reaction has been studied. A plausible mechanismhas been proposed to account for the three-component reaction.
AbstractA synthesis of pyrido[2,1‐a]isoindoles is reported by the rhodium‐catalyzed direct oxidative CH acylation of 2‐aryl pyridines with terminal alkynes. The desired products were obtained in moderate to excellent yields. This is an efficient and clean method to construct CC/CN bonds in one step. In addition, the effective rhodium(III) catalyst was isolated and characterized by X‐ray crystallography.magnified image
Selective C–C bond formation from rhodium-catalyzed C–H activation reaction of 2-arylpyridines with 3-aryl-2<i>H</i>-azirines
作者:Yonghyeon Baek、Jinwoo Kim、Hyunseok Kim Hyunseok Kim、Seung Jin Jung、Ho Ryu、Suyeon Kim、Jeong-Yu Son、Kyusik Um、Sang Hoon Han、Hyung Jin Seo、Juyoung Heo、Kooyeon Lee、Mu-Hyun Baik、Phil Ho Lee
DOI:10.1039/c8sc05142a
日期:——
coupling. Computational studies quickly revealed and prototype experimental work confirmed that neither the formation of the expected metal nitrene complexes nor the C–N coupling were viable. Instead, azirine ring-opening followed by C–C coupling was found to be much more favorable to give imines that readily underwent hydrolysis in aqueous conditions to form acylmethyl-substituted products. This new method