Synthesis of [a]annulated carbazoles from indol-2,3-dione
摘要:
Reaction of ethyl chloroformate with 3-aroylmethylindol-2(3H)-ones 5 affords the ethyl 3-[(2-aryl-2-ethoxycarbonyloxy)ethenyl]-2-(ethoxycarbonyloxy)indole-1-carboxylates 6 from which the corresponding [a]annulated carbazoles 10 are obtained via 6pi-electrocyclization.
N-heterocyclic carbene-catalyzed synthesis of spirocyclopentene-oxindoles from bromoenals
作者:Zhao-Fei Zhang、Kun-Quan Chen、Chun-Lin Zhang、Song Ye
DOI:10.1039/c6cc10304a
日期:——
Spirocyclopentene-oxindoles were synthesized in good yields with good diastereo- and enantioselectivities via the N-heterocycliccarbene-catalyzed reaction of bromoenals and oxindoles.
Palladium-Catalyzed Three-Component Cascade Reaction of Nitriles: Synthesis of 2-Arylquinoline-4-carboxylates
作者:Zhiwei Zhao、Ge Zeng、Yinan Chen、Jinming Zheng、Zhongyan Chen、Yinlin Shao、Fangjun Zhang、Jiuxi Chen、Renhao Li
DOI:10.1021/acs.orglett.1c02962
日期:2021.10.15
A new method for converting easy availability starting materials 2-(2-oxoindolin-3-yl)acetonitrile, arylboronic acids, and alcohols into 2-arylquinoline-4-carboxylates is reported. The procedure involves a three-component addition/ring expansion/esterification reaction in the presence of Pd(II) catalyst with high functional group tolerance under mild conditions. In addition, the photophysical properties