A phosphine-catalysed one-pot domino sequence to access cyclopentene-fused coumarins
作者:Yan-Shan Chen、Yu Zheng、Zhi-Jun Chen、Zhen-Zhen Xie、Xian-Chen He、Jun-An Xiao、Kai Chen、Hao-Yue Xiang、Hua Yang
DOI:10.1039/d1ob01143j
日期:——
A novel phosphine-catalysed, one-potdomino approach for the annulation of 2-formylphenyl alkynoates with activated methylene compounds to construct various cyclopentene-fused dihydrocoumarins is reported. This developed strategy provides a facile and efficient approach for the synthesis of structurally complex coumarins from inexpensive and readily available alkynoates.
Control of Chemoselectivity by Counteranions of Cationic Palladium Complexes: A Convenient Enantioselective Synthesis of Dihydrocoumarins
作者:Xiuling Han、Xiyan Lu
DOI:10.1021/ol902538n
日期:2010.1.1
High chemoselectivity for the synthesis of two kinds of substituted coumarins controlled by the counteranions of the cationic palladium catalysts is described. The asymmetric version of the reaction for the synthesis of 3-alkylldene dihydrocoumarins is realized with high enantioselectivity.