Three-Component Coupling Reactions of Arynes for the Synthesis of Benzofurans and Coumarins
作者:Eito Yoshioka、Shigeru Kohtani、Hideto Miyabe
DOI:10.3390/molecules19010863
日期:——
The domino three-component coupling reaction of arynes with DMF and active methylenes or methines was studied as a highly efficient method for preparing heterocycles. Coumarinderivative 5 was formed when diethylmalonate (2) or α-bromomalonate (3) were used as a C2-unit. In contrast, dihydrobenzofurans 7a and 7b were obtained by using α-chloroenolates generated from α-chloromalonates 4a and 4b and