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7702306 
Journal Article 
SYNTHESIS OF 2,3-DIHYDROBENZO[B] FURANS BY [3+2] ADDITION OF RHO-BENZOQUINONES WITH ALKENES IN LITHIUM PERCHLORATE DIETHYL-ETHER 
Asano, J; Ryu, Y; Chiba, K; Tada, M 
1995 
ROYAL SOC CHEMISTRY 
CAMBRIDGE 
4 
124-125 
WOS:A1995QV59500007 
p-Benzoquinones react with alkenes in a 5 M solution of LiClO4 in diethyl ether at room temperature to give [3 + 2] addition products, 2,3-dihydrobenzofurans, with regio- and stereo-selectivity and in moderate yield.