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RADICAL CYCLIZATION OF O-HALOARYL ALLENYLMETHYL ETHERS AND AMINES - SYNTHESIS OF 3-ETHENYL-2,3-DIHYDROBENZOFURANS AND 3-ETHENYL-2,3-DIHYDROINDOLES
Date Issued
1994
Author(s)
BALASUBRAMANIAN, T
BALASUBRAMANIAN, KK
Abstract
o-Haloaryl allenylmethyl ethers and amines upon treatment with n-Bu3SnH and AIBN in refluxing benzene, underwent a 5-exo-trig free radical cyclisation to give the respective 3-ethenyl-2,3-dihydrobenzofurans and 3-ethenyl-2,3-dihydroindoles in good yields.