Jian-Bo Zhu, Haodong Chen, Lijia Wang
Sep 8, 2014
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Organic chemistry frontiers
Abstract
A facile approach for the synthesis of benzo[3.1.0]bicycloalkanes via alkylation/cyclopropanation cascade reactions of benzyl bromide with triphenylphosphonium bromide has been developed. By elaborate designing of starting materials, this multistep cyclization proceeded smoothly with a wide range of substrates, providing the benzo[3.1.0]bicycloalkanes in 52–90% yields with exclusive diastereoselectivity.