Chiral phosphine-mediated intramolecular [3 + 2] annulation: enhanced enantioselectivity by achiral Brønsted acid† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c7sc00952f Click here for additional data file.

Abstract

Department of Chemistry, National Univ Singapore 117543. E-mail: chmlyx@nus.edu Chemistry Department, King Fahd Univers 31261, Saudi Arabia. E-mail: nullah@kfupm School of Chemistry and Chemical Engine 400030, P. R. China. E-mail: lanyu@cqu.ed National University of Singapore (Suzhou) Suzhou Industrial Park, Suzhou, Jiangsu, 21 † Electronic supplementary… (More)

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