title: Lewis acid promoted phenylseleno group transfer tandem radical cyclization reactions.
abstract: [reaction: see text] A new Lewis acid promoted phenylseleno group transfer tandem radical cyclization method was developed. In the presence of Lewis acids such as Yb(OTf)3 or Mg(ClO4)2, under photolysis condition at low temperature (-45 degrees C), various unsaturated alpha-phenylseleno beta-keto amides underwent radical cyclization reactions to give monocyclic or bicyclic products in a highly efficient, regioselective, and stereoselective manner.
authors.affiliation: Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China. yangdan@hku.hk
authors.forename: Dan
authors.initials: D
authors.lastname: Yang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gao
authors.forename: On-Yi
authors.initials: OY
authors.lastname: Lee