Yang D, Gao Q, Lee OY. Lewis acid promoted phenylseleno group transfer tandem radical cyclization reactions.
Org Lett 2002;
4:1239-41. [PMID:
11922828 DOI:
10.1021/ol025750n]
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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.
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