Journal
TETRAHEDRON LETTERS
Volume 56, Issue 29, Pages 4334-4338Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2015.05.076
Keywords
2-Amino-4H-chromenes; o-Quinone methides; 2-(1-Tosylalkyl)phenols
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Funding
- National Natural Science Foundation of China [21125208, 21372220]
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An efficient bifunctional squaramide-catalyzed Michael addition/cyclization reaction of o-quinone methides generated in situ from 2-(1-tosylalkyl)phenols with active methylene compounds bearing a cyano group has been realized to synthesize chiral 2-amino-4H-chromenes with excellent enantioselectivities and broad substrate scope. (c) 2015 Elsevier Ltd. All rights reserved.
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