Journal
ACS CATALYSIS
Volume 2, Issue 8, Pages 1535-1538Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs300313j
Keywords
2-amino-4H-chromenes; organocatalysis; conjugate addition; nitroalkane
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Funding
- National University of Singapore under MOE AcRF FRC [R-143-000-480-112, R-143-000-443-112, NRF-CRP7-2010-03]
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We disclose a new efficient enantioselective organocatalytic conjugate addition method for the preparation of 2-amino-4H-chromenes in high to excellent yields (75-95%) and with high to excellent enantioselectivities (86-97% ee). It is noteworthy that the 2-iminochromene was first disclosed as an active electrophile.
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