Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 36, Pages 12502-12506Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201906754
Keywords
asymmetric catalysis; cycloaddition; cyclopropenes; diaziridines; metal carbene species
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Funding
- U.S. National Science Foundation [CHE-1625963]
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A chiral copper(I) complex catalyzes reactions of symmetric diaziridines with enol diazo compounds, which react through N-N bond ring opening in a formal [3+3] cycloaddition to form four chiral centers with high stereocontrol. A broad spectrum of bridged dinitrogen heterocycles were obtained in high yields and excellent diastereo- and enantioselectivities from gamma-substituted enol diazoacetates, while their geometrical isomers gave different enantioselectivities. Donor-acceptor cyclopropenes formed from the geometrical isomers of the gamma-substituted enol diazoacetates underwent catalytic ring opening to give only the Z isomer of the metalloenolcarbene intermediate, provided excellent yields and selectivities for the 1,5-diazabicyclo[n.3.1]non-2-ene derivatives.
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