期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 16, 页码 6011-6020出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja500382c
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资金
- Nanyang Technological University
- Singapore Ministry of Education [MOE2012-T2-1-014]
A method for synthesis of 3-azabicyclo[3.1.0]hex-2-enes has been developed by intramolecular cyclopropanation of readily available N-allyl enamine carboxylates. Two complementary reaction conditions, CuBr-mediated aerobic and CuBr2-catalyzed-PhIO2-mediated systems effectively induced stepwise cyclopropanation via carbocupration of alkenes. Oxidative cyclopropane ring-opening of 5-substituted 3-azabicyclo[3.1.0]hex-2-enes was also developed for synthesis of highly substituted pyridines. In addition, diastereoselective reduction of 3-azabicyclo[3.1.0]hex-2-enes to 3-azabicyclo[3.1.0]hexanes was achieved using NaBH3CN in the presence of acetic acid.
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