Journal
ORGANIC LETTERS
Volume 19, Issue 21, Pages 5717-5719Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.7b02694
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Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- Youth Innovation Promotion Association CAS [2017301]
- Start-up Research Fund of Nanjing Agricultural University [050-804099]
- Fundamental Research Funds for the Central Universities [KYTZ201604]
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The first enantioselective copper catalyzed cyclopropanation of internal olefins with diazomalonates is reported. This process provides a new method for the synthesis of chiral 1,1-cyclopropane diesters. With a chiral bi-side arm bisoxazoline copper(I) complex, the reaction performed well over a series of substrates, giving the desired products in good yields (up to 95%) and excellent enantioselectivities (90-95% ee).
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