Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 14, Issue 6, Pages 1946-1949Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ob02559a
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Funding
- National Natural Science Foundation of China [21372217, 21572223, 21572224]
- CAS western light program
- Sichuan Youth Science and Technology Foundation [2013JQ0021, 2015JQ0041]
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A base-mediated Neber reaction of enaminopyrazolones, which are the tautomers of 4-acyloxime-2-pyrazolin-5-ones, with sulfonyl chlorides was achieved. With this developed approach, a range of spiro-fused 2H-azirine-pyrazolones were obtained in good yields under mild conditions. A preliminary trial of a catalytic asymmetric version of the Neber reaction was conducted and gave promising enantioselectivity.
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