期刊
ORGANIC LETTERS
卷 18, 期 6, 页码 1354-1357出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b00287
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资金
- Indo-French Centre for Promotion of Advanced Research (IFCPAR), New Delhi [IFC/4803-4]
- Council of Scientific & Industrial Research (CSIR)
A new bifunctional squaramide organocatalyst derived from L-proline mediated the first enantioselective synthesis of dihydrospiro[indoline-3,4'-pyrano [2,3-c]pyrazole] derivatives in excellent enantioselectivity by reacting pyrazolones with isatylidine beta,gamma-unsaturated alpha-ketoester. This new catalyst outperformed widely used thioureas and squaramides in inducing enantioselectivity.
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