期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 16, 期 35, 页码 6470-6478出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ob01588k
关键词
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资金
- UGC-BSR
- SERB, India [EMR/2016/002193]
- Department of Science and Technology (DST), India under the FIST programme
- UGC, India [25-1/2014-15(BSR)/5-27/2007]
The bifunctional nature of the cinchonidine squaramides has been successfully employed to catalyze the enantioselective 1,4-Michael addition reaction of pyrazolin-5-ones with 2-enoylpyridines under mild reaction conditions. Through this methodology, a broad range of optically active heterocyclic derivatives bearing both pyrazole and pyridine motifs have been synthesized in yields up to 88% and enantiomeric excess up to 96%.
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