期刊
ORGANIC LETTERS
卷 22, 期 3, 页码 1028-1033出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.9b04571
关键词
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资金
- NSFC [21632003, 21871116, 21572087]
- key program of Gansu province [17ZD2GC011]
- 111 program from the MOE of P.R. China
- Syngenta Company
A series of novel biselectrophilic beta,gamma-unsaturated alpha-ketoesters were designed and synthesized from rhodanine. Under the catalysis of chiral squaramides, the enantioselective [3 + 3] annulation reaction of these novel ketoesters with pyrazolones was developed. This reaction offers an efficient method for the synthesis of chiral 2'-thioxo-5,6-dihydrospiro [pyrano [2,3-c]pyrazole-4,5'-thiazolidin]-4'-ones.
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