Journal
ORGANIC LETTERS
Volume 21, Issue 5, Pages 1458-1462Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.9b00209
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Funding
- National Natural Science Foundation of China (NSFC) [21432011, 21772224]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- Science and Technology Commission of Shanghai Municipality [17JC1401200]
- NSFC/RGC Joint Research Scheme [21461162002]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SLH016]
- Natural Science Foundation of Shanghai [17ZR1436900]
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In the presence of 4 angstrom MS, both all-alkene [2 + 2 + 2] and [2 + 2] cyclizations of dimethyl methylenemalonate (DMM) with N-sulfonyl enamides were selectively achieved under In(OTf)(3) and Cu(OTf)(2) catalysis, respectively. In(OTf)(3)-catalyzed [4 + 2] cyclization of the sulfonylamidocyclobutanes with another molecule of DMM or other electron-deficient alkenes was also reported.
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