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Abstract:
In the presence of cinchona-thiourea organocatalyst C1, the developed organocatalytic three-component cascade reaction of isatins, malononitrile, and 2-hydroxynaphthalene-1,4-diones readily proceeded to furnish chiral pyranonaphthoquinone-fused spirooxindoles in excellent chemical yields and high enantioselectivities (up to 99% yield and 97%ee). The absolute configurations of the spirooxindoles were assigned on the basis of an X-ray single crystal structure. Moreover, a reaction mechanism is proposed that accounts for the stereocontrolled formation of the chiral spirooxindoles,.
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EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
ISSN: 1434-193X
Year: 2015
Issue: 15
Volume: 2015
Page: 3320-3326
2 . 8 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
ESI HC Threshold:253
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 29
SCOPUS Cited Count: 34
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 8
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