期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 355, 期 17, 页码 3344-3350出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201300583
关键词
asymmetric [4+2]annulations; but-3-yn-2-one; Cinchona alkaloids; isatins; spiro[indoline-3,2 '-pyran]s
资金
- Shanghai Municipal Committee of Science and Technology [11JC1402600]
- National Basic Research Program of China (973) [2010CB833302]
- National Natural Science Foundation of China [21102166, 21072206, 20472096, 20872162, 20672127, 21121062, 20732008]
The catalytic asymmetric [4+2]annulations of isatins with but-3-yn-2-one catalyzed by the Cinchona alkaloids-derived oragnocatalyst (DHQD)(2)PHAL have been developed in the presence of 3.0equivalents of D-diethyl tartrate in the mixed solvent (diphenyl ether/diethyl ether=1/1) or a slightly modified one, affording the corresponding substituted spiro[indoline-3,2-pyran]-2,4(3H)-diones in good to excellent yields with high enantioselectivities under mild conditions.
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