Journal
ORGANIC LETTERS
Volume 15, Issue 6, Pages 1190-1193Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol400025a
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Funding
- National Natural Science Foundation of China [21272024]
- Science and Technology Innovation Program of Beijing Institute of Technology [2011CX01008]
- Development Program for Distinguished Young and Middle-Aged Teachers of Beijing Institute of Technology
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An efficient asymmetric cascade sulfa-Michael/Michael addition reaction catalyzed by a chiral bifunctional squaramide-tertiary amine catalyst has been developed. This organocatalytic cascade reaction provides easy access to highly functionalized chromans with three contiguous stereocenters, including one quaternary center. In addition, a novel cascade sulfa Michael/retro-sulfa-Michael/sulfa-Michael/Michael reaction process, Involving dynamic kinetic resolution, is described.
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