Journal
SYNLETT
Volume 30, Issue 14, Pages 1662-1666Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0037-1610716
Keywords
asymmetric synthesis; lactonization; organocatalysis; regioselectivity-; sulfides
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Funding
- Japan Society for the Promotion of Science (JSPS) (KAKENHI) [JP19K05480]
- Cooperative Research Program of 'Network Joint Research Center for Materials and Devices' [20191310]
- Tokuyama Science Foundation
- Takahashi Industrial and Economic Research Foundation
- Shorai Foundation for Science and Technology
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Highly regioselective 5- exo bromolactonizations of stilbene-type carboxylic acids bearing electron-withdrawing substituents are achieved for the first time via the use of chiral bifunctional sulfide catalysts possessing a urea moiety. The chiral phthalide products are obtained in moderate to good enantioselectivities as the result of 5-exo cyclizations.
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