Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 4, Pages 1460-1464Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201509110
Keywords
asymmetric catalysis; conjugation; organocatalysis; quinones; sulfur
Categories
Funding
- 973 Program [2012CB821600]
- NSFC [21390400, 21421062, 21172112, 21172118]
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An asymmetric 1,6-conjugate addition of thioacetic acid with para-quinone methides has been developed by using chiral phosphoric acid catalysis in the presence of water. A series of sulfur-containing compounds were thus obtained in high yields with good to excellent enantioselectivities. Theoretical studies indicated that the water-bridged proton transfer is a potentially favorable reaction pathway. An unprecedented O-H center dot center dot center dot pi interaction between water and the aromatic nucleus of chiral phosphoric acid was discovered to contribute significantly to the stereocontrol in the catalysis.
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