Journal
RSC ADVANCES
Volume 4, Issue 80, Pages 42299-42307Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra06938b
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Funding
- CSIR, New Delhi
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A highly efficient asymmetric cascade reaction namely Michael-hemiketalization of 5-hydroxy-2-methyl-4H-pyran-4one to beta,gamma-unsaturated alpha-ketoesters has been developed using a chiral bifunctional rosin-indane amine thiourea catalyst. The products are obtained in excellent yields with a high degree of enantiomeric excess (up to 99% ee), in a short reaction time with low catalyst loading of 2.5 mol%.
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