N-Heterocyclic carbene catalyzed intramolecular nucleophilic addition of carbonyl anion equivalents to enol ethers

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PERGAMON-ELSEVIER SCIENCE LTD

1. Ministry of Education of China [20040730008]
2. NSFC [20572037]
3. Chinese ministry of Education [105169]
4. Gansu Science Foundation [3ZS051-A25-004]
5. [NCET-05-0879]