Enantioselective Nucleophilic Addition of Trimethylsilylacetylene to N-Phosphinoylimines Promoted by C2-Symmetric Proline-Derived beta-Amino Alcohol

the National Natural Science Foundation of China (nos. 20525206;20772052;90813012;20621091);the National S & T Major Project of China (2009ZX09503-017);the Chang Jiang Program of the Ministry of Education of China