Phosphine-catalyzed enantioselective [3+2] annulations of 2,3-butadienoates with imines
摘要：
The first systematic screening of chiral phosphines in the cycloaddition reaction between 2,3-butadienoates and arylimines has led to the identification of fairly efficient catalysts. 2-Aryl-3-pyrrolines have been obtained with enantiomeric excesses up to 64%. In one instance, the enantiomeric excess could be increased to 91% ee by combining the enantioselective cyclization reaction with a crystallization step.
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DOI：
10.1016/j.tetlet.2006.01.122
被引量：
年份：
2006
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