Full Length ArticleSynthesis of fluorinated 3-Pyrroline (cas 109-96-6)s and pyrroles via [3 + 2] annulation of N-aryl fluorinated imines with allenoates catalyzed by phosphine

Add time:08/20/2019    Source:sciencedirect.com

A phosphine-catalyzed [3 + 2] annulation of N-aryl fluorinated imines with allenoates is reported. A series of fluorinated pyrrolines is obtained in moderate yield, which are further transformed to fluorinated pyrroles via dehydro-aromatization by DDQ in high to excellent yield. The reaction mechanism is also discussed.

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