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Preparation of Allenephosphoramide and Its Utility in the Preparation of 4,9-Dihydro-2H-benzo[f]isoindoles

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posted on 04.03.2011, 00:00 by Guangwei Yin, Yuanxun Zhu, Li Zhang, Ping Lu, Yanguang Wang
Allenephosphoramides were prepared from propargyl alcohols and diethyl arylphosphoramides using Yb(OTf)3 as catalyst. In the presence of iodine, 4,9-dihydro-2H-benzo[f]isoindole derivatives could be efficiently constructed from the same two starting materials in a single step.