Insertion of Benzynes into the P=N Bond of P-Alkenyl(alkynyl)-lambda(5)-phosphazenes

[摘要]：Benzynes, generated from 2-(trimethylsilyl)phenyl triflates, have been found to react with P-Alkenyl-lambda(5)-phosphazenes via a formal pi-insertion into the P=N bond. A subsequent retro [2 + 2] cycloaddition/6 pi electrocyclization/protonation cascade explains the formation of the resulting 1, 4-benzazaphosphorinium trifiates. P-Alkynyi lambda(5)-phosphazenes and phosphane sulfides undergo similar transformations.

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