Zwitterionic Ring-Opened Oxyphosphonium Species from the Ph<sub>3</sub>P–I<sub>2</sub> Mediated Reactions of Benzo[<i>d</i>]oxazol-2(3<i>H</i>)-ones with Secondary Amines
Ph3P-I2-mediated reactions of benzo[d]oxazol-2(3H)-ones with acyclic secondary amines. The structure of one of these compounds was unambiguously confirmed by single-crystal X-ray analysis. Thermolysis of the betaines gave rise to 2-dialkylaminobenzoxazoles with concomitant loss of triphenylphosphine oxide, suggesting their possible role as intermediates in an alternative reaction path.