Dichlorocarbene reacted with sterically protected 1-phosphaallene and 1,3-diphosphaallene to give a methylene-phosphirane and a methylene-diphosphirane, respectively; the former phosphirane was converted to 1-phosphabutatriene with butyllithium and the structure of the latter diphosphirane was determined by X-ray crystallography.
M. Yoshifuji, K. Toyota, H. Yoshimura, K. Hirotsu and A. Okamoto, J. Chem. Soc., Chem. Commun., 1991, 124 DOI: 10.1039/C39910000124
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