The reaction of [(dichlorophosphino)methyl]tris(dimethylamino)phosphonium tetraphenylborate 5 with an excess of 1,4-diazobicyclo[2.2.2]octane (DABCO) yields the new phosphonio-substituted phosphaalkyne, [(Me2N)3P–C![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/char_e007.gif)
P)+BPh4–6, which is trapped by secondary amines, phenols and mesityl azide.
U. Fleischer, H. Grützmacher and U. Krüger, J. Chem. Soc., Chem. Commun., 1991, 302 DOI: 10.1039/C39910000302
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