Tw. Mackewitz et al., ORGANOPHOSPHORUS COMPOUNDS .102. ACID-INDUCED CYCLOTRIMERIZATION OF APHOSPHAALKYNE WITH FORMAL INCORPORATION OF WATER, Heteroatom chemistry, 6(6), 1995, pp. 617-621
tert-Butylphosphaacetylene 1 can be cyclotrimerized with incorporation
of water to furnish the 1,2,4-triphosphabicyclo[2.1.1]hex-2-ene 5 in
the presence of trifluoroacetic acid. This novel bicyclic system has b
een fully characterized by spectral and analytical data. The constitut
ion of 5 has been unambiguously demonstrated by X-ray crystallography.
(C) 1996 John Wiley & Sons, Inc.