R. Streubel et al., 1,2-DIHYDRO-1,3-DIPHOSPHETES BY CYCLOCODIMERIZATION BETWEEN PHOSPHAALKYNES AND PHOSPHAALKENES, Bulletin de la Societe chimique de France, 130(5), 1993, pp. 642-646
Cycloaddition between 2-[isopropyl(trimethylsilyl)amino]phosphaacetyle
ne 1 and several P-halogenated phosphaalkenes XP=C(SiMe3)R 2a-c (2a :
X = Cl, R = SiMe3; 2b : X = Br, R = SiMe3; 2c : X = Cl, R = Ph) leads
to the corresponding 1,2-dihydro-1,3-diphosphetes 3a-c. Reaction of 3a
with iodotrimethylsilane afforded the iodine derivative 4. The thermo
lysis of 3a in presence of HMPT proceeds via elimination of chlorotrim
ethylsilane to yield the tricyclic zatetraphosphatricyclo[6.2.0.0(3,6)
]deca-3,8-diene 7, the X-ray structure of which is reported.