G. Alcaraz et al., SYNTHESIS AND EVOLUTION OF PHOSPHANYLCARBENE BORANE ADDUCTS, Journal of the Chemical Society, Chemical Communications, (17), 1993, pp. 1354-1355
Photolysis of hexylamino)phosphanyl](trimethylsilyl)diazomethane leads
to the corresponding stable carbene 1b, which reacts with triethylbor
ane affording a borane-carbene adduct 2b, characterized by spectroscop
y in solution before rearrangement and fragmentation into ohexylamino-
C-(ethyl)(trimethylsilyl)phosphaalkene 3b; trimethylsilyltrifluorometh
anesulfonate adds to lb giving the methylenephosphonium 4b.