Cumulated Ylides, VI: A New Synthesis of (Triphenylphosphoranylidene)keten, its Thio Analogue, and Stable Propadienylidenetriphenylphosphoranes
Reaction of sodium bis(trimethylsilyl)amide (2) with (methoxycarbonylmethylene)triphenylphosphorane (1a) or its dithio analogue 1b leads to β-elimination and formation of (triphenylphosphoranylidene)ketene (3a) and -thioketene (3b), respectively.The analo
Bestmann, Hans Juergen,Sandmeier, Dieter
p. 274 - 277
(2007/10/02)
Cumulated Ylides, IX. New Synthesis of N-substituted (Triphenylphosphoranylidene)ketenimines and (Triphenylphosphoranylidene)thioketene
Methylenetriphenylphosphorane (1) and isocyanidedichlorides resp. thiophosgene react in the molar ratio 3:1 to give N-substituted (triphenylphosphoranylidene)ketenimines 6A resp. (triphenylphosphoranylidene)thioketene 6B and methyltriphenylphosphonium chloride.The P-Cα-coupling constants in the 13C-NMR-spectra of 6 are in agreement with theoretical calculations.
Bestmann, Hans Juergen,Schmid, Guenter
p. 3369 - 3372
(2007/10/02)
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