triphenylphosphoranylidene) acetates react exothermally to furnish the corresponding
alkenes. In certain cases, heating has to be provided externally. Reaction times are short
and yields are generally very high. Neat mixtures of ketones and alkyl (
triphenylphosphoranylidene) acetates react preferentially under microwave irradiation. The
better stabilized phosphoranes do not react in the solid state with aldehydes or ketones …