Trimethylsilylated 1,3-dienes or styrenes from the reaction between trimethylsilyldiazomethane and vinyl or aryl ketenes

Article abstract of DOI:10.1016/S0040-4039(98)02536-2

The reaction between trimethylsilyldiazomethane and aryl or vinyl ketenes 2 and 7, bearing an electron withdrawing group on the ketene moiety, gave rise in moderate to good yields to the trimethylsilylated styrenes 3-5 or 1,3 dienes 8a-d resulting from the decarbonylation of presumed intermediate cyclopropanones.