Silicon in organic synthesis. 23. Chloro[(trimethylsilyl)methyl]ketene as a useful intermediate for the elaboration of .alpha.-methylenecyclobutanones and -cyclopentanones
Silicon in organic synthesis. 23. Chloro[(trimethylsilyl)methyl]ketene as a useful intermediate for the elaboration of .alpha.-methylenecyclobutanones and -cyclopentanones