Dehydrochlorination of 3-chloro-2- or -3-alkenoyltrimethylsilanes with DBU affords the parent 2,3-butadienoyltrimethylsilane, as well as 4-monoalkyl- and 4,4-dialkyl homologues.
Synthesis of α-allenic aldehydes and allenyl trimethylsilyl ketones via (trimethylsilyloxy)butatrienes