ABSTRACT: Potassium-tert-butoxide is recommended for ge- neral use in Wittig reactions with nonstabilized ylides. High yield methylenationsofcyclohexanone andaseries of five sterically hindered ketones demonstrate its utility. ... When choosing a base for the ylide-forming step of the ... (1) alkyllithium compounds may give rise to an attack on ... It therefore seems obvious that potassium-containing ba- ... Potassium-tert-butoxide has long been known to accele-
