Palladium catalysed termolecular queuing cascades. Facile cyclisation-anion capture routes to heterocyclic dienes via allene insertion processes
作者:Ronald Grigg、Vladimir Savic
DOI:10.1016/0040-4039(96)01400-1
日期:1996.9
Pd(0) catalysed termolecular queuing processes involving oxidative addition to aryl or vinyl halides followed by cyclisation onto a proximate alkyne, allene (1atm) insertion, and capture of the resulting π-allylpalladium(II) species by secondary amines affords 5–8 membered benzoannelated heterocyclic dienes or electrocyclisation products respectively in good yield.
Palladium catalysed queuing processes. Part 4: Termolecular cyclisation–anion capture cascades employing allene as a relay switch and secondary amines as nucleophiles
Pd(0) catalysed termolecular queuing processes involving oxidative addition to aryl or vinyl halides followed by cyclisation onto a proximate alkyne or alkene, allene (1 atm) insertion and capture of the resulting π-allyl palladium(II) species by secondary amines affords benzo-fused 5–8-membered rings in good yield.