Dihydroimidazoles in synthesis: C-alkylation of 1-benzyl-2-(α-lithioalkyl)-4,5-dihydroimidazoles and a synthesis of alkanoic acids
Abstract
1-Benzyl-2-alkyl-4,5-dihydroimidazoles have been (laterally) metallated and C-alkylated by reaction with alkyl halides and an epoxide; intramolecular C-alkylation has led to a tetrahydro-5H-pyrrolo-[1,2-a]imidazole. Hydrolysis of the 4,5-dihydroimidazoles to produce alkanoic acids completes a homologation sequence.