Dihydrobenzimidazole chemistry. Part V. The reaction of quaternised dihydrobenzimidazoles with nucleophiles
Abstract
2,3,3a,4-Tetrahydro-1H-pyrrolo[1,2-a]benzimidazoles (IV), unlike their hexahydropyrido- and othe homologues, give quaternary salts with benzyl chloride which react readily with nucleophiles (hydride, cyanide, and hydroxide ions) to give 1,6-benzodiazocine derivatives.