Hydrochloric Acid → benzyl 1H-pyrrolo[3,2-c]pyridine-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

40 ml of 1.7M tert-butyllithium in pentane are added, at −40° C. under nitrogen, to 5 g of 4-(N-Bocamino)-3-methylpyridine. After stirring for 1 hour at −40° C., the lithiated derivative thus formed is added to 12.9 g of benzyl oxalate in 100 ml of THF at −40° C. The mixture is allowed to return to 0° C., it is left stirring for 2 hours, 25 ml of 6N HCl are then added and this mixture is heated at 50° C. for one and a half hours. The pH is brought to 9 by addition of 1N NaOH, the mixture is then extracted with EtOAc and the extracts are dried and evaporated. The residue is chromatographed on silica, eluting with DCM/MeOR (100/3; v/v) to give 2.7 g of the expected compound.

Provenance & Evidence