Trimethyl orthoformate → HCID 70798266, compound

Participants

Reaction Steps

A catalytic amount of para-toluene sulfonic acid monohydrate was added to a solution of the above amine intermediate and trimethyl orthoformate (3 mL) in MeOH (10 mL). After 1 hr the crude material was adsorbed onto silica gel and purified by column chromatography (eluted with 1 and 2% MeOH/DCM) to yield tert-Butyl 9-(2,6-difluorobenzyl)-2-(6-cyano-1H-benzo[d]imidazol-1-yl)-8-oxo-8,9-dihydropurine-7-carboxylate (60) (164 mg), MH+=504 and MH+-BOC=404.

Provenance & Evidence