Methanol → 9-Chloro-5,6-dihydrobenzo[f][1,2,4]triazolo[1,5-d][1,4]oxazepine-2-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Methyl-9-chloro-5,6-dihydrobenzo[f][1,2,4]triazolo[1,5-d][1,4]oxazepine-2-carboxylate (0.144 g, 0.515 mmol) was dissolved in 3:2:1 THF:MeOH:H2O (5.0 mL), and treated with 4 N aqueous LiOH (0.644 mL). The mixture was stirred for 30 min at 25° C. The reaction was quenched with 1 N aq. HCl (10 mL) and the solution was extracted with EtOAc (3×20 mL). The combined organic extracts were dried with Na2SO4 and concentrated in vacuo to give 9-Chloro-5,6-dihydrobenzo[f][1,2,4]triazolo[1,5-d][1,4]oxazepine-2-carboxylic acid (89% yield)

Provenance & Evidence