反应详情

A solution of ethyl 1-(4-chlorophenyl)-2-oxo-4-thioxo-1,2,4,5-tetrahydrospiro[benzo[b][1,4]diazepine-3,1′-cyclopropane]-2′-carboxylate (70 mg, 0.17 mmol) and acetohydrazide (60 mg, 0.78 mmol) in n-BuOH (20 mL) was heated at 130° C. overnight. The solution was evaporated and purified by CombiFlash (DCM:MeOH=10:1) to afford ethyl 6-(4-chlorophenyl)-1-methyl-5-oxo-5,6-dihydrospiro[benzo[b][1,2,4]triazolo[4,3-d][1,4]diazepine-4,1′-cyclopropane]-2′-carboxylate (30 mg, 41%). LRMS (M+H)+: 422 m/z. 1H NMR (300 MHz, CD3OD): δ 1.04-1.08 (t, J=7.2 Hz, 3H), 1.92-1.97 (m, 1H), 2.10-2.18 (m, 2H), 2.74 (s, 3H), 3.87-4.03 (m, 2H), 6.96-6.99 (m, 1H), 7.23-7.27 (m, 2H), 7.41-7.54 (m, 4H), 7.69-7.72 (m, 1H).

1. customThe solution was evaporated
2. custompurified by CombiFlash (DCM:MeOH=10:1)