Water → HCID 69461264, compound

Participants

Reaction Steps

To a solution of 920 μl (1.84 mmol) of 2M LDA/THF in 5 ml of anhydrous THF, add dropwise at −78° C. under an inert atmosphere a solution of 300 mg (0.92 mmol) of 1-ethyl-7,8-dimethoxy-5-phenyl-1,3-dihydro-2H-1,4-benzodiazepin-2-one (IIbd) in 2 ml of THF. Allow to equilibrate to room temperature for 30 minutes. Add dropwise at −30° C. a solution of 220 mg (1.01 mmol) of 2-nitrobenzyl bromide in 2 ml of THF. Stir at room temperature for 12 hours. Add 1 ml of H2O. Evaporate the THF. Purify by silica chromatography (AcOEt 1/hexane 4, 1/1, then AcOEt). Recrystallize in EtOH/cHexane. Yield: 35%. M: 158–160° C. 1H-NMR (DMSO, 300 MHz): d 0.87–0.91 (m, 3H, CH3), 3.61–3.99 (m, 10H, NCH+CHCH2+2OCH3), 4.35–4.40 (m, 1H, NCH), 6.60 (s, 1H Ar), 6.82 (s, 1 H Ar), 7.37–7.90 (m, 9H Ar). Mass: (M+H)+=460.88.

Provenance & Evidence