HCID 67087583, compound → HCID 50943871, compound

Participants

Reaction Steps

Butyl 2-(4-((1E,4E)-2-(tert-butoxycarbonylamino)-4-((3-(tert-butyldimethylsilyloxy)propyl)(propyl)carbamoyl)-3H-benzo[b]azepin-8-yl)phenyl)acetate was dissolved in 2 mls of dichloromethane and 0.5 ml of TFA. After about one hour, the mixture was concentrated under reduced pressure and the resulting residue was then re-dissolved in dichloromethane and 1 ml of concentrated ammonium hydroxide added and the mixture vigorously stirred for 15 minutes. This mixture was then diluted with water, extracted with dichloromethane (2×), extracts dried over sodium sulfate and concentrated under reduced pressure. Preparative thin layer chromatography (2×0.5 mm plates, 10% MeOH/DCM/0.5% NH4OH) afforded butyl 2-(4-((1E,4E)-2-amino-4-((3-hydroxypropyl)(propyl)carbamoyl)-3H-benzo[b]azepin-8-yl)phenyl)acetate. 1H NMR (400 MHz, CDCl3) δ 7.59-7.63 (m, 2H), 7.50-7.51 (m, 1H), 7.34-7.38 (m 2H), 7.32-7.34 (m, 2H), 6.88 (s, 2H), 4.09-4.14 (m, 2H), 3.58-3.68 (m, 6H), 3.45-3.51 (m, 2H), 2.87 (s, 2H), 1.79-1.88 (m, 2H), 1.57-1.76 (m, 4H), 1.30-1.42 (m, 2H), 0.89-0.96 (m, 6H); m/z (APCI-pos) M+1=492.2.

Provenance & Evidence