1,1-dimethylethyl 5-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-3,4-dihydro-2(1H)-isoquinolinecarboxylate → 5-(5-{3-Chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1,2,3,4-tetrahydroisoquinoline hydrochloride

Participants

Reaction Steps

1,1-dimethylethyl 5-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-3,4-dihydro-2(1H)-isoquinolinecarboxylate (Preparation 3) (2.57 g, 5.47 mmol) was stirred in 4M HCl in 1,4-Dioxane (100 mL). After 1 hour reaction became cloudy and stirring continued for a further 16 hours. Evaporation yielded 5-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1,2,3,4-tetrahydroisoquinoline hydrochloride (2.23 g). 1H NMR (400 MHz, d6-DMSO) δ 9.43 (2H, s), 8.19 (1H, s), 8.11 (1H dd), 8.03-8.00 (1H, m), 7.51-7.45 (3H, m), 4.89 (1H, sept.), 4.38 (2H, s), 3.43 (2H, t), 3.35-3.32 (2H, m), 1.37 (6H, d); m/z (API-ES) 370, 372 [M+H]+.

Provenance & Evidence