反应详情

A solution of 6-Benzylamino-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester (320 mg, 0.95 mmol), methyl-1-H-pyrazole-3-sulfonyl chloride (303 mg, 1.68 mmol) and pyridine (229 μl, 2.84 mmol) in dry dichloromethane (10 ml) were heated to reflux for 15 hrs. The reaction mixture was cooled to room temperature and concentrated in vacuo. The crude residue was purified by column chromatography (1% methanol in dichloromethane) to afford the title compound as an off yellow solid (393 mg, 86% yield). HPLC retention time 4.72 min. Mass spectrum (ES+) m/z 505 (M+23, sodium salt).

1. temperatureto reflux for 15 hrs
2. concentrationconcentrated in vacuo
3. customThe crude residue was purified by column chromatography (1% methanol in dichloromethane)