反应详情

To a stirred solution of 4-bromo-5,6,7,8-tetrahydroisoquinolin-8-amine (intermediate B-12 [A], 318 mg, 1.4 mmol) and Et3N (3.0 mL) in DCM (10 mL) was added acetyl chloride (0.106 mL, 1.4 mmol) at 0° C. and stirring was continued at 0° C. for 1 hour. The resulting mixture was extracted with EtOAc (2×100 mL). The combined organics were washed with brine, dried over anhy. Na2SO4, filtered and concentrated in vacuo to afford a crude product which was purified by silica gel flash chromatography eluting with a 0 to 50% EtOAc-heptane gradient to give the title compound (346 mg, 92%) as light yellow solid. MS: 269.1 & 271.1 (M+H+).

1. extractionThe resulting mixture was extracted with EtOAc (2×100 mL)
2. washThe combined organics were washed with brine
3. customdried over anhy
4. filtrationNa2SO4, filtered
5. concentrationconcentrated in vacuo
6. customto afford a crude product which
7. customwas purified by silica gel flash chromatography
8. washeluting with a 0 to 50% EtOAc-heptane gradient