反应详情

(S)-(9H-fluoren-9-yl)methyl1-(8-chloro-2-(4-methoxybenzyl)-1-oxo-1,2-dihydroisoquinolin-3-yl)ethylcarbamate (344) (80 g, 142 mmol, 1.0 eq) was dissolved in 2,2,2-trifluoroacetic acid (300 mL) and the resulting mixture was stirred at reflux for 2 h. The mixture was allowed to cool to RT and then concentrated in vacuo. The residue was poured into water and then neutralized with NH3.H2O to adjust the pH value to 6-7 under 0° C. The resulting mixture was stirred at RT for 30 min. The solid was collected by filtration, rinsed with water (2×50 mL) and dried in vacuo to afford (S)-(9H-fluoren-9-yl)methyl 1-(8-chloro-1-oxo-1,2-dihydroisoquinolin-3-yl)ethylcarbamate (345).

1. temperatureat reflux for 2 h
2. concentrationconcentrated in vacuo
3. additionThe residue was poured into water
4. customunder 0° C
5. stirringThe resulting mixture was stirred at RT for 30 min
6. filtrationThe solid was collected by filtration
7. washrinsed with water (2×50 mL)
8. customdried in vacuo