反应详情

To a solution of 307 (1.4 g, 2.25 mmol) in DCM (30 ml) was added TEA (2 mL) and the reaction mixture was stirred for 1 h. More TFA (3 mL) was added and the reaction mixture was stirred for an additional 3 h then concentrated, diluted with water and 1M NaOH to pH 11. The solid was collected by filtration, rinsed with water and dried. The residue was purified by Biotage (SNAP 80 g cartridge; 2% of ammonium hydroxide in MeOH/DCM: 0/100 to 35/65 over 30 CV), to afford the title compound 308 (870 mg, 1.67 mmol, 74% yield) as a beige solid.

1. stirringthe reaction mixture was stirred for an additional 3 h
2. concentrationthen concentrated
3. additiondiluted with water and 1M NaOH to pH 11
4. filtrationThe solid was collected by filtration
5. washrinsed with water
6. customdried
7. customThe residue was purified by Biotage (SNAP 80 g cartridge; 2% of ammonium hydroxide in MeOH/DCM: 0/100 to 35/65 over 30 CV)