反应详情

To aniline (0.063 g, 0.677 mmol) and DMAP (0.033 g, 0.271 mmol) in 1,4-dioxane (1 mL) at about 40° C. was added a solution of (1S,3R,4S)-3-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentyl 4-nitrophenyl carbonate (0.080 g, 0.135 mmol, prepared from Example #42 Step N) in 1,4-dioxane (1 mL). After about 2 h, the solvent was removed and the residue was purified by silica gel chromatography (12 g) eluting with 0-40% EtOAc in DCM to give (1S,3R,4S)-3-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentyl phenylcarbamate (0.0468 g, 63%): LC/MS (Table 1, Method b) Rt=2.58 min; MS m/z: 545 (M+H)+.

1. customthe solvent was removed
2. customthe residue was purified by silica gel chromatography (12 g)
3. washeluting with 0-40% EtOAc in DCM