反应详情

温度

0 °C

A solution of (1S,2R)-1-{[5-(2,4-dichlorophenyl)-3,6-diethylpyrazin-2-yl]amino}-2,3-dihydro-1H-inden-2-ol (321 mg, 0.75 mmol), 4-nitrobenzoic acid (552 mg, 3.3 mmol), and triphenylphosphine (964 mg, 3.7 mmol) in benzene (19 mL) was purged with nitrogen and cooled to 0° C. The resulting yellow suspension was treated with diethylazodicarboxylate (0.58 mL, 3.7 mmol) becoming lighter in color with gradual warming to RT. After 18 hours, the volatiles were removed under reduced pressure with the resulting crude residue being absorbed on 6 g silica gel and purified by Biotage MPLC (40 g column, 15% ethyl acetate/heptane) to afford the title compound as a light yellow solid. IR (diffuse reflectance) 1725, 1568, 1550, 1527, 1498, 1467, 1392, 1372, 1349, 1320, 1273, 1119, 1103, 836, 719 cm−1; OAMS supporting ions at: ESI+ 576.8; MS (CI) m/z 577 (MH+); HRMS (FAB) calcd for C30H26CL2N4O4 +H1 577.1409, found 577.1417.

1. temperaturewith gradual warming to RT
2. customthe volatiles were removed under reduced pressure with the resulting crude residue
3. custombeing absorbed on 6 g silica gel
4. custompurified by Biotage MPLC (40 g column, 15% ethyl acetate/heptane)