反应详情

A 1.0 M solution of tBuOK in THF (0.3 mL) is added to a mixture of 2-hydroxymethyl-pyrazolo[1,5-a]pyridine-4-carboxylic acid (adamantan-1-ylmethyl)amide (73 mg, 210 μmol) and DMF (1 mL) at 0° C. under N2. After 5 min, ethyl bromoacetate (30 μL, 280 μmol) is added. The cold bath is removed and the mixture is left to stir for 23 h. 50% Sat. aq. NaHCO3 is added and the solution is extracted with EtOAc (20 mL). The organics are dried over Na2SO4, filtered and concentrated. Purification by PTLC (2:1 EtOAc:hexanes) affords the title compound as a pale yellow film. 1H NMR (400 MHz, CDCl3) δ: 8.50 (dd, 1H), 7.57 (d, 1H), 6.88 (s, 1H), 6.81 (dt, 1H), 6.27 (bs, 1H), 4.88 (s, 2H), 4.22 (q, 2H), 4.19 (s, 2H), 3.21 (d, 2H), 1.94-2.04 (m, 3H), 1.56-1.78 (m, 12H), 1.28 (t, 3H). LC-MS m/z (M+H+): 426.3; RT=1.31.

1. customThe cold bath is removed
2. waitthe mixture is left
3. addition50% Sat. aq. NaHCO3 is added
4. extractionthe solution is extracted with EtOAc (20 mL)
5. dry with materialThe organics are dried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification by PTLC (2:1 EtOAc:hexanes)