反应详情

A mixture of 1-{3-[4-(4-chlorobenzyl)-5-(4H-1,2,4-triazol-3-yl)-1,3-thiazol-2-yl]-2-methylpyrazolo[1,5-a]pyridin-5-yl}methanamine (0.0222 g, 0.0491), pyrazine-2-carboxylic acid chloride (8.0 mg, 0.056 mmol) and N,N-diisopropylethylamine (10 mg, 0.08 mmol) in dry Methylene chloride (5.0 mL) in dry N,N-dimethylformamide (1.0 mL) was sonicated for 2 min. The mixture was stirred at rt for 22 hours. N,N-diisopropylethylamine (13 mg, 0.10 mmol) and pyrazine-2-carboxylic acid chloride (9.11 mg, 0.0639 mmol) were added and the mixture was stirred at rt for 3 days. The mixture was quenched with water, then extracted with DCM (3×30 mL). The combined DCM solutions were washed with water, brine, dried over Na2SO4, filtered, and evaporated to give a crude product (80 mg). The crude product was purified by HPLC to give a solid product (0.0007 g, yield 3%). LCMS: (AA) ES+ 542, 544. 1H NMR (400 MHz, d6-DMSO) δ: 9.72-9.74 (d, J=6.53 Hz, 1H), 9.23 (s, 1H), 8.87 (s, 1H), 8.75 (s, 1H), 8.67-8.69 (d, J=6.53 Hz, 1H), 8.63 (s, 1H), 8.22 (s, 1H), 7.24-7.30 (m, 4H), 7.03-7.05 (d, J=7.28 Hz, 1H), 4.62-4.64 (d, J=6.78 Hz, 2H), 4.47 (s, 2H), 2.63 (s, 3H).

1. customwas sonicated for 2 min
2. stirringthe mixture was stirred at rt for 3 days
3. customThe mixture was quenched with water
4. extractionextracted with DCM (3×30 mL)
5. washThe combined DCM solutions were washed with water, brine
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. customevaporated
9. customto give a crude product (80 mg)
10. customThe crude product was purified by HPLC