反应详情

温度

120 °C

Into a Vial was added the 6-Chloro-pyridine-3-sulfonic thiazol-2-ylamide (82 mg, 0.00030 mol), 9,9-DIMETHYL-4,5-BIS(DIPHENYLPHOSPHINO)XANTHENE (21 mg, 0.000036 mol), Tris(dibenzylideneacetone)dipalladium(0) (11 mg, 0.000012 mol), [B] 1-(4-chlorobenzyl)-1H-pyrazol-4-amine dihydrochloride (1.0E2 mg, 0.00036 mol) and N,N-Dimethylacetamide (4.0 mL, 0.043 mol). The mixture was sparged with argon for ˜5 min. Sodium tert-butoxide (140 mg, 0.0015 mol) was added and the reaction mixture was heated at 120° C. for 30 min in microwave. The reaction mixture was filtered through celite. The filtrate was diluted with Ethyl acetate and washed with 0.1 N HCl solution. The aqueous phase was neutralized with 1.0 N NaOH solution, extracted with Ethyl acetate. The combined organic phase was washed with water (3×) and brine, dried over Na2SO4, filtered and was concentrated to give the crude product that was purified on Gilson (Prep LC, reverse phase, Phenomenex 250×30 mm, 15 micron C18 column, 40 mL/min. Gradient, 85% A to 100% B over 25 min. Solvent A: 7800 water/200 acetonitrile/8 TFA. Solvent B: 7200 acetonitrile/800 water/8). Fractions were checked by LC/MS and combined accordingly. LC/MS showed the product was only ˜90% pure. The combined product solution was concentrated to remove the acetonitrile, neutralized with 1.0 N NaOH solution and then extracted with Ethyl acetate (3×). The combined organic layers were dried over sodium sulfate, filtered and was concentrated to give the product as free base, which was purified again on ISCO (0% to 100% Ethyl acetate in DCM). 48 mg of the product was obtained as a pale yellow solid.

1. customThe mixture was sparged with argon for ˜5 min
2. filtrationThe reaction mixture was filtered through celite
3. additionThe filtrate was diluted with Ethyl acetate
4. washwashed with 0.1 N HCl solution
5. extractionextracted with Ethyl acetate
6. washThe combined organic phase was washed with water (3×) and brine
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationwas concentrated
10. customto give the crude product that
11. customwas purified on Gilson (Prep LC, reverse phase, Phenomenex 250×30 mm, 15 micron C18 column, 40 mL/min. Gradient, 85% A to 100% B over 25 min. Solvent A: 7800 water/200 acetonitrile/8 TFA. Solvent B: 7200 acetonitrile/800 water/8)
12. concentrationThe combined product solution was concentrated
13. customto remove the acetonitrile
14. extractionextracted with Ethyl acetate (3×)
15. dry with materialThe combined organic layers were dried over sodium sulfate
16. filtrationfiltered
17. concentrationwas concentrated
18. customto give the product as free base, which
19. customwas purified again on ISCO (0% to 100% Ethyl acetate in DCM)