反应详情

1-Methylethyl [(2S,4R)-1-acetyl-6-bromo-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl]carbamate (for preparation see Intermediate 1) (185 mg), 1-[2-(methyloxy)ethyl]-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (for a preparation see Journal of Heterocyclic Chemistry, 41(6), 931-939; 2004) (151 mg), potassium carbonate (90 mg) and tetrakis(triphenylphosphine)palladium(0) (28.9 mg) were combined in ethanol and toluene under nitrogen and heated to 80° C. for 18 h. The reaction was concentrated, the residue partioned between ethyl acetate (10 ml) and water (10 ml) and the aqueous layer was extracted with ethyl acetate (10 ml). The combined organics were washed with brine (25 ml), dried with sodium sulphate, filtered and concentrated. The residue was purified by MDAP (formate ×2) and the collected product dissolved in 1,4-dioxane (0.5 ml) and cooled in a CO2 bath then left on a freeze dryer overnight. The resulting white solid was dried at 40° C. under vacuum overnight to give 1-methylethyl ((2S,4R)-1-acetyl-2-methyl-6-{1-[2-(methyloxy)ethyl]-1H-pyrazol-4-yl}-1,2,3,4-tetrahydro-4-quinolinyl)carbamate (84.7 mg). LCMS (formate), Rt 0.84 min, MH+ 415

1. concentrationThe reaction was concentrated
2. extractionthe residue partioned between ethyl acetate (10 ml) and water (10 ml) and the aqueous layer was extracted with ethyl acetate (10 ml)
3. washThe combined organics were washed with brine (25 ml)
4. dry with materialdried with sodium sulphate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by MDAP (formate ×2)
8. dissolutionthe collected product dissolved in 1,4-dioxane (0.5 ml)
9. temperaturecooled in a CO2 bath
10. customThe resulting white solid was dried at 40° C. under vacuum overnight