反应详情

A mixture of Intermediate 99d (108 mg, 0.27 mmol), (5-tert-butyl-2-p-tolyl-2H-pyrazol-3-yl)-carbamic acid 2,2,2-trichloro-ethyl ester (for reference procedure see Synthetic Communications, 2009, 39, 3999-4009, which is incorporated herein by reference in its entirety; 105 mg, 0.27 mmol) and DIPEA (93 μL, 0.54 mmol) in dioxane (3 mL) was stirred at 60° C. for 18 h and then at 80° C. for 4 h. The reaction mixture was diluted with EtOAc and then poured into water. The aqueous phase was extracted with EtOAc (×3) and the combined organic layers were washed with brine, dried (MgSO4) and concentrated in vacuo. The resultant residue was purified by MDAP (Method 7) to afford the title compound (23 mg, 13%). LCMS (Method 5): Rt 3.90 min, m/z 647 [MH+]. 1H NMR (400 MHz, CD3OD): 1.34 (9H, s), 1.59-1.85 (4H, m), 1.91-2.15 (3H, m), 2.18 (6H, s), 2.21-2.36 (5H, m), 2.42 (3H, s), 4.91-4.96 (1H, m), 5.34 (1H, t, J=4.1 Hz), 6.37 (1H, s), 7.22-7.40 (9H, m), 7.65 (1H, d, J=9.9 Hz), 8.46 (1H, d, J=2.2 Hz).

1. extractionThe aqueous phase was extracted with EtOAc (×3)
2. washthe combined organic layers were washed with brine
3. dry with materialdried (MgSO4)
4. concentrationconcentrated in vacuo
5. customThe resultant residue was purified by MDAP (Method 7)