反应详情

温度

90 °C

A solution of 4-methoxy-3-methylbenzoic acid (10 mg, 59 HATU (23 mg, 1.1 eq), and Et3N (11 mg, 1.5 eq.) in DCM (1 mL) was stirred 20 min at 40° C. {2-[4-Amino-2-(4-chloro-2-methyl-2H-pyrazol-3-yl)-phenoxy]-ethyl}-carbamic acid tert-butyl ester (18 mg, 50 μmol) was added into the acid-HATU solution, and the reaction was stirred overnight at 40 C. The reaction was treated with TFA (˜0.2 mL) and heated to 90° C. for 1 h. The reaction was filtered through a strong cation exchage resin to remove impurity, TFA, and tetramethyl urea, and purified by prep-HPLC: Waters YMC ODS-A™ C18 column (5μ, 4.6×50 mm), 5% v/v CH3CN (containing 0.05% v/v TFA) in H2O (containing 0.05% v/v TFA) gradient to 60% v/v CH3CN in H2O, 20 mL/min. N-[4-(2-Amino-ethoxy)-3-(4-chloro-2-methyl-2H-pyrazol-3-yl)-phenyl]-4-methoxy-3-methyl-benzamide trifluoroacetate (14 mg, 69%) was obtained as a white powder. LCMS m/z (%)=415.3 (M+H 35Cl, 100), 417.3 (M+H 37Cl, 31). 1H NMR (400 MHz, DMSO-d6) δ: 10.1 (s, 1H), 7.93 (dd, J=2.5 and 8.8 Hz, 1H), 7.91-7.82 (m, 4H), 7.79 (bs, 1H), 7.70 (d, J=2.5 Hz, 1H), 7.65 (s, 1H), 7.27 (d, J=9.0 Hz, 1H), 7.06 (d, J=8.8 Hz, 1H), 4.19 (m, 2H), 3.86 (s, 3H), 3.67 (s, 3H), 3.16 (m, 2H), 2.21 (s, 3H).

1. filtrationThe reaction was filtered through a strong cation exchage resin
2. customto remove impurity, TFA, and tetramethyl urea
3. custompurified by prep-HPLC: Waters YMC ODS-A™ C18 column (5μ, 4.6×50 mm), 5% v/v CH3CN (
4. additioncontaining 0.05% v/v TFA) in H2O (
5. additioncontaining 0.05% v/v TFA) gradient to 60% v/v CH3CN in H2O, 20 mL/min