反应详情

Prepared using General Procedure 6: To a stirred solution of 2-methoxy-4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)benzoic acid INT-23 (404 mg, 1.05 mmol), tert-butyl 2-((4-hydroxybenzyl)amino)acetate INT-22 (250 mg, 1.05 mmol) and TEA (367 μL, 2.63 mmol) in DMF (5 mL) was added HATU (421 mg, 1.11 mmol). After 2 h the reaction mixture was diluted with EA (100 mL) and washed with brine (2×150 mL). The organics were pre-absorbed onto silica gel and then purified by chromatography (EA/isohexanes) to afford 633 mg (99%) of tert-butyl 2-(N-(4-hydroxybenzyl)-2-methoxy-4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)benzamido)acetate INT-24 as a waxy solid. LCMS-ESI (m/z) calculated for C31H33F3N2O7: 602 found 601 [M−H]−, tR=2.29 min (Method 10). 1H NMR (400 MHz, DMSO 100° C.) δ 10.25 (s, 1H), 9.28 (s, 1H), 7.52-7.41 (m, 2H), 7.27-7.04 (m, 5H), 6.95 (d, J=8.0 Hz, 1H), 6.72 (dd, J=20.5, 7.9 Hz, 2H), 4.52 (br s, 1H), 4.22 (s, 1H), 3.81 (m, 9H), 3.62 (s, 1H), 1.40 (d, J=2.1 Hz, 4.5H), 1.30 (d, J=2.1 Hz, 4.5H).

1. customPrepared
2. washwashed with brine (2×150 mL)
3. customThe organics were pre-absorbed onto silica gel
4. custompurified by chromatography (EA/isohexanes)