反应详情

A solution of methyl 4-(5-carboxy-1-methylindol-3-ylmethyl)-3-methoxybenzoate (2.0 g), 4-dimethylaminopyridine (0.71 g), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.3 g), triethylamine (1.0 mL) and 4,4,4-trifluoro-2-methylbutylamine hydrochloride (1.2 g) in methylene chloride (28 mL) was stirred under a nitrogen atmosphere for 18 hours. The mixture was diluted with methylene chloride, washed (10% (w/v) hydrochloric acid, water and brine), dried (MgSO4), and evaporated. The resulting ivory foam was purified by flash chromatography, eluting with 1:1 ethyl acetate:hexane to afford methyl 3-methoxy-4-[1-methyl-5-(2-methyl-4,4,4-trifluorobutylcarbamoyl)indol-3-ylmethyl]benzoate as a white powder (2.2 g, 82%); mp 168°-170° C.; partial NMR (300 MHz, CDCl3): 1.12 (d, 3H, CHCH3), 2.00 (m, 1H), 2.22 (m, 2H), 3.34-3.52 (m, 2H, NCH2), 3.75 (s, 3H, NCH3), 3.90 (s, 3H, CO2CH3), 3.93 (s, 3H, OCH3), 4.13 (s, 2H, CH2), 6.21 (t, 1H, NH), 6.82 (s, 1H, indole-H(2)), 8.02 (s, 1H, indole-H(4)).

1. washwashed (10% (w/v) hydrochloric acid, water and brine)
2. dry with materialdried (MgSO4)
3. customevaporated
4. customThe resulting ivory foam was purified by flash chromatography
5. washeluting with 1:1 ethyl acetate