Diisopropylethylamine → 2-(4-{[(3,4-Dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}piperidin-1-yl)-4-{[(tetrahydrofuran-3-ylcarbonyl)amino]methyl}-1,3-thiazole-5-carboxylic acid

Participants

Reaction Steps

Ethyl 4-(aminomethyl)-2-(4-{[(3,4-dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}piperidin-1-yl)-1,3-thiazole-5-carboxylate (Example 246; 200 mg; 0.434 mmol) was dissolved in anhydrous DMF (2 ml). HATU 165 mg; 0.434 mmol) was added followed by diisopropylethylamine (149 μl, 0.868 mmol). The reaction mixture was stirred for 10 minutes and tetrahydrofuran-3-carboxylic acid (50 mg; 0.434 mmol) and reaction was stirred at room temperature for 2.5 h. The mixture was diluted with EtOAc, washed well with water, dried over Na2SO4 and concentrated in vacuo to give the title compound as an off-white solid (220 mg)-(LCMS (ES) MH+: 558, 561). The ethyl ester product was hydrolysed with lithium hydroxide/THF in a manner analogous to Example 31 to give the title compound (25 mg).

Provenance & Evidence