反应详情

温度

60 °C

To a stirred solution of methyl 1-isopropyl-3-methyl-6-(1H-tetrazol-5-yl)-1H-indole-4-carboxylate (0.27 g, 0.902 mmol) in MeOH (15 mL) and tetrahydrofuran (5 mL) was added 1N NaOH (5 mL, 5.00 mmol). The reaction was heated to 60° C. and stirred for 48 hr. LCMS showed that the reaction was complete. The reaction was concentrated to near dryness under vacuum, acidified with 1N HCl (5 mL), triturated, filtered and washed with a small volume of water, and dried under vacuum to give the product 1-isopropyl-3-methyl-6-(1H-tetrazol-5-yl)-1H-indole-4-carboxylic acid (0.26 g, 0.911 mmol, 101% yield) as a light yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 13.04 (br. s., 1H), 8.36 (d, J=1.5 Hz, 1H), 8.13 (d, J=1.3 Hz, 1H), 7.65 (s, 1H), 4.85 (quin, J=6.6 Hz, 1H), 2.36 (s, 3H), 1.50 (d, J=6.6 Hz, 6H). MS(ES)+ m/e 286.1 [M+H]+.

1. concentrationThe reaction was concentrated
2. customtriturated
3. filtrationfiltered
4. washwashed with a small volume of water
5. customdried under vacuum