反应详情

A mixture of N-(4-(bromomethyl)phenyl)-3-methyl-3-(2,4,5-trimethyl-3,6-dioxocyclohexa-1,4-dien-1-yl)butanamide (0.23 g, 0.57 mmol), 6-hydroxy-2-cyanobenzothiazole (0.15 g, 0.86 mmol), 2,4,6-collidine (0.125 ml) and Ag2CO3 (0.24 g, 0.86 mmol) in 15 ml of dry THF was stirred at room temperature over night. After removal of solid by filtration, the compound was purified by silica chromatography using heptane and ethyl acetate as eluent to give a yield of 40%. The product was further purified by HPLC to remove small contamination of 2-cyano-6-hydroxybenzothiazole. 1H NMR (300 MHz, CD2Cl2) δ 7.4-7.5 (m, 3H), 7.35-7.42 (m, 2H), 7.32 (dd, 1H), 7.25 (s, br, 1H, NH), 7.18 (dd, 1H), 5.15 (s, 2H, CH2O), 2.99 (s, 2H, CH2), 2.14 (s, 3H, CH3), 1.92 (s, 6H, CH3), 1.47 (s, 6H, CH3). MS (m/e): 514.2 (M+).

1. customAfter removal of solid
2. filtrationby filtration
3. customthe compound was purified by silica chromatography
4. customto give a yield of 40%
5. customThe product was further purified by HPLC
6. customto remove small contamination of 2-cyano-6-hydroxybenzothiazole