反应详情

1-Benzo[1,3]dioxol-5-yl-cyclopropanecarboxylic acid (1.29 g, 6.28 mmol) was placed in an oven-dried flask under nitrogen. Thionyl chloride (3 mL) and N,N-dimethylformamide (0.3 mL) were added and the solution was allowed to stir for 2 hours. The excess thionyl chloride was removed under vacuum and the resulting solid was suspended in 30 mL of anhydrous 1,4-dioxane containing triethylamine (1.77 mL, 12.6 mmol). (2-Amino-thiazol-5-yl)-(2-chloro-phenyl)-methanone (1.50 g, 6.28 mmol) suspended in 10 mL of anhydrous 1,4-dioxane was slowly added to this suspension. The resulting suspension was allowed to stir for 20 minutes. The mixture was filtered and then the filtrate was evaporated to dryness. The crude product was dissolved in 50 mL of dichloromethane and washed three times with 50 mL of 1N HCl, saturated aqueous sodium bicarbonate, and saturated aqueous sodium chloride. The organic layer was then dried over sodium sulfate and evaporated to dryness to yield the product as a beige solid (1.51 g, 3.54 mmol, 56.4%). 1H NMR (400 MHz, DMSO-d6) δ 1.20-1.24 (m, 2H), 1.54-1.57 (m, 2H), 6.01 (s, 2H), 6.88 (d, J=1.3 Hz, 2H), 6.98 (s, 1H), 7.48-7.52 (m, 1H), 7.56-7.60 (m, 3H), 7.77 (s, 1H), 11.98 (s, 1H). ESI-MS m/z calc. 426.0. found; 427.3 (M+1)+; Retention time 3.46 minutes.

1. customThe excess thionyl chloride was removed under vacuum
2. additionwas slowly added to this suspension
3. stirringto stir for 20 minutes
4. filtrationThe mixture was filtered
5. customthe filtrate was evaporated to dryness
6. dissolutionThe crude product was dissolved in 50 mL of dichloromethane
7. washwashed three times with 50 mL of 1N HCl, saturated aqueous sodium bicarbonate, and saturated aqueous sodium chloride
8. dry with materialThe organic layer was then dried over sodium sulfate
9. customevaporated to dryness