反应详情

温度

120 °C

A slurry of 3-amino-6-(1-phenylcyclopropyl)pyridine-2(1H)-thione (1.00 g, 4.13 mmol) and methyl 4-(chlorocarbonyl)-3-nitrobenzoate (1.11 g, 4.54 mmol) in 10 mL toluene was heated under nitrogen with a water cooled reflux condenser was heated in a 120° C. oil bath. After bubbling had subsided, ((1S,4R)-7,7-dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonic acid (0.479 g, 2.06 mmol) was added through the condenser and heating continued for 30 min. The slurry was treated with 5 mL toluene to and heating continued overnight to give a dark brown solution. The reaction mixture was cooled to ambient temperature, then diluted with EtOAc, washed with water, sat'd aq. Bicarbonate, and brine. The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo to give a brown oil. Purification by silica gel chromatography, 40 g, 0-30% EA/hexanes gave methyl 3-nitro-4-(5-(1-phenylcyclopropyl)thiazolo[5,4-b]pyridine-2-yl)benzoate as a light brown solid. MS (ESI) m/z: Calculated: 431.1; Observed: 432.0 (M++1).

1. temperaturecooled
2. temperaturereflux condenser
3. customAfter bubbling
4. temperatureheating
5. temperatureheating
6. waitcontinued overnight
7. customto give a dark brown solution
8. temperatureThe reaction mixture was cooled to ambient temperature
9. washwashed with water
10. dry with materialThe organic layer was dried over sodium sulfate
11. filtrationfiltered
12. concentrationconcentrated in vacuo
13. customto give a brown oil
14. customPurification by silica gel chromatography, 40 g, 0-30% EA/hexanes