反应详情

In particular, commercially available ethyl benzothiazole-2-carboxylate 6 (24.1 mmol, 5.0 g) was suspended in 22 ml conc. H2SO4 at 0° C. At 10° C. KNO3 (26.4 mmol, 2.6 g) was added portionwise over 30 min to the stifling solution, not to exceed 15° C. Color of reaction changed from bright green/yellow to yellow over time. The reaction warmed from 25° C. to 40° C. for an additional 30 min. When the temperature of the reaction was decreased, the solution was poured over ice/water). The precipitate forming in solution was collected via glass frit vacuum filtration to yield a light yellow solid 7.

1. customAt 10° C
2. customto exceed 15° C
3. customColor of reaction
4. temperatureThe reaction warmed from 25° C. to 40° C. for an additional 30 min
5. customThe precipitate forming in solution
6. filtrationwas collected via glass frit vacuum filtration