反应详情

In a 2-liter flask, 75.6 g (0.5 mol) of benzothiazolinone are dissolved in a solution containing 20 g of sodium hydroxide (0.5 mol) in approximately 800 cm3 of water. The solution is filtered. With magnetic stirring, 47.5 cm3 of methylsulfate (0.5 mol) are introduced dropwise with a dropping funnel. After the addition, the mixture is left stirring for 20 hours at room temperature. The medium is alkalinized with a slight excess of sodium hydroxide and left stirring for one hour. The precipitate obtained is drained and washed with water until the filtrate is neutral. The product is dried. It is recrystallized in propanol.

1. filtrationThe solution is filtered
2. additionAfter the addition
3. waitthe mixture is left
4. waitleft
5. stirringstirring for one hour
6. customThe precipitate obtained
7. washwashed with water until the filtrate
8. customThe product is dried
9. customIt is recrystallized in propanol