反应详情

To a stirred mixture of concentrated sulphuric acid (300 ml) and toluene (46 ml), o-mercaptobenzoic acid (30 g) was added slowly. The mixture was stirred for 8 hrs. and allowed to stand for a further 10 hrs. After 1 hr. heating on the steam bath the dark red solution was cooled and poured on to ice. The gummy yellow precipitate was filtered off and triturated with 2N aqueous sodium hydroxide. The solid isomer-mixture was filtered off, washed with water, and dried at room temperature in vacuo, m.p. 107°-132° C.

1. additionwas added slowly
2. waitto stand for a further 10 hrs
3. waitAfter 1 hr
4. temperatureheating on the steam bath the dark red solution
5. temperaturewas cooled
6. additionpoured on to ice
7. filtrationThe gummy yellow precipitate was filtered off
8. customtriturated with 2N aqueous sodium hydroxide
9. filtrationThe solid isomer-mixture was filtered off
10. washwashed with water
11. customdried at room temperature in vacuo, m.p. 107°-132° C.