Reaction #2460301

Reaction equation

2,4′-thiobis(benzoic acid)

→

thioxanthen-9-one-2-carboxylic acid

Solvents

methansulfonic acid

Conditions

Workup

1. 1
   Temperaturecooled
2. 2
   workup.ADDITIONThe reaction mixture was poured onto ice
3. 3
   Otherthe resulting precipitate was collected
4. 4
   Washwashed with water
5. 5
   Otherdried

Procedure

Next, thioxanthen-9-one-2-carboxylic acid was prepared. A mixture of 2,4′-thiobis(benzoic acid) (50 g, 182 mmol) and methansulfonic acid (600 mL) was heated at 85° C. for 5 h and then cooled to ambient. The reaction mixture was poured onto ice, and the resulting precipitate was collected, washed with water, and dried.

Source