Thioglycolic Acid → (4,5-Dihydroxy-10-oxo-9,10-dihydro-anthracen-9-ylsulfanyl)-acetic acid
Reaction equation
Br[CH:2]1[C:15]2[C:10](=[C:11]([OH:16])[CH:12]=[CH:13][CH:14]=2)[C:9](=[O:17])[C:8]2[C:7]([OH:18])=[CH:6][CH:5]=[CH:4][C:3]1=2.[SH:19][CH2:20][C:21]([OH:23])=[O:22]>ClCCl>[C:21]([CH2:20][S:19][CH:2]1[C:15]2[C:10](=[C:11]([OH:16])[CH:12]=[CH:13][CH:14]=2)[C:9](=[O:17])[C:8]2[C:7]([OH:18])=[CH:6][CH:5]=[CH:4][C:3]1=2)([OH:23])=[O:22]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
10-Bromo-1,8-dihydroxy-9-anthrone (305 mg) was dissolved in dichloromethane (10 ml) and mercaptoacetic acid (0.07 ml) was added. The solution was stirred at room temperature for 3 days, during which time a yellow precipitate was formed, which was filtered off and recrystallised from absolute ethanol to give 10-(carboxymethylthio)-1,8-dihydroxy-9-anthrone (237 mg, 75%) as yellow needles, melting point 151°-152° C.