Sulfuric Acid → HCID 57923805, compound

Participants

Reaction Steps

4,4′-(5,5-Dioxidodibenzo[b,d]thiene-3,7-diyl)dibenzenesulfonic acid (II) was prepared by sulfonation of 1,1′:4′,1″:4″,1′″-quaterphenyl. 1,1′:4′,1″:4″,1′″-Quaterphenyl (10 g) was charged into 20% oleum (100 ml). Reaction mass was agitated for 5 hours at ambient conditions. After that the reaction mixture was diluted with water (170 ml). The final sulfuric acid concentration was around 55%. The precipitate was filtered and rinsed with glacial acetic acid (˜200 ml). Filter cake was dried in oven at ˜110° C. The process yielded 8 g of 4,4′-(5,5-Dioxidodibenzo[b,d]thiene-3,7-diyl)dibenzenesulfonic acid.

Provenance & Evidence