Methanol → Methyl 3-(chlorosulfonyl)-1-benzothiophene-2-carboxylate
Reaktionsgleichung
Cl[C:2]([C:4]1[S:8][C:7]2[CH:9]=[CH:10][CH:11]=[CH:12][C:6]=2[C:5]=1[S:13]([Cl:16])(=[O:15])=[O:14])=[O:3].[CH3:17][OH:18]>C(Cl)(Cl)Cl>[CH3:17][O:18][C:2]([C:4]1[S:8][C:7]2[CH:9]=[CH:10][CH:11]=[CH:12][C:6]=2[C:5]=1[S:13]([Cl:16])(=[O:14])=[O:15])=[O:3]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
168.0 gm (0.569 mol) of 2-chlorocarbonyl-benzo[b]thiophene-3-sulfonic acid chloride were dissolved in 1 liter of anhydrous chloroform, and the solution was admixed with 27.5 gm (0.858 mol) of dry methanol and refluxed for 3 hours. The reaction mixture was evaporated in vacuo, and the residue was recrystallized twice from a little methanol, yielding 88.5 gm (53.5% of theory) of colorless 2-methoxycarbonyl-benzo[b]-thiophene-3-sulfonic acid chloride. M.p.: 100°-101° C.