C(=O)([O-])[O-].[K+].[K+].[CH3:7][O:8][C:9]([C:11]1[CH:15]=[CH:14][NH:13][CH:12]=1)=[O:10].Cl[C:17]1[C:26]2[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=2)[N:20]=[CH:19][CH:18]=1.O>CS(C)=O>[CH3:7][O:8][C:9]([C:11]1[CH:15]=[CH:14][N:13]([C:17]2[C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[N:20]=[CH:19][CH:18]=2)[CH:12]=1)=[O:10]1.73 g (12.5 mmol) of potassium carbonate are added at 20° C. under an argon atmosphere to 0.625 g (5 mmol) of 3-methoxycarbonyl-1H-pyrrole and 0.82 g (5 mmol) of 4-chloroquinoline dissolved in 10 mL of dimethyl sulphoxide. After stirring at 100° C. for 23 hours, the reaction mixture is poured into 30 mL of water and then allowed to crystallise at 20° C. for 1 hour. After filtering off and air-drying the solid residue, 0.75 g of 3-methoxycarbonyl-1-(quinol-4-yl)-1H-pyrrole is obtained in the form of a beige-coloured solid melting at 156° C.
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