Cesium carbonate → 4-(4-Methanesulfonyl-phenoxy)-benzofuran-6-carboxylic acid ethyl ester

Reaction equation

[CH3:1][O:2][C:3]([C:5]1[CH:6]=[C:7]([O:15][C:16]2[CH:21]=[CH:20][C:19]([S:22]([CH3:25])(=[O:24])=[O:23])=[CH:18][CH:17]=2)[CH:8]=[C:9]2[O:13][CH:12](C)[CH2:11][C:10]=12)=[O:4].[CH3:26]S(C1C=CC(F)=CC=1)(=O)=O.C([O-])([O-])=O.[Cs+].[Cs+].C(OC(C1C=C(O)C2C=COC=2C=1)=O)C>>[CH2:1]([O:2][C:3]([C:5]1[CH:6]=[C:7]([O:15][C:16]2[CH:17]=[CH:18][C:19]([S:22]([CH3:25])(=[O:24])=[O:23])=[CH:20][CH:21]=2)[C:8]2[CH:11]=[CH:12][O:13][C:9]=2[CH:10]=1)=[O:4])[CH3:26]