[F:1][C:2]1[C:7]([F:8])=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:9][S:10][C:11]1[N:16]=[C:15]([NH2:17])[C:14]([N:18]=O)=[C:13]([NH2:20])[N:12]=1.[O-]S(S([O-])=O)=O.[Na+].[Na+].S(=O)(=O)(O)O>O>[F:1][C:2]1[C:7]([F:8])=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:9][S:10][C:11]1[N:12]=[C:13]([NH2:20])[C:14]([NH2:18])=[C:15]([NH2:17])[N:16]=1To a suspension of the product of step (b) (2 g) in boiling water (40 ml) was added Na2S2O4 (5.4 g) portion-wise. The suspension was allowed to cool and then 50% sulphuric acid was added slowly and then the mixture was cooled to 0° C. The solid was isolated by filtration and washed with cold water, then dried over P2O5 at 50° C. to give the sub-titled product as a yellow solid.
Wird geladen…