[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([N+:12]([O-:14])=[O:13])=[C:6]([S:8](O)(=[O:10])=[O:9])[CH:7]=1.O=S(Cl)[Cl:17]>CN(C=O)C>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([N+:12]([O-:14])=[O:13])=[C:6]([S:8]([Cl:17])(=[O:10])=[O:9])[CH:7]=1In a similar fashion using route 39 general procedure 96, 5-methyl-2-nitro-benzenesulfonic acid 449 (1.8 g, 8.2 mmol), SOCl2 (10 ml) and DMF (0.18 ml) at 90° C. for 3 h gave the title compound (1.2 g) which was used in the next step without further purification. The structure was confirmed by 1H NMR.
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