[I:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][CH2:8][C:7](=O)[C:6]=2[CH:11]=1.Cl.[NH:13]([C:15]1[CH:23]=[CH:22][CH:21]=[CH:20][C:16]=1[C:17]([OH:19])=[O:18])N>C(O)C.O>[I:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]3[C:23]4[C:15](=[C:16]([C:17]([OH:19])=[O:18])[CH:20]=[CH:21][CH:22]=4)[NH:13][C:7]=3[C:6]=2[CH:11]=1To a solution of 5-iodo-3(2H)-benzofuranone (0.551 g, 2.12 mmol) [Cagniant, P. et al. Hebd. Seances Acad. Sci., Ser. C, 1976, 282 (21), 993-6] in ethanol (100 mL) was added a solution of 2-hydrazinobenzoic acid hydrochloride (0.800 g, 4.24 mmol) in deionized water (50 mL). The mixture was stirred for one hour at room temperature and then allowed to sit while cooled (0° C.). Vacuum filtration and drying in vacuo afforded 0.480 g (58%) of the title compound as a tan solid: mp 169° C. (dec) which was used without further purification.
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