[H-].[Na+].[N+:3]([C:6]1[CH:11]=[CH:10][C:9]([C:12]2[N:13]=[C:14]([NH:17][CH2:18][C:19]3[CH:28]=[CH:27][C:22]([C:23]([O:25][CH3:26])=[O:24])=[CH:21][CH:20]=3)[S:15][CH:16]=2)=[CH:8][CH:7]=1)([O-:5])=[O:4].CI.[CH:31](OC(C)C)(C)C>CN(C)C=O.O>[CH3:31][N:17]([CH2:18][C:19]1[CH:20]=[CH:21][C:22]([C:23]([O:25][CH3:26])=[O:24])=[CH:27][CH:28]=1)[C:14]1[S:15][CH:16]=[C:12]([C:9]2[CH:8]=[CH:7][C:6]([N+:3]([O-:5])=[O:4])=[CH:11][CH:10]=2)[N:13]=1
Under an argon atmosphere, to a suspension of sodium hydride (content 60%, 26.4 g, 0.661 mol) in N,N-dimethylformamide (530 ml, 2.5 v/w) were successively added dropwise a solution of methyl 4-((4-(4-nitrophenyl)-2-thiazolyl)aminomethyl)benzoate (212.4 g, 0.575 mol) obtained in Example 1(2) in N,N-dimethylformamide (743 ml, 3.5 v/w) and methyl iodide (41.2 ml, 0.661 mol) at 10° C. or below, and the mixture was stirred at room temperature for 2 hr. Sodium hydride (content 60%, 2.3 g, 0.057 mol) was added and the mixture was stirred at room temperature for 1 hr. The reaction mixture was added dropwise to water (2120 ml, 10.0 v/w) at 10° C. or below, and, after stirring at room temperature for 30 min., diisopropyl ether (848 ml, 4.0 v/w) was added and the mixture was stirred for 2 hr. The precipitated crystals were collected by filtration, washed successively with diisopropyl ether (424 ml) and water (424 ml) and dried in vacuo to give the title compound (201.9 g, yield 91.4%) as a yellow solid.
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