Methyl 4-(ethylamino)-3-nitrobenzoate → 3-[3-Benzyl-5-(3-methyl-3H-benzothiazol-2-ylidene)-4-oxothiazolidin-2-ylideneamino]-4-ethylaminobenzoic Acid Methyl Ester

Participants

Reaction Steps

In a manner similar to Example 30, intermediate 4-ethylamino-3-nitrobenzoic acid methyl ester was hydrogenated and then condensed with 3-benzyl-5-(3-methyl-3H-benzothiazol-2-ylidene)-2-methylthio-4-oxo-2-thiazolium p-toluenesulfonate to afford the title compound. 1H-NMR (CDCl3): δ 7.73 (1H, dd), 7.65 (1H, d), 7.52 (1H, dd), 7.45–7.49 (2H, m), 7.27–7.38 (4H, m), 7.18 (1H, m), 7.06 (1H, d), 6.52 (1H, d), 5.19 (2H, s), 4.14 (1H, br t), 3.85 (3H, s), 3.78 (3H, s), 3.04 (2H, m), 1.04 (3H, t); MS(ESI): 531 (MH+).

Provenance & Evidence