Benzothiazolium, 3-methyl-2-(methylthio)-, 4-methylbenzenesulfonate (1:1) → Methyl 4-[2-(5-Acetyl-2-ethylaminophenylimino)-5-(3-methyl-3H-benzothiazol-2-ylidene)-4-oxothiazolidin-3-ylmethyl]benzoate

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Reaction Steps

The title compound was prepared from intermediate 4-[2-(5-acetyl-2-ethylaminophenylimino)-4-oxothiazolidin-3-ylmethyl]benzoic acid methyl ester and 3-methyl-2-(methylthio)benzothiazol-3-ium p-toluenesulfonate in a manner similar to Example 45. 1H-NMR (CDCl3): δ 8.03 (2H, d), 7.64–7.70 (2H, m), 7.49–7.55 (3H, m), 7.36 (1H, m), 7.20 (1H, m), 7.08 (1H, d), 6.51 (1H, d), 5.24 (2H, s), 4.15 (1H, br t), 3.91 (3H, s), 3.80 (3H, s), 3.04 (2H, m), 2.51 (3H, s), 1.01 (3H, s); MS(ESI): 573 (MH+).

Provenance & Evidence