Benzenamine, 3-(methylthio)- → HCID 70578334, compound

Participants

Reaction Steps

Using the methods described in Example 11 and Example 12, 3-methylthioaniline was converted to methyl 3-(3-methylthioanilino)-2-methylthioacrylate, m.p. 90°-92°. This acrylate was cyclised to give 3,7-bis(methylthio)4-quinolone, m.p. 197°-200°, containing the corresponding 5-methylthio isomer. This product was methylated with dimethyl sulphate in aqueous potassium hydroxide at room temperature to give a mixture of 1-methyl-3,7-bis (methylthio)-4-quinolone and 1-methyl-3,5-bis(methylthio)-4-quinolone. This mixture was separated by high pressure liquid chromatography to give 1-methyl-3,7-bis(methylthio)-4-quinolone, m.p. 154°-155° (from ethanol). Oxidation of this compound with 3-chloroper benzoic acid gave 1-methyl-3-methylsulphinyl-7-methylthio-4-quinolone, m.p. 196°-198° (from ethanol).

Provenance & Evidence