4,5-Dimethyl-1,2-phenylenediamine → HCID 178422342, compound

Participants

Reaction Steps

Reaction of 30 g (0.22 mole) of 4,5-dimethyl-1,2-phenylenediamine with potassium ethylxanthate using the method described in Example 10 yielded 19 g of 5,6-dimethyl-2-mercaptobenzimidazole, as confirmed by the nmr and infrared spectra and by elemental analysis. The title compound (591 mg) was prepared by the method of Example 6 using 8-hydroxymethylimidazo[1,2-a]pyridine as the hydrochloride salt and using 1.32 g (7.44 mmole) of 2-mercapto-4-methylbenzimidazole instead of 2-mercapto-5-methoxybenzimidazole. The compound was used in subsequent reactions without further characterization.

Provenance & Evidence