Condensation of the benzothiazolium salt (I) with 3-allylrhodanine (II) in the presence of Et3N afforded the benzothiazolylidene rhodanine (III). S-Methylation of (III) was accomplished by treatment with methyl p-toluenesulfonate at 120 C, yielding (IV). This was finally condensed with 1,2-dimethylpyridinium tosylate (V) in the presence of Et3N to provide the title compound.