Butyl Isothiocyanate → 4-Chloro-3-nitro-1-(4-methyl-2-n-butylamino-5-thiazoloyl)-benzene

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The same compound is also prepared as follows: 11.5 g of n-butyl isothiocyanate are added to 11.4 g of N,N-diethyl-acetamidine, whereupon the mixture becomes exothermic. The mixture is left to stand for 1 hour at 60° and the resulting adduct is used in the following experiment. A mixture of 22.9 g of the crude product and 27.9 g of 4-chloro-3-nitro-phenacyl bromide in 200 ml of isopropanol is refluxed for 2 hours. The solution is worked up as described above, yielding 4-chloro-3-nitro-1-(4-methyl-2-n-butylamino-5-thiazoloyl)-benzene.

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