Abstract
Abstract Exclusive formation of 2-heteroarylaminobenzothiazoles is observed when N-aryl-N′-heteroarylthioureas are treated with NBS/H2SO4. A possible explanation to account for the lack of 1,2,4-thiadiazole formation is offered, and a previous report3 concerning the oxidation of N-phenyl-N′-(2-pyridyl)thiourea is shown to be erroneous.
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