Summary.
Bis-hydrazonoyl chlorides react regioselectively with pyrimidine-2-thiones, which contain a masked thiourea residue, to give the hitherto unknown annelated 2,3-bis-arylhydrazono-thiazoles and 3,3′-bis-1,2,4-triazoles. Reaction of bis-hydrazonoyl chlorides with 2-methylthio derivatives gave only 3,3′-bis-1,2,4-triazoles.
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Received October 4, 2000. Accepted (revised) December 20, 2000
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Shawali, A., Hilal, R. & El-Sheikh, S. Regioselectivity in the Reactions of Bis-hydrazonoyl Halides with Pyrimidine-2-thiones. Monatshefte fuer Chemie 132, 715–720 (2001). https://doi.org/10.1007/s007060170086
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DOI: https://doi.org/10.1007/s007060170086