Regioselective addtion of 5-amino-3-benzylthio-l,2,4-triazole and its analogues with aryl isocyanates-中国期刊网

摘要 Theorientationoftheadditionof5-amino-3-benzylthio-1,2,4-triazoleanditsanalogues(pyrazole)(1)withthearylisocyanatecanbedirectedbycontrollingthereactiontemperatureandoneoftheproduct,5-amino-1-arylaminocarbonyl-3-benzylthio-1,2,4-triazole(pyrazole)(2),canrearrangeat170Ctoanotherproduct,5-arylureylene-3-benzylthio-1,2,4-triazole(pyrazole)(3).Aplausiblemechanismexplanationforthisrearrangementreactionwaspresented.Itwassuggestedthattherearrangementreactioncouldbereferredtothethermodynamicstranspositionleadingtothepredominant5-arylureylene-3-benzylthio-1,2,4-triazoleenergypreferentially.

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Regioselective addtion of 5-amino-3-benzylthio-l,2,4-triazole and its analogues with aryl isocyanates

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Regioselective addtion of 5-amino-3-benzylthio-l,2,4-triazole and its analogues with aryl isocyanates

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