Abstract
AbstractTreatment of 1‐chlorohydrazones (IIa‐c) with triethylamine gave fused ring 1,2,4‐triazoles arising from an intramolecular cycloaddition of the intermediate nitrile imines (IIIa‐c). This reaction was not observed in the case of one compound (IId) bearing an unactivated nitrile group.
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