Abstract
AbstractSeveral series of novel biheterocyclic compounds have been synthesized starting from 3‐alkoxy‐1H‐pyrazole‐4‐carbaldehydes and employing different types of multicomponent reactions. The structures of the obtained 4‐(pyrazol‐4‐yl)pyrano[2,3‐c]pyrazole, 4‐(pyrazol‐4‐yl)pyrazolo[4′,3′:5,6]pyrano[2,3‐b]quinoline, 4‐(pyrazol‐4‐yl)pyridine, and 4‐[(pyrazol‐4‐yl)methylidene]‐1,2‐oxazole derivatives were thoroughly characterized and confirmed using detailed nuclear magnetic resonance spectroscopy (NMR), high‐resolution mass spectrometry (HRMS), infrared spectroscopy (IR), and X‐ray analysis.
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