Synthesis of acetylenic β-diketones and their conversion into 4H-pyran-4-ones,pyrazoles, and 1-hydroxy-4-pyridones |
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Authors: | Ibrahim El-Sayed El-Kholy Mohamed Gaber Marei Morcos Michael Mishrikey |
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Abstract: | A simple method for the synthesis of acetylenic β-diketones is described. They can be cyclized to the corresponding 4H-pyran-4-ones with acids. Their reaction with hydrazine hydrate gave pyrazole derivatives isomeric with those obtained from 4H-pyran-4-ones. With hydroxyl-amine hydrochloride in ethanol, 1-hydroxy-4-pyridones are formed. |
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