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- W2154401291 abstract "Abstract Microwave irradiation under solvent‐free conditions induces 1‐acetyl‐4‐styrylpyrazoles to undergo Diels–Alder cycloaddition reactions with N ‐methyl‐ or N ‐phenylmaleimide to give tetrahydroindazoles in good yields and with high selectivities. With conventional heating, these reactions either do not occur or afford only traces of the cycloadducts. These cycloadducts were then converted into the corresponding 1 H ‐indazoles by dehydrogenation with DDQ in dry 1,2,4‐trichlorobenzene under microwave irradiation or classical heating conditions. The structures of all new derivatives and the stereochemistries of the cycloadducts were assigned by NMR spectroscopy. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)" @default.
- W2154401291 created "2016-06-24" @default.
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- W2154401291 date "2009-08-24" @default.
- W2154401291 modified "2023-10-11" @default.
- W2154401291 title "Synthesis of New 1<i>H</i>‐Indazoles through Diels–Alder Transformations of 4‐Styrylpyrazoles under Microwave Irradiation Conditions" @default.
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- W2154401291 doi "https://doi.org/10.1002/ejoc.200900513" @default.
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