The Effect of Onium Salt Additives on the Diels-Alder Reactions of a 1-Phenyl-1,2-dihydrophosphinine Oxide under Microwave Conditions |
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| Authors: | Emília Hohmann György Keglevich István Greiner |
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| Affiliation: | 1. Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary;2. Gedeon Richter Plc. , Budapest , Hungary |
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| Abstract: | The microwave absorbing ability of toluene is increased in the presence of a slight amount (2–4 mg/3 mL) of quaternary ammonium or phosphonium salts. These additives somewhat accelerated the Diels-Alder reaction of 1-phenyl-1,2-dihydrophosphinine oxide 1 with N-phenylmaleimide and maleic acid anhydride to afford phosphabicyclo[2.2.2]octene derivatives. |
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| Keywords: | 1,2-Dihydrophosphinine oxide Diels-Alder reaction microwave onium salt phosphabicyclo[2.2.2]octene |
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