- Microwave-mediated derivatization of poly(styrene-co-allyl alcohol), a key step for the soluble polymer-assisted synthesis of heterocycles
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Poly(styrene-co-allyl alcohol) can be readily esterified under classical conditions or under microwave irradiation. Some of the so-obtained polymers are effective precursors for the preparation of various nitrogen and oxygen heterocycles. The recycling of the polymeric auxiliary and its use in combinatorial chemistry are discussed.
- Vanden Eynde, Jean Jacques,Rutot, Delphine
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- ETUDE COMPARATIVE DE LA REACTIVITE DE L'ACETOACETATE D'ETHYLE ET DU 3-AMINOCROTONATE D'ETHYLE VIS-A-VIS DE COMPOSES PYRAZOLONIQUES
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1-phenyl-3-methylpyrazolin-5-one, 1,5-dimethylpyrazolin-3-one and 1-phenyl-pyrazolidin-3,5-dione react with ethyl acetoacetate to yield pyrano pyrazole-6-ones.Starting from 1-phenyl-3-aminopyrazolin-5-one or from 1-methyl-5-aminopyrazolin-3-one, pyrazolo pyridin-6-ones are obtained.When ethyl 3-aminocrotonate instead of ethyl acetoacetate is used, the course of these reactions remains the same in most cases but yields are always higher.
- Maquestiau, A.,Haverbeke, Y. van,Eynde, J.-J. Vanden
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p. 451 - 458
(2007/10/02)
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