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- W2038862597 abstract "La tautomérie cycle-chaîne en série hydroxy-5 isoxazoline-2 est étudiée. Une augmentation du volume et du nombre des substituants favorise en général la forme cyclique par introduction de gênes aux libres rotations autour des simples liaisons de la forme ouverte; une exaltation de cet effet est notée lors de l'introduction de deux méthyles en 4 (effet gem-diméthyle). Le substituant en 5 intervient aussi par ses effets stériquest et électroniques sur la réactivité du carbonyle de la forme ouverte. The ring-chain tautomerism of 5-hydroxy-2-isoxazolines has been investigated. By increasing bulk and/or number of substituents, the ring tautomer is generally favoured due to conformational factors in the chain tautomer. Introduction of two methyl groups at position 4 produces an exaltation of this effect (gem-dimethyl effect). The 5-substituent has also a steric and electronic influence on the reactivity of the chain carbonyl group." @default.
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- W2038862597 date "1976-01-01" @default.
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- W2038862597 title "Influence des substituants sur la tautomerie cycle-chaine en serie hydroxy-5 isoxazoline-2" @default.
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- W2038862597 doi "https://doi.org/10.1016/0040-4020(76)85012-0" @default.
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