Étude par rmn de l'influence des solvants et de la température sur l'équilibre cis-trans d'énaminocétones et d'énaminothiones. marquage à l'azote-15

作者: M.L. Filleux-Blanchard , H. Durand , M.T. Bergeon , F. Clesse , H. Quiniou

DOI: 10.1016/0022-2860(69)87031-6

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摘要: Resume L'equilibre tautomere enaminocetone-enolimine est etudie par resonance magnetique nucleaire dans la serie RC(A)CHCHNHR' (A = O, S). La determination des deplacements chimiques et constantes de couplage le marquage echantillons a l'azote-15 prouvent predominance d'une forme enaminocetone ou thione chelatee. tendance solvants basiques rompre chelation, conjuguee l'accroissement constante dielectrique, favorisent l'isomerisation en une laquelle les protons ethyleniques sont position trans.

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