The aldo-cis-trans-enolic equilibrium of substituted alkyl formylacetates and alkyl formylmethylphosphonates
作者:S.T. Yoffe、P.V. Petrovsky、Ye.I. Goryunov、T.V. Yershova、M.I. Kabachnik
DOI:10.1016/0040-4020(72)80114-5
日期:1972.1
A number of substituted ethyl formylacetates and ethyl formylmethylphosphonates were synthesized and their enolization studied by NMR. The ethyl halogen-or cyan)-formylacetates and formylmethylphosphonates exhibited stable trans-enolic forms in solutions. Variation of groupings bonded to the CO or PO groups affect the chelating centre basicity. With higher basicity the cis-enolic form is stabilized
合成了许多取代的甲酰基乙酸乙酯和甲酰基甲基膦酸乙酯,并通过NMR对其烯醇化进行了研究。卤代乙基或氰基-甲酰基乙酸乙酯和甲酰基甲基膦酸酯在溶液中表现出稳定的反式-烯醇式。结合到CO或PO基团上的基团的变化会影响螯合中心的碱度。在较高的碱度下,顺式-烯醇式稳定,反之亦然。分子间的氢键稳定了含有磷酰基的化合物的反烯醇形式。