【摘要】 合成了衣康酸的三种甲酯:衣康酸双甲酯、衣康酸α-单甲酯和衣康酸β-单甲酯.根据它们甲酯基NMR谱中的化学位移和共轭理论,提出了衣康酸中α-羧基的酸性应大于β-羧基酸性的观点.更多还原

【Abstract】 Three methyl itaconatos, namely, dimethyl itaconate, mono-α-mehyl itaconate and mono-β-methyl itaconato, wore synthesized.A view-point was presented that according to the conjugation theory and chemical shifts of methyl-carboxylate groups in their NMR spectra, the acidity of α-carboxyl group in itaconic acid is stronger than that of β-carboxyl group.更多还原