数種の複素環キノン類ならびに関連化合物の核磁気共鳴スペクトル : 4-Hydroxy-2-phenylbenzoxazoleならびに1-Hydroxydibenzo-p-p-dioxinのFremy's Saltによる酸化方向 : 複素環キノン類の研究(第4報)

概要

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Examination of the nuclear magnetic resonance (NMR) and the spin system of 12 compounds of heterocyclic quinone (Table I) showed that the quinoid proton signal of such a p-quinone appears as an A_2 singlet or AB quartet, while that of an o-quinone appears as an AX type. Application of this observation to the oxidation products of 4-hydroxy-2-phenylbenzoxazole (II) and 1-hydroxydibenzo-p-dioxin (III) with Fremy's salt leads to the assignment of the p-quinone structures to them. Nuclear magnetic resonance spectra of 16 kinds of heterocyclic compounds containing several methoxy groups (Table II) indicated that the C_4-methoxy signal of the compound bearing a phenyl group at C-3 shifted to a higher magnetic field by the anisotropic effect of the phenyl group at C-3.
公益社団法人日本薬学会の論文
1970-10-25