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- W2022308987 abstract "Abstract Facile acetylation of a tertiary OH group was found to occur under mild conditions in derivatives of anisatin (I) and neoanisatin (VI), toxic compounds obtained from Illicium Anisatum L. Thus, noranisatin (VIII) and norneoanisatin (XV) gave the diacetate Xa and the monoacetate XVI, respectively. The structural feature of facile acetylation of a tertiary OH group is discussed. An abnormal deshielding effect to a methine proton by a neighbouring acetoxyl group was observed in the NMR spectra. In XV, acetylation of the tertiary OH group on C-5 caused a downfield shift of the C-6 proton by 1·1 ppm. The same phenomenon was observed in compounds II, VIII and XI." @default.
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- W2022308987 date "1968-01-01" @default.
- W2022308987 modified "2023-09-27" @default.
- W2022308987 title "Facile acetylation of a tertiary hydroxyl group and an unusual deshielding phenomenon by an acetoxyl group in NMR spectra" @default.
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- W2022308987 doi "https://doi.org/10.1016/0040-4020(68)88076-7" @default.
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