13C NMR spectral behavior of N-substituted-4-piperidones in methanol. Possibility of distinguishing between acetal and hemiacetal.

山上知佐子， 杉浦真喜子， 田村嘉鶴…

Index: Chemical and Pharmaceutical Bulletin, , vol. 28, # 9 p. 2653 - 2657

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Abstract

... of the slow amide rotation, as was reported by Hirsch.“ On the other hand, the rotational isomers about the C~N bond of N—acetyl—4~piperidone (If) show different chemical shifts for ... France, 1962, 762; b) J. Zabicky (ed.), “The Chemistry of the Carbon- yl Group,” Vol. ... 2656 Vol. ...

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