L. Alekseeva, K. Iordanova, K. F. Turchin
Jul 1, 1984
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Journal
Chemistry of Heterocyclic Compounds
Abstract
It was shown by a study of the 1H and 13C spectra of derivatives of 2,3,4,4a,9,9a-hexahydroindeno[2,1-b]-1,4-oxazines that the investigated compounds are mixtures of cis- and trans-isomers. On the basis of a comparison of the chemical shifts of 13C in indanoxazines and stereoisomers of decalin, as well as the values of the spin-spin interaction constants of indanoxazines and indanopiperidine (J4a9a), it was concluded that the cis-isomer predominates in the mixture of isomers.