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Benzodiazepine analogues. Part 18—13C NMR analysis of Schmidt rearrangement products from flavonone analogues

✍ Scribed by Malose J. Mphahlele; Perry T. Kaye

Book ID: 101249766
Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 199 KB
Volume: 36
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199801)36:1<69::aid-omr219>3.0.co;2-s

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✦ Synopsis

13C NMR spectra of 1,4-and 1,5-benzoheterazepinones and their tetrazolo derivatives, prepared by the Schmidt rearrangement of Ñavanone analogues, are reported. The e †ects of the C-ring heteroatoms on the 13C NMR chemical shifts of the ring-expanded products were found to be of diagnostic value in distinguishing the isomeric products from one another and from the corresponding precursors.

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## Abstract The influence of substituents and structure on the ^13^C NMR spectra of four series of benzoxathiepine derivatives has been investigated. Signal assignments in the ^13^C NMR spectra have been facilitated by the use of several predictive methods, permitting comparison of their relative e