Summary.
(4aα,8aβ,9aβ,10aα)-Tetradecahydro-10-methylacridin, (4aα,8aβ,9aβ,10aα)-10-ethyl-tetradecahydroacridin, (4aα,8aα,9aβ,10aα)-tetradecahydro-10-methylacridine, (4aα,8aα,9aβ,10aα)-10-ethyl-tetradecahydroacridin and their products of protonation with trifluoroacetic acid were studied by 13C NMR spectroscopy. The first two amines give rise to a pair of N-diastereomeric salts, whereas the latter two yield only the salts with equatorial N-alkyl groups. The N-epimeric equilibria of the N-alkyl groups (equatorial-axial) in the salts and in the amines are discussed.
Zusammenfassung.
(4aα,8aβ,9aβ,10aα)-Tetradecahydro-10-methylacridin, (4aα,8aβ,9aβ,10aα)-10-Ethyl-tetradecahydroacridin, (4aα,8aα,9aβ,10aα)-Tetradecahydro-10-methylacridin, (4aα,8aα, 9aβ,10aα)-10-Ethyl-tetradecahydroacridin und deren Protonierungsprodukte mit Trifluoressigsäure wurden 13C-NMR-spektroskopisch untersucht. Die beiden erstgenannten Amine ergeben jeweils ein Paar N-diastereomerer Salze, während aus den beiden letzteren nur die Salze mit äquatorialen N-Alkylgruppen entstehen. Die N-epimeren Gleichgewichte der N-Alkylgruppen (äquatorial-axial) in den Salzen und in den Aminen werden diskutiert.
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Received October 12, 1998. Accepted (revised) November 16, 1998
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Potmischil, F., Herzog, H. & Buddrus, J. Hydroacridines XIX [1]. 13C NMR Spectra of Several N-Alkyl-tetradecahydroacridines and their Protonated Species: Investigation of the N-Epimeric Equilibria of the N-Alkyl Groups in the Amines and in the Salts. Monatshefte fuer Chemie 130, 537–544 (1999). https://doi.org/10.1007/PL00010232
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DOI: https://doi.org/10.1007/PL00010232