Synthesis of 7-[4-alkoxy-3-methoxy(hydroxy)phenyl]-10,11-dihydrobenzo[c]acridin-8(7H,9H,12H)-ones and 4-(8-oxo-7,8,9,10,11,12-hexahydrobenzo[c]acridin-7-yl)-2-methoxy(ethoxy)phenyl esters of carboxylic acids

Author： Kozlov N.   Basalaeva L.   Odnoburtsev B.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1070-4280

Source： Russian Journal of Organic Chemistry, Vol.46, Iss.5, 2010-05, pp. : 740-745

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Abstract

Reactions of azomethines (Schiff bases) prepared from vanillin and vanillal ethers and 1-naphthylamine with cyclohexane-1,3-dione in butanol afforded in 40–64% yields 7-[4-alkoxy-3-methoxy(hydroxy)phenyl]-10,11-dihydrobenzo[c]acridin-8(7H,9H,12H)-ones and 4-(8-oxo-7,8,9,10,11,12-hexahydrobenzo[C]acridin-7-yl)-2-methoxy(ethoxy)phenyl esters of carboxylic acids. The reaction products presumably formed by the rearrangement of the azomethine adduct with the cyclohexane-1,3-dione proceeding by the type of Hofmann-Martius rearrangement. The structure of compounds synthesized was confirmed by the elemental analysis, UV, IR, and 1H NMR spectra.

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