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A simple synthetic route to benzo[6,7][1,5]diazocino[2,1-a]isoindol-12(14H)-one ring system is developed from readily available starting materials 3-(2-oxo-2-phenylethyl) isobenzofuran-1(3H)-ones and 2-(aminomethyl)aniline catalysed by para-toluenesulfonic acid in toluene in 27-85% yields. The 1H- and 13C-NMR spectra of the final products were assigned using a variety of one and two-dimensional NMR experiments. The distinction between the two potential isomers of the final products was made on the basis of heteronuclear multiple bond connectivity NMR spectra (HMBC).
Original languageEnglish
Pages (from-to)967-979
Number of pages13
Issue number8
Publication statusPublished - 23 Jul 2016


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