Dihydroindol-7(6H)-ones and 6,7-Dihydropyrrolo[2,3-c]azepine-4,8(1H,5H)-dione

Abstract
3-Methylcyclohexenones may be converted into dihydroindol-7(6H)-ones by conversion of the epoxide into the 2-benzylamino-3-methylcyclohexenone, which reacts with dimethyl- formamide dimethyl acetal to give N-benzyldihydroindol-7(6H)-ones. The limitations of the process are discussed, as is the failure to convert the dihydroindol-7(6H)-ones into dihydropyrroloazepinediones by Beckmann or Schmidt rearrangements. An example of the latter compounds was made by a simple procedure from pyrrolecarboxylic acid.

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