Abstract
Internal cyclization of a nitrogroup was carried out by heating the N-substituted o-nitroanilines (I; RC 6H 11, C 6H 5.CH 2, C 6H 5.CH 2.CH 2, XNH) in the presence of ferrous oxalate 1 (Waterman and Vivian's method) as a potential route to partly hydrogenated nitrogen heterocycles. A mechanism for this type of ring-closure is proposed.
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