Abstract
Abstract5‐Nitro‐, 3‐methyl‐5‐nitro‐, 5, 7‐dinitro‐, 5‐chloro‐8‐nitro‐ and 8‐chloro‐5‐nitroisoquinoline (1a–e) as well as 5‐nitroisoquinoline N‐oxide (1f) are aminated with a liquid methylamine solution of potassium permanganate (LMA/PP) to the corresponding mono‐ or mono‐ and bis(methylamino)‐substituted nitro compounds 2 (a–m). 1‐Nitroisoquinoline (1g) is aminated with LMA/PP to 1‐(methylamino)isoquinoline (2n). Quantum‐chemical calculations for some mononitroisoquinolines suggest that, in general, the experimentally observed regioselectivity of the amination is controlled by an interaction of frontal molecular orbitals (FMO) of the reagents. magnified image
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