Reaction products of 2-methylindole with nitrosobenzenes: a reinvestigation. X-Ray analysis of 2-(phenyl-N-oxidoiminomethyl)-3-phenylaminoindole

Abstract

2-Methylindole reacts with nitrosobenzenes to form 2-(aryl-N-oxidoiminomethyl)-3-arylaminoindoles (4a–d), which were previously described as 2-methyl-3-arylimino-3H-indoles (3e and f). The new structure was determined by X-ray analysis. The geometry of the molecule is discussed in comparison with those reported in the literature for 2,3-diphenylindole, 3-arylaminoindoles, and analogous nitrone systems.