Acyl C→N migration in thioureidomethylation of 2-(4-methylbenzoyl)cyclohexanone
Abstract
The thioureidomethylation of the sodium enolate of 2-(4-methylbenzoyl)cyclohexanone 3 with N-(tosylmethyl)thiourea 1a or N-(azidomethyl)thiourea 2 in acetonitrile results in the unexpected formation of N-(4-methylbenzoyl)-N'-[(2-oxocyclohexyl)methyl]thiourea 6, which was structurally characterised by X-ray diffraction analysis.