Synthesis and structural elucidation of novel camphor-derived thioureas

Chirality. 2012 Apr;24(4):307-17. doi: 10.1002/chir.21999. Epub 2012 Feb 17.

Abstract

Nine novel (+)-camphor-derived thioureas have been prepared. 3-((Dimethylamino)methylene)camphor (2) served as the common precursor for the preparation of both, 2-thiourea 15-20 and 3-thiourea functionalized camphor derivatives 6, 7/7', respectively. Starting from 2, the latter were prepared in two or three steps whereas the former in five steps, respectively. Configuration of all novel compounds has been meticulously determined using NMR techniques and/or single crystal X-ray crystallography.