Synthesis of Imidazolidine-2-(thi)ones via C2-Selective Oxidation and Thionation of 2-Imidazolinium Halides - Mooijman, Maurice; Bon, Robin S.; Sprenkels, Nanda E.; van Oosterhout, Hugo N.; de Kanter, Frans J. J.; Groen, Marinus B.; Ruijter, Eelco; Orru, Romano V. A. (Synlett, 2012)