A new and efficient preparation of 2-aminothiazole-5-carbamides: applications to the synthesis of the anti-cancer drug dasatinib: Bang-Chi Chen*a Rulin Zhao,a Bei Wang,a Roberto Droghini,b Jean Lajeunesse,bPierre Sirard,b Masaki Endo,b Balu Balasubramanian,a and Joel C. Barrish; Author Affliations: aDiscovery Chemistry, Bristol-Myers Squibb Research and Development, Princeton, NJ 08543, USA; bProcess Research and Development, Bristol-Myers Squibb Pharmaceutical Research Institute, Candiac, Quebec J5R1J1, Canada