Synthesis of 6-Substituted Imidazo[2,1-b][1,3]thiazoles and 2-Substituted Imidazo[2,1-b][1,3]benzothiazoles via Pd/Cu-Mediated Sonogashira Coupling - Kamali, Taghi A.; Habibi, Davood; Nasrollahzadeh, Mahmoud (Synlett, 2009)