Combinatorial synthesis of small organic molecules has evolved rapidly in the last few years to become a new paradigm for contemporary drug discovery. 1 For this reason, increasing attention is currently devoted to this technique. 2 Some of us previously reported the use of modified Merrifield resin in the preparation of polymer-bound β-dicarbonyl derivatives from which some heterocyclic products were obtained. 3 Since 1,2-diaza-1,3-butadienes showed to be useful building ...
