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            Discovery, optimization, and early development of drug candidates are very challenging
               and require a versatile synthetic chemistry toolbox. Organozinc chemistry is a powerful
               methodology for carbon–carbon bond formation which tolerates several functional groups
               that are critical for maintaining good physicochemical properties of drug molecules.
               Here we demonstrate that organozinc chemistry offers facile solutions to otherwise
               challenging medicinal chemistry problems commonly encountered during lead optimization.
               In this review, we summarize several examples in which utilization of organozinc-mediated
               couplings enabled us to rapidly explore a medicinal chemistry hypothesis using readily
               available intermediates. This chemistry allowed us to make rapid decisions with limited
               chemistry resources.
            
            1	Introduction
            
            2.1	Alpha4 Integrin Antagonists
            
            2.2	CRTH2 Antagonists
            
            2.3	Glucokinase (GK) Activators
            
            2.4	Leukotriene B4 (LTB4) Receptor Antagonists
            
            2.5	Janus Activated Kinase 3 (JAK3) Inhibitors
            
            2.6	Synthesis of Novel Scaffolds
            
            3	Conclusions
            
            4	Experimental Methods
            
         
         Key words
organozinc - integrins - antagonists - activators - inhibitors