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1 Introduction We developed novel synthetic routes to heterocyclic ring systems by using transition metal-mediated or -catalyzed reactions.A Lewis acid-promoted addition of the propargyl Grignard reagent 2 to the Schiff base 1 followed by a silver-mediate
1 Introduction We developed novel synthetic routes to heterocyclic ring systems by using transition metal-mediated or -catalyzed reactions. A Lewis acid-promoted addition of the propargyl Grignard reagent 2 to the Schiff base 1 followed by a silver-mediate