Synthesis of Substituted Isoquinolines via Pd-Catalyzed Cross-Coupling Approaches
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Palladium complexes incorporating ligands based on a 1,3,5,7-tetramethyl-2,4,8-trioxa-6-phosphaadamantanyl scaffold were used to catalyze the arylation of ethyl cyanoacetate, malononitrile, and various ketones. The products from these reactions can be elaborated to substituted β-arylethylamines and used in microwave-assisted Pictet-Spengler reactions. The protocol developed is suitable for the synthesis of libraries of substituted isoquinolines.
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