Palladium-Catalyzed Cross-Couplings of Lithium Arylzincates with Aromatic Halides: Synthesis of Analogues of Isomeridianin G and Evaluation as GSK-3β Inhibitors
Several analogues of isomeridianin G have been synthesized using palladium-catalyzedcross-couplingreactions of lithium triorganozincates as a key step. The latter have been prepared by deprotonative lithiation followed by transmetalation using ZnCl2˙TMEDA (0.33 equiv). cross-coupling - heterocycles - palladium - zinc - lithium