Synthesis of unsymmetrical heterobiaryls using palladium-catalyzed cross-coupling reactions of lithium organozincates.
[摘要]:Several unsym. heterobiaryls were synthesized through Pd-catalyzed cross-coupling of Li triorganozincates. The latter were prepd. by deprotonative lithiation followed by transmetalation using non-hygroscopic ZnCl2.TMEDA (0.33 equiv).
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