作者:M.F. Semmelhack、G.R. Clark、J.L. Garcia、J.J. Harrison、Y. Thebtaranonth、W. Wulff、A. Yamashita
DOI:10.1016/s0040-4020(01)93270-3
日期:——
electrophilic reactivity of arenes coordinated to the chromium tricarbonyl unit has been developed into several distinct methods for coupling carbon nucleophiles with aromatic rings. Addition of the nucleophile produces stable η5-cyclohexadienyl chromium complexes which can be oxidized to induce loss of the endo hydrogen and the metal, overall nucleophilic substitution for hydrogen. Alternatively, the intermediate
与三羰基铬单元配位的芳烃的亲电子反应性已发展为几种将碳亲核试剂与芳环偶联的独特方法。亲核试剂的加成产生稳定η 5 -cyclohexadienyl铬配合物可被氧化,以诱导的损耗内切氢和金属,氢的整体亲核取代。或者,可以使中间体质子化并且可以将所得的环己-1,3-二烯与铬分离,从而通过减少一个双键实现亲核加成。如果卤素(F,Cl)作为环取代基存在,并且如果亲核试剂可以在芳烃配体周围迁移,那么卤化物的损失会与电子缺陷型卤代芳烃中卤素的经典亲核芳族取代反应平行发生。