A combination of 10 % CoCl2 and 20 % 2,2'-bipyridine ligands enables cross-coupling of functionalized primary and secondary alkylzinc reagents with various (hetero)aryl halides. Couplings with 1,3- and 1,4-substituted cycloalkylzinc reagents proceeded diastereoselectively leading to functionalized heterocycles with high diastereoselectivities of up to 98:2. Furthermore, alkynyl bromides react with
10%CoCl2和20%
2,2'-联吡啶配体的组合可实现官能化的伯烷基
锌试剂和仲烷基
锌试剂与各种(杂)芳基卤化物的交叉偶联。与1,3-和1,4-取代的
环烷基
锌试剂的偶联进行非对映选择性,导致官能化的杂环具有高达98:2的高非对映选择性。此外,炔基
溴化物与伯和仲烷基
锌试剂反应,提供烷基化的
炔烃。