Iron-Catalyzed Cross-Coupling of Functionalized Benzylmanganese Halides with Alkenyl Iodides, Bromides, and Triflates
作者:Alexandre Desaintjean、Sophia Belrhomari、Lidie Rousseau、Guillaume Lefèvre、Paul Knochel
DOI:10.1021/acs.orglett.9b03292
日期:2019.11.1
substituted benzylic manganese chlorides were prepared by insertion of magnesium turnings in the presence of MnCl2·2LiCl in THF at −5 °C within 2 h. These benzylic manganese reagents underwent smooth cross-couplings with various functionalized alkenyl iodides, bromides, and triflates or iodoacrylates in the presence of 10 mol % FeCl2 at 25 °C for 1–12 h. Mechanistic studies showed that benzylic manganese
在MnCl 2 ·2LiCl的存在下,在-5°C的THF中,在2小时内插入镁屑,制备了各种取代的苄基氯化锰。这些苄基锰试剂在25℃下在10 mol%FeCl 2存在下与各种官能化的烯基碘化物,溴化物和三氟甲酸酯或碘丙烯酸酯进行平滑的交叉偶联1–12小时。机理研究表明,在FeCl 2的存在下,苄基卤化锰产生了一种非常活泼的铁酸盐络合物。