cobalt‐catalyzed arylation of benzyl chlorides has been developed in order to form functionalized diarylmethanes. A variety of reactive groups either on the aryl or the benzyl halide was employed. This represents the first cobalt‐catalyzed reductive cross‐coupling which does not require any ligand and pyridine. A reaction pathway is proposed involving a radical benzyl species.
Preparation of Functionalized Organomanganese(II) Reagents by Direct Insertion of Manganese to Aromatic and Benzylic Halides
作者:Zhihua Peng、Paul Knochel
DOI:10.1021/ol201109g
日期:2011.6.17
arylmanganese compounds were prepared using commercial manganese powder in the presence of LiCl and catalyticamounts of both 2.5% InCl3 and 2.5% PbCl2 (THF, 0–50 °C). In addition, benzylic manganese reagents are obtained at 25 °C in ca. 70–80% yield (in the absence of LiCl) using commercial manganese powder and catalyticamounts of 2.5% InCl3 and 2.5% PbCl2. The resulting organomanganese reagents undergo