Continuous Flow Preparation of (Hetero)benzylic Lithiums via Iodine–Lithium Exchange Reaction under Barbier Conditions
作者:Niels Weidmann、Johannes H. Harenberg、Paul Knochel
DOI:10.1021/acs.orglett.0c01991
日期:2020.8.7
benzylic lithiums via an iodine–lithium exchange reaction on benzylic iodides performed in continuous flow using tBuLi as the exchange reagent. The resulting benzylic lithium species are trapped in situ by carbonyl electrophiles under Barbier conditions, resulting in benzylic secondary and tertiary alcohols. This flow procedure further allows the generation of highly reactive heterobenzylic lithium compounds
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