Nickel-catalyzed Carboannulation Reaction of <i>o</i>-Bromobenzyl Zinc Bromide with Unsaturated Compounds
作者:Ruixue Deng、Liangdong Sun、Zhi Li
DOI:10.1021/ol702167t
日期:2007.12.1
A number of indenes have been prepared in good yields by treating o-bromobenzyl zinc bromide 1 with various terminal and internal alkynes in the presence of a nickel catalyst. The nickel-catalyzed carboannulation reaction was successfully extended to the synthesis of indane derivatives by reaction of 1 with acrylates and styrene.
A Robust and Broadly Applicable Cobalt-Catalyzed Cross-Coupling of Functionalized Bench-Stable Organozinc Pivalates with Unsaturated Halides
作者:Jeffrey M. Hammann、Ferdinand H. Lutter、Diana Haas、Paul Knochel
DOI:10.1002/anie.201610324
日期:2017.1.19
We report a robust and broadlyapplicable CoCl2‐catalyzed cross‐coupling between functionalized aryl and heteroaryl zinc pivalates and various electron‐poor aryl and heteroaryl halides (X=Cl, Br, I). Couplings with (E)‐ or (Z)‐bromo‐ or iodo‐alkenes proceed with retention of configuration. Also, alkynyl bromides react with arylzinc pivalates providing arylated alkynes.