A relay catalytic cascade process involving Lewis acid triggered ring-opening of cyclopropyl ketones with nitriles, the copper(I)-catalyzed Ritter process, and acid-promoted N-acyliminium ion cyclization is described, which efficiently provides thieno-, furano-, and benzo-indolizinones in moderate to good yields.
Copper(<scp>i</scp>)/Lewis acid triggered ring-opening coupling reaction of cyclopropenes with nitriles
作者:Huawen Huang、Xiaochen Ji、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c5ra01541c
日期:——
A ring-opening coupling reaction of D–A cyclopropenes and nitriles is described for the facile synthesis of γ-amino ketones. The co-catalytic system combining copper(I) and boron trifluoride would be inspiring because it disfavors the [3 + 2] cycloaddition to turn the selectivity over the Ritter process.
Amide Oxygen-Assisted Palladium-Catalyzed Hydration of Alkynes
作者:Zhenming Zhang、Lihuan Wu、Jianhua Liao、Wanqing Wu、Huanfeng Jiang、Jianxiao Li、Jiawei Li
DOI:10.1021/acs.joc.5b01178
日期:2015.8.7
oxygen-assisted palladium-catalyzed hydration reaction of alkynes is realized to prepare a series of o-acylacetanilide derivatives with high yield, and single regioselectivity under mild reaction conditions. This transformation is simple, practical, and can be performed on a gram scale. Evaluation of the mechanism shows that the reaction should involve an oxypalladation process, and the 1,3-oxazine compound