Rh(III)-Catalyzed [3 + 2] Spirocyclization of 2H-Imidazoles with 1,3-Diynes for the Synthesis of Spiro-[imidazole-indene] Derivatives
摘要:
An effective strategy to synthesize spirocyclic compounds, [imidazole-4,1'-indene], has been efficaciously developed relied on Rh(III)-catalyzed [3 + 2] spirocyclization of 2H-imidazoles and 1,3-diynes with excellent chemselectivity and regioselectivity. This protocol shows a straightforward way to construct the versatile spirocyclic compounds with wide functional group compatibility, high atom economy, and diverse functionalization of products.
A gold-catalyzedoxidation of arylallenes to form alpha-diketones and aldehydes in good yields is presented. Further directed synthesis of quinoxalines and benzimidazoles, via the condensation of the resulting alpha-diketones and aldehydes with benzene-1,2-diamine, was achieved in high yields.
Rh(III)-Catalyzed [3 + 2] Spirocyclization of 2<i>H</i>-Imidazoles with 1,3-Diynes for the Synthesis of Spiro-[imidazole-indene] Derivatives
作者:Yi Luo、Hao Liu、Jing Zhang、Man Liu、Lin Dong
DOI:10.1021/acs.orglett.0c02805
日期:2020.10.2
An effective strategy to synthesize spirocyclic compounds, [imidazole-4,1'-indene], has been efficaciously developed relied on Rh(III)-catalyzed [3 + 2] spirocyclization of 2H-imidazoles and 1,3-diynes with excellent chemselectivity and regioselectivity. This protocol shows a straightforward way to construct the versatile spirocyclic compounds with wide functional group compatibility, high atom economy, and diverse functionalization of products.