Cross dehydrogenative coupling of <i>N</i>-aryltetrahydroisoquinolines (sp<sup>3</sup> C–H) with indoles (sp<sup>2</sup> C–H) using a heterogeneous mesoporous manganese oxide catalyst
作者:B. Dutta、V. Sharma、N. Sassu、Y. Dang、C. Weerakkody、J. Macharia、R. Miao、A. R. Howell、S. L. Suib
DOI:10.1039/c7gc01919j
日期:——
heterogeneous catalytic approach for selective coupling of C1 of N-aryltetrahydroisoquinolines with C3 of indoles in the presence of mesoporous manganese oxides. Our work involves a detailed mechanistic investigation of the reaction on the catalyst surface, backed by DFT computational studies, to understand the superior catalytic activity of manganese oxides.
Solvent-Free Cross-Dehydrogenative Coupling Reactions under High Speed Ball-Milling Conditions Applied to the Synthesis of Functionalized Tetrahydroisoquinolines
作者:Weike Su、Jingbo Yu、Zhenhua Li、Zhijiang Jiang
DOI:10.1021/jo2015533
日期:2011.11.4
Solvent-free reaction using a high-speed ball milling technique has been first applied to cross-dehydrogenative coupling (CDC) reactions between tetrahydroisoquinolines and three types of pronucleophiles such as nitroalkanes, alkynes, and indoles. All coupling products were obtained in good yields at short reaction times (no more than 40 min). When alkynes and indoles were used as pronucleophile, the reactions can be catalyzed efficiently by recoverable copper balls without any additional metal catalyst.