Lewis Acid Catalyzed Formation of Tetrahydroquinolines via an Intramolecular Redox Process
作者:Sandip Murarka、Chen Zhang、Marlena D. Konieczynska、Daniel Seidel
DOI:10.1021/ol802519r
日期:2009.1.1
Polycyclic tetrahydroquinolines were prepared by an efficient Lewis acid catalyzed 1,5-hydride shift, ring closure sequence. Gadolinium triflate was Identified as a catalyst that Is superior to scandium triflate as well as other Lewis acids. An approach toward a catalytic enantioselective variant Is also described.
作者:Nadezhda S. Baleeva、Alexander Yu. Smirnov、Elvira R. Zaitseva、Dmitrii S. Ivanov、Anatolii I. Sokolov、Andrey A. Mikhaylov、Ivan N Myasnyanko、Mikhail S. Baranov
DOI:10.1039/d3nj01837g
日期:——
ortho-Dialkylaminoarylidene malonates undergo hydrogen transfer mediated cyclization in the absence of a catalyst under LED irradiation. This activation mode is found to be relatively general and could be applied to a number of other acceptor motifs in the arylidene substrates tested. Variation of the light source wavelength opens an extra option for fine tuning of the reaction conditions, making the
邻二烷基氨基亚芳基丙二酸酯在没有催化剂的情况下在 LED 照射下经历氢转移介导的环化。发现这种激活模式相对通用,并且可以应用于测试的亚芳基底物中的许多其他受体基序。光源波长的变化为反应条件的微调提供了额外的选择,使得所描述的方法几乎通用。