hydrophobic polymer material) sponge‐supported nanometer‐sized gold can be used as a highlyefficientrecyclablecatalyst for cross‐dehydrogenative coupling of tertiary amines with various nucleophiles in water. This PDMS sponge nanometer gold catalyst can provide much better activity than the free nanometer gold in water. The reaction can be scaled up by using an easy‐to‐build continuous flow reactor
An anthraquinone-containing polymericphotosensitizer (AQ-PHEMA) can catalyze the cross-dehydrogenative-coupling of N-aryl tetrahydroisoquinolines with several nucleophiles (nitromethane, 1-methyl-2-alkyl ketone and dialkyl (aryl) phosphine oxide) efficiently by visible light to afford a series of 1-substituted-2-aryl-1,2,3,4-tetrahydroisoquinolines in good to excellent yields with nice substrate tolerance
Platinum(II) Schiff Base Complexes as Photocatalysts for Visible-Light-Induced Cross-Dehydrogenative Coupling Reactions
作者:Deepak Prakash Shelar、Ting-Ting Li、Yong Chen、Wen-Fu Fu
DOI:10.1002/cplu.201500157
日期:2015.10
Four phosphorescent platinum(II) Schiff base complexes are screened for application in visible-light-induced cross-dehydrogenative coupling (CDC) reactions. Preliminary studies show that, among the four platinum(II) complexes, Pt3 is an efficient catalyst for CDC reactions with oxygen as an oxidant. Light irradiation (λ>420 nm) on a mixture of the PtII complex, tertiaryamine, and a variety of nucleophiles
Facile synthesis of vicinal diamines via oxidation of N-phenyltetrahydroisoquinolines with DDQ
作者:Althea S.-K. Tsang、Matthew H. Todd
DOI:10.1016/j.tetlet.2008.12.101
日期:2009.3
aromatic ring and the C1 carbon being stronger than with the N-aryl ring. Reduction of the β-nitroamines to the corresponding novel chiral vicinal diamines are straightforward. Examination of the reaction by 1H NMR spectroscopy suggested that the reaction proceeds via an iminium ion, which then reacts with nitromethane upon work-up. This information was used to shorten the required reaction time.
N-苯基四氢异喹啉的氧化在DDQ中迅速发生。在环境条件下和在硝基甲烷的存在下,以良好至优异的产率分离出相应的β-硝基胺衍生物。异喹啉和N-苯基取代基的电子性质的变化表明,可以接受广泛的取代基,异喹啉芳族环和C1碳之间的电子连通比N-芳基环更强。将β-硝基胺还原为相应的新型手性邻二胺是直接的。用1检验反应1 H NMR光谱表明该反应通过亚胺离子进行,该亚胺离子随后在处理后与硝基甲烷反应。该信息用于缩短所需的反应时间。
SbCl3-Initiated Csp3
–Csp3
Coupling between N-Aryltetrahydroisoquinolines and Nitroalkanes via the Aerobic Oxidation of sp3
C–H Bond
作者:Yu Yuan、Xiaodong Jia、Qiyuan Ma、Shuwei Zhang、Yuemei Li、Han Ding、Zheng Sun
DOI:10.1055/a-2011-7334
日期:——
through the aerobic oxidation of sp3C–Hbond, providing a series of nitromethylated tetrahydroisoquinoline derivatives in high yields. The results exhibited that SbCl3, as a cheap and commercially available reagent, is an efficient initiator to promote the direct functionalization of sp3 C–Hbond with broad functional group tolerance, which is potentially applied to a wider range of C–Hbond activation