Gold(I)-Catalyzed Unprecedented Rearrangement Reaction Between 2-Aminobenzaldehydes with Propargyl Amines: An Expedient Route to 3-Aminoquinolines
作者:Nitin T. Patil、Vivek S. Raut、Valmik S. Shinde、Gaddamanugu Gayatri、G. Narahari Sastry
DOI:10.1002/chem.201103668
日期:2012.4.27
aminoquinolines: A gold(I)‐catalyzed unprecedented rearrangementreaction between 2‐aminobenzaldehydes with propargyl amine was studied. The study provided, for the first time, direct access to 3‐aminoquinolines in one step starting from readily available starting materials (see scheme). Elegantly designed experiments were employed to unravel the mechanism of this unprecedented rearrangement, which are corroborated
electrophilic mono and dialkylations of quinolines with various 2- or 4-functionalized aryl carbonyls or benzyl alcohols by utilizing renewable formic acid as the reductant. This catalytic transformation offers a practical platform for direct access to a vast range of alkyl THQs, proceeding with excellent step and atom-efficiency, good substrate scope and functional group tolerance, a reusable catalyst and abundantly
在不饱和系统的还原中加入偶联步骤为功能分子的多样化合成提供了一种理想的方法,但由于难以控制化学选择性,迄今为止仍然是一个挑战。在此,通过开发由 Ir 物种(Ir δ +)和 N 掺杂的 SiO 2 /TiO 2载体(Ir/N-SiO 2 /TiO 2),我们描述了其通过利用可再生甲酸作为还原剂,在喹啉与各种 2-或 4-官能化芳基羰基或苯甲醇的还原亲电单和二烷基化反应中的应用。这种催化转化为直接获得各种烷基 THQ 提供了一个实用的平台,具有出色的步骤和原子效率、良好的底物范围和官能团耐受性、可重复使用的催化剂和大量可用的原料,以及水和二氧化碳的生成作为副产品。这项工作为在多相还原催化下进一步开发更有用的有机转化打开了一扇门。
Mayer; Schaefer; Rosenbach, Archiv der Pharmazie, 1929, p. 583
作者:Mayer、Schaefer、Rosenbach
DOI:——
日期:——
ADELSTEIN, GILBERT W.;YEN, CHUNG H.;HAACK, RICHARD A.;YU, STELLA;GULLIKSO+, J. MED. CHEM., 31,(1988) N 6, 1215-1220
作者:ADELSTEIN, GILBERT W.、YEN, CHUNG H.、HAACK, RICHARD A.、YU, STELLA、GULLIKSO+
DOI:——
日期:——
Pendant Alkoxy Groups on N‐Aryl Substitutions Drive the Efficiency of Imidazolylidene Catalysts for Homoenolate Annulation from Enal and Aldehyde
a critical step affecting the efficiency of the NHC‐catalyzed γ‐butyrolactone formation via homoenolate addition to aryl aldehydes. A novel type of imidazolylidene catalyst with pendant alkoxy groups on the ortho‐N‐aryl groups is described. Catalyst of this sort facilitates the formation of the conjugated Breslow intermediate. Studies of the rate constants for homoenolate annulation affording γ‐butyrolactones