It′s a cinch! The title reaction with azomethineimines 1 uses an operationally simple procedure, based on the combination of the bromide salt of cinchona alkaloids (3) and KOH. The procedure is reliable and general. Trifluoromethyl‐substituted amines can be accessed by a two‐step deprotection of the product (S)‐2.
Copper(I) Zeolites as Heterogeneous and Ligand-Free Catalysts: [3+2] Cycloaddition of Azomethine Imines
作者:Murielle Keller、Abdelkarim Sani Souna Sido、Patrick Pale、Jean Sommer
DOI:10.1002/chem.200802191
日期:2009.3.9
Clicking in zeolites: Copper(I)‐exchanged zeolites proved to be practical and efficientcatalysts for the cycloaddition of azomethine imines with alkynes, providing a convenient access to N,N‐bicyclic pyrazolidinone derivatives (see scheme). With high regioselectivity, 100 % atom economy, and convenient product isolation, this heterogeneously catalyzed version of the Dorn cycloaddition corresponds
Rhodium(III)-Catalyzed Oxidative CH Functionalization of Azomethine Ylides
作者:Wencui Zhen、Fen Wang、Miao Zhao、Zhengyin Du、Xingwei Li
DOI:10.1002/anie.201207204
日期:2012.11.19
Put it on a ring: A rhodium(III) complex can catalyze the oxidative coupling of azomethine imines with olefins, leading to the synthesis of 1,2‐dihydrophthalazines, olefinated aldehydes, or fused pyridines, depending on the conditions used.
Rhodium(III)-Catalyzed Annulation of Azomethine Ylides with Alkynes<i>via</i>CH Activation
作者:Yuye Chen、Fen Wang、Wencui Zhen、Xingwei Li
DOI:10.1002/adsc.201200924
日期:2013.2.1
The rhodium(III)-catalyzed coupling of azomethineylides with alkynes via CH activation has been developed for the synthesis of indenamines in moderate to high yields. The coupled products can be further oxidized to indenones and derivatives.
Solkane® 365mfc (1,1,1,3,3-pentafluorobutane, CF3CH2CF2CH3) is proven to be an environmental benign alternative solvent for the catalyticenantioselectivetrifluoromethylation of azomethineimines 1. High chemical yields and enantioselectivities (up to 96% ee) were achieved by employing previously unknown and structurally simple cinchona alkaloid ammonium salt, N-2-iodobenzylcinchoninium bromide 3d