CDC Reactions of N-Aryl Tetrahydroisoquinolines Using Catalytic Amounts of DDQ: CH Activation under Aerobic Conditions
作者:Kaliyamoorthy Alagiri、Pradeep Devadig、Kandikere R. Prabhu
DOI:10.1002/chem.201200100
日期:2012.4.23
coupling (CDC) reaction for the formation of CC and CP bonds is disclosed using a catalyticamount of DDQ (10 mol %) underaerobicconditions (see scheme). This unprecedented environmentally benign strategy of using AIBN (10 mol %) and molecular oxygen to regenerate DDQ exhibits a larger substrate scope. For the first time, an efficient utility of 4‐hydroxycoumarins as pronucleophiles for CDC is presented
Iron-catalyzed aerobic oxidative phosphonation of <i>N</i>-aryl tetrahydroisoquinolines
作者:Junjie Cai、Yingle Liu、Yan Jiang、Yi Yang
DOI:10.1080/10426507.2017.1330827
日期:2017.9.2
GRAPHICAL ABSTRACT ABSTRACT We report herein a novel and efficient method for iron-catalyzed aerobic oxidative phosphonation of N-aryl tetrahydroisoquinolines for the synthesis of biologically interesting α-aminophosphonates. This new C–Pbondformation reaction features the employment of a sustainable and cost-effective iron salt [Fe(NO3)3·9H2O] as catalyst, the utilization of air as environmental-benign
Direct oxidative phosphonylation of amines under metal-free conditions
作者:Haolong Wang、Xincheng Li、Fan Wu、Boshun Wan
DOI:10.1016/j.tetlet.2011.11.120
日期:2012.2
Direct oxidation coupling of tertiary amines and dialkyl- or diphenyl-substituted phosphonates was developed. The reaction was mediated by DDQ under roomtemperature. Various phosphonates and N-aryl tetrahydroisoquinolines were tolerated in this reaction, and α-aminophosphonates were obtained with up to 99% yield.
Covalent organic frameworks as metal-free heterogeneous photocatalysts for organic transformations
作者:Yongfeng Zhi、Ziping Li、Xiao Feng、Hong Xia、Yumin Zhang、Zhan Shi、Ying Mu、Xiaoming Liu
DOI:10.1039/c7ta07691f
日期:——
Two-dimensional covalentorganic frameworks (2D-COFs) are excellent candidates for photocatalytic organictransformations due to their periodic columnar π-arrays and ordered nanochannels. Here, we present a novel 2D-COF that features permanent porosity with high surface area and large pore volume, and exhibits a high crystallinity and an excellent stability. Indeed, the new 2D-COF was found to be a
A versatile aerobic catalytic system (I-2 and O-2/TBHP) for C-H functionalization is reported. This CDC (cross-dehydrogentive coupling) reaction is compatible with a large number of nucleophiles and is performed under ambient reaction conditions. The scope of the metal-free CDC is illustrated by synthesizing a variety of functionalized tetrahydroisoquinolines and N,N-dimethylaniline. The highlight of the method is a Friedel-Crafts reaction of phenols and indole with tertiary amines.