Palladium Catalyzed Direct Acylation of Iodo-Acetanilides/Iodo-Phenyl Acetates: Domino One-Pot Synthesis of 2-Quinolinones
作者:Scuhand Basuli、Gedu Satyanarayana
DOI:10.1002/ejoc.201701250
日期:2018.2.28
acetates with aldehydes, was presented. Simple bench-top aldehydes were used as the non-toxic acylating agents. This protocol comprises direct coupling with aldehydes without activating the carbonyl group and without the directing group assistance. The strategy was applied to a domino one-potsynthesis of 2-quinolinones via acylation and intramolecularaldolcondensation. Significantly, the strategy was extended
Palladium-Catalyzed Direct <i>ortho</i>-Acylation through an Oxidative Coupling of Acetanilides with Toluene Derivatives
作者:Zhangwei Yin、Peipei Sun
DOI:10.1021/jo302125h
日期:2012.12.21
A facile ortho-acylation of acetanilides by a Pd-catalyzed oxidative C–H activation was developed in which low toxic, stable, and commercially available toluene derivatives were first used as acylation reagents by a tandem reaction to form o-acylacetanilides with moderate to good yields. Inexpensive, safe, and environmentally benign TBHP was proved to be an effective oxidant for these transformations
Palladium-Catalyzed ortho-Acylation of Acetanilides with Aldehydes through Direct CH Bond Activation
作者:Chengliang Li、Lei Wang、Pinhua Li、Wei Zhou
DOI:10.1002/chem.201101192
日期:2011.9.5
Easy access to o‐acyl acetanilides: A new Pd‐catalyzed ortho‐acylation of acetanilides with both aromatic and aliphatic aldehydes has been developed based on a CH activation process. In the presence of tert‐butyl hydroperoxide (TBHP) as the ideal oxidant, this reaction provides an efficient access to ortho‐acyl acetanilides in good yields (see scheme).
Activation of C–H Activation: The Beneficial Effect of Catalytic Amount of Triaryl Boranes on Palladium-Catalyzed C–H Activation
作者:Orsolya Tischler、Zsófia Bokányi、Zoltán Novák
DOI:10.1021/acs.organomet.5b01017
日期:2016.3.14
Herein we report a novel approach to the acceleration of palladium-catalyzed C-H activation reactions. We demonstrated that the utilization of electron-deficient triaryl boranes as Lewis acidic cocatalysts of palladium enables the directed cross dehydrogenative coupling of aldehydes and anilides under mild reaction conditions. Study of the kinetic profile of the transformation reveals a unique, unexpectedly long induction period of the transformation.
Palladium-catalyzed direct oxidative ortho-acylation of anilides with toluene derivatives
Direct oxidative ortho-acylation reaction of anilides with toluene derivatives in the presence of palladium acetate using tert-butyl hydroperoxide as an oxidant was developed. A broad range of diaryl ketones was obtained in good to excellent yields (up to 95%). The plausible mechanism was also proposed. (C) 2012 Elsevier Ltd. All rights reserved.