Journal ArticleDOI
Dimethylformamide as a carbon monoxide source in fast palladium-catalyzed aminocarbonylations of aryl bromides
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TLDR
The carbonylation procedure reported herein, which relies on the in situ generation of carbon monoxide, serves as a convenient alternative to othercarbonylation methods and is particularly applicable to small-scale reactions where short reaction times are desired and the direct use of carbonmonoxide gas is impractical.Abstract:
Dimethylformamide (DMF) acts as an efficient source of carbon monoxide and dimethylamine in the palladium-catalyzed aminocarbonylation (Heck carbonylation) of p-tolyl bromide to provide the dimethylamide. Addition of amines to the reaction mixture in excess delivers the corresponding aryl amides in good yields. The amines employed, benzylamine, morpholine, and aniline, all constitute good reaction partners. The reaction proceeds smoothly with bromobenzene and more electron-rich aryl bromides, but electron-deficient aryl bromides fail to undergo aminocarbonylation. The reactions are conducted at 180-190 degrees C for 15-20 min with microwave heating in a reaction mixture containing imidazole and potassium tert-butoxide: the latter is required to promote decomposition of the DMF solvent at a suitable rate. The beneficial effects of controlled microwave irradiation as an energy source for the rapid heating of the carbonylation reaction mixture are demonstrated. The carbonylation procedure reported herein, which relies on the in situ generation of carbon monoxide, serves as a convenient alternative to other carbonylation methods and is particularly applicable to small-scale reactions where short reaction times are desired and the direct use of carbon monoxide gas is impractical.read more
Citations
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Photoinduced energy and electron transfer in porphyrin-anthraquinone dyads bridged with a triazine group
TL;DR: Porphyrin-anthraquinone dyads containing a triazine group as linker were synthesized and characterized by 1 H-NMR, UV-visible, fluorescence and transient spectra and ESI-MS as mentioned in this paper.
Journal ArticleDOI
Base‐Promoted Carbonylative Cyclization of Propargylic Amines with Selenium under CO Gas‐free Conditions
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Copper-catalyzed formation of N,N-dimethyl benzamide from nitrile and DMF under an O2 atmosphere
TL;DR: Amidation of nitrile with N,N-dimethylformamide (DMF) was catalyzed by Cu2O with 1,10-phenanthroline as a ligand under an oxygen atmosphere to obtain a variety of N, N-Dimethyl benzamides.
Journal ArticleDOI
Oxalic acid as the in situ carbon monoxide generator in palladium-catalyzed hydroxycarbonylation of arylhalides.
TL;DR: An efficient palladium-catalyzed hydroxycarbonylation reaction of arylhalides using oxalic acid as a CO source has been developed that provides a safe and tractable approach to access a variety of aromatic carboxylic acid compounds.
Journal ArticleDOI
A new approach for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid without using transition metal catalysts
Lu Zhang,Xiaolan Luo,Yebo Li +2 more
TL;DR: A transition metal-free synthesis strategy for the oxidation of 5-hydroxymethylfurfural (HMF) to FDCA under O2 or ambient air was reported in this paper.
References
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Journal ArticleDOI
Progress in hydroformylation and carbonylation
TL;DR: The last 15 years of hydroformylation and carbonylation chemistry are reviewed in this article, including technical and commercial aspects, and the authors present a review of the most relevant papers.
Journal ArticleDOI
Developments in Microwave-Assisted Organic Chemistry
TL;DR: The CSIRO continuous microwave reactor (CMR) and microwave batch reactor (MBR) were developed for organic synthesis and operated at temperatures up to 200°C (1400 kPa) and 260°C(10 MPa) respectively as discussed by the authors.
Journal ArticleDOI
Microwave-assisted high-speed chemistry: a new technique in drug discovery.
Mats Larhed,Anders Hallberg +1 more
TL;DR: It is believed that the time saved by using focused microwaves is potentially important in traditional organic synthesis but could be of even greater importance in high-speed combinatorial and medicinal chemistry.
Journal ArticleDOI
Microwave-Promoted Palladium-Catalyzed Coupling Reactions
Mats Larhed,Anders Hallberg +1 more
Journal ArticleDOI
Fast Microwave-Assisted Preparation of Aryl and Vinyl Nitriles and the Corresponding Tetrazoles from Organo-halides
Mathias Alterman,Anders Hallberg +1 more
TL;DR: A very potent HIV-1 protease inhibitor (K(i) = 0.
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