Journal ArticleDOI
New method for C–H arylation/alkylation at α-position of cyclic aliphatic ethers by iron-oxide mediated reaction
Parvinder Pal Singh,Satish Gudup,Hariprasad Aruri,Umed Singh,Srinivas Ambala,Mahipal Yadav,Sanghapal D. Sawant,Ram A. Vishwakarma +7 more
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TLDR
A new and efficient iron oxide catalyzed cross-coupling reaction between organometallic species such as alkyl/arylmagnesium halides or organolithium species and α-hydrogen bearing cyclic unbranched and branched aliphatic ethers via activation of C(sp(3))-H.Abstract:
We report a new and efficient iron oxide catalyzed cross-coupling reaction between organometallic species such as alkyl/arylmagnesium halides or organolithium species and α-hydrogen bearing cyclic unbranched and branched aliphatic ethers via activation of C(sp3)–H. In the presence of 1 mol% of iron oxide, five and six membered unbranched cyclic ethers such as tetrahydrofuran and tetrahydropyran gave good to excellent yields of cross-coupled products. Whereas, in case of branched ether such as 2-methyltetrahydrofuran, it was observed that the arylation occurred at both the sides and gave moderate yields of a mixture of regioisomers. Among the organometallic species used, alkyl organometallic reagents gave less yields as compared to aryl organometallics.read more
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Journal ArticleDOI
Iron-Catalyzed C-H Bond Activation.
TL;DR: This review includes reactions that take place via reactive organoiron intermediates, and it covers the reactions of simple substrates and substrates possessing a directing group that anchors the catalyst to the substrate, providing an overview of iron-mediated and iron-catalyzed C-H activation reported in the literature by October 2016.
Journal ArticleDOI
Direct functionalization of tetrahydrofuran and 1,4-dioxane: nickel-catalyzed oxidative C(sp3)-H arylation.
TL;DR: This paper aims to demonstrate the efforts towards in-situ applicability of EMMARM, as to provide real-time information about concrete mechanical properties such as E-modulus and compressive strength.
Journal ArticleDOI
Copper-catalysed oxidative C–H/C–H coupling between olefins and simple ethers
TL;DR: The first copper-catalysed oxidative alkenylation of simple ethers to construct allylic ethers was successfully achieved and it is likely that this reaction is likely to proceed via a radical process.
References
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Journal ArticleDOI
Palladium(II)-catalyzed C-H activation/C-C cross-coupling reactions: versatility and practicality.
TL;DR: A review of palladium-catalyzed coupling of CH bonds with organometallic reagents through a PdII/Pd0 catalytic cycle can be found in this paper.
Journal ArticleDOI
Rhodium-Catalyzed C-C Bond Formation via Heteroatom-Directed C-H Bond Activation
TL;DR: This review focuses on Rh-catalyzed methods for C-H bond functionalization, which have seen widespread success over the course of the last decade and are discussed in detail in the accompanying articles in this special issue of Chemical Reviews.
Journal ArticleDOI
Aryl-aryl bond formation by transition-metal-catalyzed direct arylation.
TL;DR: A number of improvements have developed the former process into an industrially very useful and attractive method for the construction of aryl -aryl bonds, but the need still exists for more efficient routes whereby the same outcome is accomplished, but with reduced waste and in fewer steps.
Journal ArticleDOI
Activation of c-h bonds by metal complexes
A. E. Shilov,Georgiy B. Shul'pin +1 more
TL;DR: In this article, it was shown that the same alkylhydridoplatinum(IV) complex is the intermediate in the reaction of ethane with platinum(II) σ-complexes.
Journal ArticleDOI
Transition-metal-catalyzed direct arylation of (hetero)arenes by C-H bond cleavage.
TL;DR: P palladium and ruthenium catalysts have been described that enable the direct arylation of (hetero)arenes with challenging coupling partners--including electrophilic aryl chlorides and tosylates as well as simple arenes in cross-dehydrogenative arylations.