Organocatalytic C–H activation reactions

Pan, Subhas Chandra

doi:10.3762/bjoc.8.159

Cited by 137 publications

(21 citation statements)

References 35 publications

(48 reference statements)

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“…All these industrial products were categorized based on their function and chemical structure, e.g., synthetic fiber, rubber, plastics, explosives. The intermediates of these categorized products during production were retrieved from Pan55 and the Global Chemical Network54. The industrial Nr species were then further categorized into seven groups based on their N functional group, e.g., nitriles, nitro, azo (Table 2).…”

Section: Methodsmentioning

confidence: 99%

The role of industrial nitrogen in the global nitrogen biogeochemical cycle

Chang

Min

et al. 2013

Sci Rep

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Haber-Bosch nitrogen (N) has been increasingly used in industrial products, e.g., nylon, besides fertilizer. Massive numbers of species of industrial reactive N (Nr) have emerged and produced definite consequences but receive little notice. Based on a comprehensive inventory, we show that (1) the industrial N flux has increased globally from 2.5 to 25.4 Tg N yr−1 from 1960 through 2008, comparable to the NOx emissions from fossil fuel combustion; (2) more than 25% of industrial products (primarily structural forms, e.g., nylon) tend to accumulate in human settlements due to their long service lives; (3) emerging Nr species define new N-assimilation and decomposition pathways and change the way that Nr is released to the environment; and (4) the loss of these Nr species to the environment has significant negative human and ecosystem impacts. Incorporating industrial Nr into urban environmental and biogeochemical models could help to advance urban ecology and environmental sciences.

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Section: Methodsmentioning

confidence: 99%

The role of industrial nitrogen in the global nitrogen biogeochemical cycle

Chang

Min

et al. 2013

Sci Rep

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“…The synthesis of tricyclic tetrahydroquinazoline derivatives from 2-aminobenzaldehyde and its substituted analogs was reported [56,109] Tricyclic 1,2-dihydroquinazoline bases and their derivatives were synthesized without using catalysts using this method. Reactions of this type, i.e., functionalization of a C-H bond, are often used to synthesize various heterocyclic compounds [110][111][112][113]. The mechanism of formation of tricyclic quinazolines was studied using deuterium exchange [114].…”

Section: Synthesis Of Tricyclic Quinazoline Alkaloid Derivativesmentioning

confidence: 99%

Tricyclic Quinazoline Alkaloids: Isolation, Synthesis, Chemical Modification, and Biological Activity

Shakhidoyatov

Элмурадов

2014

Chem Nat Compd

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“…There are two reasons. Firstly, most polymeric materials have abundant C−H bonds on their outermost surface to provide high‐density reaction sites and final high‐density group array . Secondly, the development of chemoselective C−H chemistry can avoid the use of C−C backbone which may result in undesired surface degradation .…”

Section: Introductionmentioning

confidence: 99%

“…Firstly, most polymeric materials have abundant C À H bonds on their outermost surface to provide high-density reaction sites and final high-density group array. [47] Secondly, the development of chemoselective C À H chemistry can avoid the use of C À C backbone which may result in undesired surface degradation. [48,49] So far, a number of effective technologies have been developed for C À H transformations during the past decades, including organometallic [50] and enzymes catalysis, [51] γ-ray initiated, [52] and UV-induced [53] reactions.…”

Section: Introductionmentioning

confidence: 99%

Surface Engineering of Organic Polymers by Photo‐induced Free Radical Coupling with p‐Dimethylaminophenyl Group as A Synthesis Block

et al. 2020

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This contribution presents a versatile strategy to transfer unactivated surface C–H bonds of polymeric substrates to C–R–F groups (R stands for a spacer and F stands for functional group) by UV light‐assisted surface free radical coupling. With p‐dimethylaminophenyl radical as a building block, various reactive groups, such as –CHO, –SH, –B(O)OH, –CN and –SO3−, are successfully grafted onto typical commercial polymer substrates including biaxially oriented polypropylene, polyethylene phthalate, ethylene tetrafluoroethylene copolymer and dimethyl silicone rubber. Fluorencence microscope images, X‐ray photoelectron spectroscopy, UV‐vis and fluorescence spectra support that the above functional groups are covalently bonded to the polymer substrates. The concentration of the reactive groups immobilized on the different substrates is in the order of 10−8 to 10−7 mmol mm−2 determined by UV‐vis spectrometry. In addition, as a proof‐of‐concept, the introduced functional groups are demonstrated by their special reactions, for example, –CHO reacting with –NH2 to synthesize Schiff base, –SH to detect silver ions, and the complexes of –C=N and Zn2+ to degrade Rhodamine B. The results indicate that one can fabricate an integrated molecular library on the surface of polymeric substrates at the molecular level by selecting the building blocks.

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Organocatalytic C–H activation reactions

Abstract: SummaryOrganocatalytic C–H activation reactions have recently been developed besides the traditional metal-catalysed C–H activation reactions. The recent non-asymmetric and asymmetric C–H activation reactions mediated by organocatalysts are discussed in this review.

Cited by 137 publications

References 35 publications

The role of industrial nitrogen in the global nitrogen biogeochemical cycle

The role of industrial nitrogen in the global nitrogen biogeochemical cycle

Tricyclic Quinazoline Alkaloids: Isolation, Synthesis, Chemical Modification, and Biological Activity

Surface Engineering of Organic Polymers by Photo‐induced Free Radical Coupling with p‐Dimethylaminophenyl Group as A Synthesis Block

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