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Relevant bibliographies by topics / Metal free C-O bond formation

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Academic literature on the topic 'Metal free C-O bond formation'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Metal free C-O bond formation"

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Guo, Lirong, Fengting Liu, Liying Wang, et al. "Transition-metal-free aerobic C–O bond formation via C–N bond cleavage." Organic Chemistry Frontiers 7, no. 9 (2020): 1077–81. http://dx.doi.org/10.1039/d0qo00173b.

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We disclosed a TM-free cascade S<sub>N</sub>Ar-[3,3] rearrangement–rearomatization process for the efficient construction of NOBIN-type biaryls from readily available (hetero)arylhydroxylamines and aryltrimethylammonium salts under mild conditions.

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Szostak, Michal, and Guangchen Li. "Non-Classical Amide Bond Formation: Transamidation and Amidation of Activated Amides and Esters by Selective N–C/O–C Cleavage." Synthesis 52, no. 18 (2020): 2579–99. http://dx.doi.org/10.1055/s-0040-1707101.

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In the past several years, tremendous advances have been made in non-classical routes for amide bond formation that involve transamidation and amidation reactions of activated amides and esters. These new methods enable the formation of extremely valuable amide bonds via transition-metal-catalyzed, transition-metal-free, or metal-free pathways by exploiting chemoselective acyl C–X (X = N, O) cleavage under mild conditions. In a broadest sense, these reactions overcome the formidable challenge of activating C–N/C–O bonds of amides or esters by rationally tackling nN → π*C=O delocalization in am

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Sun, Qiu, Ling He, Jiaxin Cheng, Ze Yang, Yuansheng Li, and Yulan Xi. "Synthesis of Isoxazolines and Isoxazoles via Metal-Free Desulfitative Cyclization." Synthesis 50, no. 12 (2018): 2385–93. http://dx.doi.org/10.1055/s-0037-1609480.

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A novel, one-pot reaction for the synthesis of isoxazolines and isoxazoles is developed via a cascade process under metal-free conditions. The approach involves the formation of intramolecular C–N and C–O bonds and intermolecular C–C bonds from aromatic alkenes or alkynes and N-hydroxysulfonamides using hypervalent iodine(VII) and iodine as the oxidant. Activation of C–H and C–C bonds/construction of C–O bonds/elimination of SO2/C–N bond formation is achieved in sequence in the reaction system.

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Miyabe, Hideto. "Transition-Metal-Free Activation of Amide Bond by Arynes." Molecules 23, no. 9 (2018): 2145. http://dx.doi.org/10.3390/molecules23092145.

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Highly reactive arynes activate the N–C and C=O bonds of amide groups under transition metal-free conditions. This review highlights the insertion of arynes into the N–C and C=O bonds of the amide group. The insertion of arynes into the N–C bond gives the unstable four-membered ring intermediates, which are easily converted into ortho-disubstituted arenes. On the other hand, the selective insertion of arynes into the C=O bond is observed when the sterically less-hindered formamides are employed to give a reactive transient intermediate. Therefore, the trapping reactions of transient intermedia

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Chiummiento, Lucia, Rosarita D’Orsi, Maria Funicello, and Paolo Lupattelli. "Last Decade of Unconventional Methodologies for the Synthesis of Substituted Benzofurans." Molecules 25, no. 10 (2020): 2327. http://dx.doi.org/10.3390/molecules25102327.

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This review describes the progress of the last decade on the synthesis of substituted benzofurans, which are useful scaffolds for the synthesis of numerous natural products and pharmaceuticals. In particular, new intramolecular and intermolecular C–C and/or C–O bond-forming processes, with transition-metal catalysis or metal-free are summarized. (1) Introduction. (2) Ring generation via intramolecular cyclization. (2.1) C7a–O bond formation: (route a). (2.2) O–C2 bond formation: (route b). (2.3) C2–C3 bond formation: (route c). (2.4) C3–C3a bond formation: (route d). (3) Ring generation via in

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Kim, Han Byeol, Dong Kyun Han, Jae Kyun Lee, and Seo-Jung Han. "Electrochemical dearomatization of 2-naphthols for C–O bond formation." RSC Advances 15, no. 21 (2025): 16276–80. https://doi.org/10.1039/d5ra02693h.

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Li, Shengwang, Guiqin Liu, Zheyan Zhang, et al. "Metal free C–O bond cleavage: a new strategy for the synthesis of substituted oxazoles." RSC Advances 14, no. 38 (2024): 28210–14. http://dx.doi.org/10.1039/d4ra05122j.

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A strategy for C–O bond cleavage of ester for the synthesis of substituted oxazoles was developed. The synthesis proceeded smoothly under metal-free conditions, combining C–O bond cleavage, C–N and C–O bond formation in one pot.

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Luo, Shuang, Ziwei Hu, and Qiang Zhu. "Dearomative C–C and C–N bond cleavage of 2-arylindoles: transition-metal-free access to 2-aminoarylphenones." Organic Chemistry Frontiers 3, no. 3 (2016): 364–67. http://dx.doi.org/10.1039/c5qo00394f.

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A transition-metal-free conversion of 2-arylindoles to 2-aminoarylphenones, using environmentally benign O<sub>2</sub> as the sole oxidant, has been developed. This novel oxidative dearomatization process involves cleavage of two C–C and one C–N bonds followed by new C–C and C–O bond formation.

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Shi, Yijun, Xuejing Liu, Han Cao, et al. "Conversion of esters to thioesters under mild conditions." Organic & Biomolecular Chemistry 19, no. 13 (2021): 2991–96. http://dx.doi.org/10.1039/d1ob00187f.

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Narayan, Rishikesh, Kiran Matcha, and Andrey P. Antonchick. "Metal-Free Oxidative CC Bond Formation through CH Bond Functionalization." Chemistry - A European Journal 21, no. 42 (2015): 14678–93. http://dx.doi.org/10.1002/chem.201502005.

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Dissertations / Theses on the topic "Metal free C-O bond formation"

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Zoric, Marija. "Metal-free Motifs for Oxygen Evolution Catalysis." Bowling Green State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1499074276204656.

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Vuong, Khuong Quoc Chemistry Faculty of Science UNSW. "Metal complex catalysed C-X (X = S, O and N) bond formation." Awarded by:University of New South Wales. Chemistry, 2006. http://handle.unsw.edu.au/1959.4/23015.

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This thesis describes the catalysed addition of X-H bonds (X = S, O and N) to alkynes using a range of novel rhodium(I) and iridium(I) complexes containing hybrid bidentate phosphine-pyrazolyl, phosphine-imidazolyl and phosphine-N heterocyclic carbene (NHC) donor ligands. The synthesis of novel bidentate phosphine-pyrazolyl, phosphine-imidazolyl (P-N) and phosphine-NHC (PC) donor ligands and their cationic and neutral rhodium(I) and iridium(I) complexes [M(P N)(COD)]BPh4, [M(PC)(COD)]BPh4, [Ir(P-N)(CO)2]BPh4 and [M(P-N)(CO)Cl] were successfully performed. An unusual five coordinate iridium com

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Pandya, V. "Transition-metal-free access to biologically important scaffolds via novel C–C and C–X bond formations using aryne chemistry." Thesis(Ph.D.), National Chemical Laboratory, Pune, 2019. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5841.

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The present thesis demonstrates the importance of aryne in the construction of C–C, C–S, and C–N bonds, which result in the synthesis of the biologically important scaffolds. Chapter 1 presents the introduction of aryne and its mode of reactivity especially leading to the difunctionalization of arenes. It comprises insertion, pericyclic, annulation and multicomponent reactions of aryne and their representative examples. Chapter 2 deals with difunctionalization of aryne to form sulfones and xanthones, which is further divided into two sections. Section 1 presents the transition-metal-free

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Wu, Hao. "Catalytic Enantioselective Formations of C–B, C–C and C–Si Bonds by Organic Molecules or Transition-Metal Complexes." Thesis, Boston College, 2015. http://hdl.handle.net/2345/bc-ir:104759.

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Thesis advisor: Amir H. Hoveyda<br>Catalytic enantioselective reactions are of great importance in synthetic organic chemistry. Thus, development of efficient, selective and easily accessible catalyst for various bond formations is the main task in our laboratories. First, we have developed the first broadly applicable enantioselective boryl conjugate addition reactions to a variety of α,β-unsaturated carbonyls, promoted by a chiral Lewis basic N-heterocyclic carbene. The valuable β-boryl carbonyls were further used in complex molecule syntheses. The mechanism of these C–B bond formations was

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Ghotekar, G. S. "Asymmetric synthesis of biologically important compounds and development of synthetically useful C-C and C-O bond forming reactions via transition metal free conditions." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2019. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5855.

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Lishchynskyi, Anton. "Development of new methods for the asymmetric formation of C-N bonds." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAF026.

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Au cours de ce travail de nouvelles méthodes pour la formation de liaison C-N ont été développées. Dans la première partie de cette thèse une application de catalyse métal-ligand bifonctionnelle pour la réaction énantiosélective aza-Michael est démontrée. Dans la deuxième partie nous présentons le travail sur les cyclisations, en utilisant des alcaloïdes du quinquina facilement disponibles, comme catalyseurs des plus prometteurs, fournissant des β-amino-acides d’indoline avec jusqu'à 98% ee. Parmi eux, l’hydroquinidine ressort du lot comme étant le catalyseur donnant le meilleur excès énatiomé

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Music, Arif [Verfasser], and Dorian [Akademischer Betreuer] Didier. "The versatility of tetracoordinated boron-centered salts for transition-metal free c-c bond formations in organometallic- and electro-chemistry / Arif Music ; Betreuer: Dorian Didier." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1215499884/34.

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Liao, Yen-Sen, and 廖彥森. "(1)One-pot Synthesis of Thioesters with Bunte Salts as a Sulfur Surrogate under Transition Metal-Free Conditions(2)Hexamethyldisilazane Promoted C-N Bond Formation via Thioesters: Synthesis of Benzamides and Dimethylformamidines." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/2am6n9.

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碩士<br>國立中興大學<br>化學系所<br>106<br>In the first part of this thesis, we reported a convenient method of one-pot synthesis of thioesters by using odorless sodium thiosulfate, various anhydrides and organic halides. Compared with traditional method, this method did not use thiols, which possessed malodorous flavors and easily oxidized to form the disulfide bond. This synthetic method was firstly using organic anhydrides and sodium thiosulfate to form the Bunte salts, followed by reacting with organic halides to generate thioesters. Furthermore, two important organic compounds could be successfully s

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Hsieh, Tom Han-Hsiao. "Transition Metal Catalysis: Construction of C–N and C–C bonds en route to Nitrogen Heterocycles, Chiral Esters and 6-deoxyerythronolide B." Thesis, 2011. http://hdl.handle.net/1807/31784.

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The Dong research group is interested in harnessing the power of transition metal catalysis to transform simple molecules and reagents (such as carbon monoxide, hydrogen gas, olefins, and C–H and C–O bonds) into valuable products (such as functionalized heterocycles, chiral carbonyl compounds and natural products). This thesis will describe our continual effort to achieve this goal. Part I describes the Pd-catalyzed functionalization of sp2 and sp3 C–H bonds. Carbon monoxide is used as a stoichiometric reductant in the cyclization of diarylnitroalkenes to afford biologically relevant 3-aryl

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Book chapters on the topic "Metal free C-O bond formation"

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Yeung, Charles S., Peter K. Dornan, and Vy M. Dong. "Transition Metal Catalyzed Approaches to Lactones Involving CO Bond Formation." In Catalyzed Carbon-Heteroatom Bond Formation. Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527633388.ch2.

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Wang, Z., and A. L. Satz. "2.3 Metal-Free DEL-Compatible C—C Bond Forming Reactions." In DNA-Encoded Libraries. Georg Thieme Verlag KG, 2024. http://dx.doi.org/10.1055/sos-sd-241-00046.

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AbstractCarbon–carbon bonds play a key role in the skeletal diversity of drug-like molecules, and so it follows that DNA-compatible C—C bond formation is of high interest to the DNA-encoded chemical library (DEL) community. The development of metal-free reactions is of importance due to the tendency of DNA to sequester metal ions; sequestration can limit the effectiveness of the metals to catalyze the desired reactions. Furthermore, the metals can remain sequestered by the DNA over multiple steps, possibly resulting in downstream DNA damage. In this chapter, we review nearly two decades of met

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Mase, N. "Metal-Free Catalytic Addition in C—O Bond Formation." In Water in Organic Synthesis. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-206-00159.

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Khandelia, T., S. Ghosh, and B. K. Patel. "8 Cross-Dehydrogenative Coupling Involving Aldehydes for C(sp2)—C(sp2) Bond Formation." In Cross-Dehydrogenative Coupling. Georg Thieme Verlag KG, 2023. http://dx.doi.org/10.1055/sos-sd-240-00126.

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AbstractAldehydes have been widely utilized as an acyl source for the construction of C(sp2)—C(sp2) bonds via cross-dehydrogenative coupling (CDC) in an efficient and sustainable strategy. The aldehyde-based acylation is an important methodology for the synthesis of diaryl ketones, a significant motif in the field of agrochemicals, pharmaceuticals, and dyes. The process of C(sp2)—C(sp2) bond construction is accomplished under metal-free, transition-metal-mediated, or photochemical conditions. During the process, the oxidant alone, or in combination with transition metals, plays a crucial role.

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Mase, N. "Metal-Free Catalytic Addition in C—N Bond Formation." In Water in Organic Synthesis. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-206-00157.

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Bietti, M., and F. Dénès. "1.12 Intermolecular Radical C—H Functionalization." In Free Radicals: Fundamentals and Applications in Organic Synthesis 1. Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/sos-sd-234-00262.

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AbstractThe generation of carbon-centered radicals via intermolecular hydrogen-atom transfer (HAT) from C—H bonds to an abstracting species (HAT reagent) represents a significant challenge in terms of reactivity, site-selectivity and stereoselectivity. The radical species resulting from such a transfer can then engage in carbon—carbon or carbon—heteroatom bond formation, possibly through the intervention of transition-metal catalysts, leading to a variety of functionalized products. This chapter aims to provide the reader with useful guidelines to understand, predict, and design selective radi

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Lu, X. L., B. Wang, and S. Chiba. "1.8 Nitrogen-Centered Radicals." In Free Radicals: Fundamentals and Applications in Organic Synthesis 1. Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/sos-sd-234-00146.

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AbstractNitrogen-containing compounds are prevalent in the key components of various functional materials and compounds such as pharmaceutical drugs. Therefore, it is extremely important to develop versatile synthetic methodologies capable of constructing C—N bonds in an efficient manner under milder reaction conditions. Apart from common ionic C—N bond-forming reactions (i.e., nucleophilic and electrophilic amination, as well as transition-metal-catalyzed C—N cross-coupling processes), leveraging of nitrogen-centered radicals for C—N bond-forming process has created another dimension to the m

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Ghosh, Sumit, and Alakananda Hajra. "2 Visible-light-mediated metal-free C–Si bond formation reactions." In Carbon-Carbon and Carbon-Heteroatom. De Gruyter, 2022. http://dx.doi.org/10.1515/9783110759549-002.

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Rajendran, Ariharasudhan, Deepthy Devassy, and Ramaraj Ayyappan. "Recent progress in dinitrogen functionalization: stoichiometric and catalytic reactions." In Organometallic Chemistry. Royal Society of Chemistry, 2024. https://doi.org/10.1039/9781837676200-00150.

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An overview of dinitrogen activation and functionalization is presented with particular focus on bond formation between nitrogen and other elements, N–X (X = H, C, B). Progress in recent years is emphasized. This chapter is divided into four different sections. (a) N–H bond formation: of late, there have been a lot of developments employing Mo-pincer homogeneous catalysts in NH3 synthesis, including systems where H2O and ethylene glycol are used as proton sources. (b) Several new reactions in N–C bond formation have emerged mainly derived from dinitrogen activation involving bimetallic systems

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"Synthetic Methods for Primary Anilines." In Methods and Strategies for C–N Bond Formation Reactions. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837672615-00145.

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Aryl amines have received significant interest because these compounds widely exist in the structural backbones of ligands, pharmaceuticals, agrochemicals, natural products, and functional materials. In N-arylation reactions, several types of organic electrophile coupling partners such as (pseudo)halides (Ullmann-type and Buchwald–Hartwig couplings) and boronic acids (Chan–Lam coupling) are popular. The main synthetic methods for the preparation of these compounds involving N-arylation utilize aryl halides. Progress has been made with the coupling of arylating reagents which are less expensive

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Conference papers on the topic "Metal free C-O bond formation"

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Ajdelsztajn, Leonardo, Feng Tang, Julie M. Schoenung, Josep Picas, Geoge E. Kim, and Virgil Provenzano. "Synthesis and Oxidation Behavior of Nanocrystalline MCrAlY Bond Coats." In ITSC2003, edited by Basil R. Marple and Christian Moreau. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.itsc2003p1517.

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Abstract Thermal barrier coating (TBC) systems protect turbine blades against high-temperature corrosion and oxidation. They consist of a metal bond coat (MCrAlY, M = Ni, Co) and a ceramic top layer (ZrO2/Y2O3). In this work the oxidation behavior of conventional and nanostructured HVOF NiCrAlY coatings has been compared. Commercially available NiCrAlY powder was mechanically cryomilled and HVOF sprayed on a nickel alloy foil to form a nanocrystalline coating. Free-standing bodies of conventional and nanostructured HVOF NiCrAlY coatings were oxidized at a 1000°C for different time periods in o

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Mahabunphachai, Sasawat, Muammer Koc¸, and Jun Ni. "Characterization of Pressure Welding Process of Thin Sheet Metals in Cold and Warm Temperature Conditions." In ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31029.

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The effects of material and process conditions in the pressure welding process of thin sheet metals on the minimum welding pressure and the final bond strength are investigated in this work. The studied parameters include the material type (copper, aluminum, nickel, and stainless steel), initial blank thickness (0.051–0.254 mm), welding pressure, welding temperature (25–300°C), surface condition (wet, dry, and brushed), and indenter size. Two sets of pressure welding apparatus were developed for testing of different materials and process conditions. Based on the experimental results, copper, a

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Wang, Xueqiang, Joan G. Donaire, and Ruben Martin. "Metal-Free sp2 and sp3 C-H Functionalization/C-O Bond Forming Reaction." In 15th Brazilian Meeting on Organic Synthesis. Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_2013815132216.

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Thongmee, Dr Sirikanjana. "Enhancement of Photocatalytic by Metal Oxide Decorated Graphene Oxide Nanocomposites." In 7th World Conference on Advanced Materials, Nanoscience and Nanotechnology and 7th World Conference on Chemistry and Chemical Engineering. Eurasia Conferences, 2024. https://doi.org/10.62422/978-81-981590-9-0-005.

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The hydrothermal process was used to prepare Mn3O4/x%GO nanocomposites (NC’s) having different ratios of the Mn3O4 nanoparticles (NP’s) on the surface of graphene oxide (GO) sheet. SEM image showed that the Mn3O4 NP’s were distributed over the surface of GO sheet. HRTEM images exhibited the lattice fringe arising from the (101) plane of the Mn3O4 NP’s having the interplanar d-spacing of 0.49 nm decorating on the surface of GO. The electronic absorption spectra of Mn3O4/ x%GO NC’s also show broad bands from 250 to 550 nm. These bands arise from the d–d crystal field transitions of the tetrahedr

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Makarenko, Olena, Iryna Podchernyaeva, and Olha Hetman. "Application of Samsonov’s configuration model in establishing the influence of the electronic structure of d-metals on thermal electron emission of WBa cathodes." In IXth INTERNATIONAL SAMSONOV CONFERENCE “MATERIALS SCIENCE OF REFRACTORY COMPOUNDS”. Frantsevich Ukrainian Materials Research Society, 2024. http://dx.doi.org/10.62564/m4-om7404.

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Electron emission from WBa-cathodes is carried out from an adsorbed layer of barium and oxygen atoms on W or other d-metal adsorbents. When films of the d-metals Re, Os, Ir and Ru are deposited on the emitting surface, the work function φ decreases by 0.2 eV; and in the case of Pt, Pd and Au, it increases by 0.2 eV. The aim of the work is determine the effect of the electronic structure of d-metals on the work function of the WBa cathode using the Samsonov configuration model. According to Samsonov’s configuration model, the formation of a condensed state is accompanied by the division of vale

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