Results 61 to 70 of about 106,461 (152)

First-Principles Study of Chemisorption of Oxygen and Aziridine on Graphitic Nanostructures [PDF]

, 2009
Using ab initio plane wave pseudopotential calculations, we study the energetics and structure of adsorbed linear arrays of oxygen and aziridine on carbon nanotubes, graphitic ribbons, and graphene sheets.
Giapis, Konstantinos P., Kutana, Alex
core   +2 more sources

Photo-driven redox-neutral decarboxylative carbon-hydrogen trifluoromethylation of (hetero)arenes with trifluoroacetic acid

Nature Communications, 2017
C–H bond functionalization has become an important tool for many organic transformations, however such reactions typically require stoichiometric amounts of external oxidants.
Jin Lin, Zhi Li, Jian Kan, Shijun Huang, Weiping Su, Yadong Li   +5 more
doaj   +1 more source

Traceless Redox-Annulations of Alicyclic Amines

SynOpen, 2020
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox­-neutral annulations with ortho-(nitromethyl)benzaldehyde. Benzoic­ acid acts as a promoter in these reactions, which involve concurrent amine α-C–H bond and N–H bond functionalization ...
Dillon R. L. Rickertsen, Longle Ma, Anirudra Paul, Khalil A. Abboud, Daniel Seidel   +4 more
doaj   +1 more source

Iridium porphyrin-catalysed asymmetric carbene insertion into primary N-adjacent C–H bonds with TON over 1000000

Nature Communications
Selective functionalization of ubiquitous C-H bonds in organic molecules provides a straightforward and efficient approach to construct complex molecules with fewer synthetic steps and high atom economy, thus promoting more sustainable and economical ...
Zong-Rui Li, Kun Zhan, Yi-Jie Wang, Liang-Liang Wu, Guo-Lin Lu, Hao-Yang Wang, Xiao-Long Wan, Zhen-Jiang Xu, Kam-Hung Low, Chi-Ming Che   +9 more
doaj   +1 more source

N,N- and N,O-Bidentate-Chelation-Assisted Alkenyl C–H Functionalization

Molecules
Chelation-assisted olefinic C–H functionalization has been demonstrated to be a powerful method of constructing multi-substituted alkenes from simpler ones.
Yawei Zhang, Chengxing Peng, Xiaoli Li, Xiuying Liu, Liyuan Ding, Guofu Zhong, Jian Zhang   +6 more
doaj   +1 more source

Activation and Oxidation of Mesitylene C−H Bonds by (Phebox)Iridium(III) Complexes [PDF]

, 2015
A pincer iridium(III) complex, (Phebox)Ir(OAc)_2OH_2 (1) (Phebox = 3,5-dimethylphenyl-2,6-bis(oxazolinyl)), selectively cleaves the benzylic C–H bond of mesitylene to form an isolable iridium mesityl complex, (Phebox)Ir(mesityl)(OAc) (3), in >90% yield ...
Emge, Thomas J., Gao, Yang, Goddard, William A., III, Goldman, Alan S., Johnson, Samantha I., Nielsen, Robert J., Zhou, Meng   +6 more
core   +5 more sources

Enantioselective functionalization of unactivated C(sp3)–H bonds through copper-catalyzed diyne cyclization by kinetic resolution

Nature Communications
Site- and stereoselective C–H functionalization is highly challenging in the synthetic chemistry community. Although the chemistry of vinyl cations has been vigorously studied in C(sp3)–H functionalization reactions, the catalytic enantioselective C(sp3)–
Yang-Bo Chen, Li-Gao Liu, Zhe-Qi Wang, Rong Chang, Xin Lu, Bo Zhou, Long-Wu Ye   +6 more
doaj   +1 more source

C–H Activation via Group 8–10 Pincer Complexes: A Mechanistic Approach

Inorganics
C–H bond activation is a crucial synthetic strategy widely utilized in both academic and industrial settings. Due to the strong and kinetically inert nature of the C–H bond, its functionalization typically requires metal-based catalysts.
Juan S. Serrano-García, Andrés Amaya-Flórez, Jordi R.-Galindo, Lucero González-Sebastián, Luis Humberto Delgado-Rangel, David Morales-Morales   +5 more
doaj   +1 more source

Geminal group-directed olefinic C-H functionalization via four- to eight-membered exo-metallocycles

Nature Communications, 2019
Identifying distinct cyclometallation pathways is essential to new types of C-H activation and functionalization in organic synthesis. Here, the authors show the activation of an olefinic C-H bond geminal to the directing group via four- to eight ...
Keke Meng, Tingyan Li, Chunbing Yu, Cong Shen, Jian Zhang, Guofu Zhong   +5 more
doaj   +1 more source

Designing all-graphene nanojunctions by covalent functionalization

, 2011
We investigated theoretically the effect of covalent edge functionalization, with organic functional groups, on the electronic properties of graphene nanostructures and nano-junctions.
Abe S., Alice Ruini, Barone V., Bekyarova E., Burghard M., Cai J., Caldas M. J., Campos L. C., Cano-Márquez A. G., Castro Neto A. H., Caterina Cocchi, Chen W., Chen Z., Datta S. S., Deborah Prezzi, Dewar M. J. S., Dávila L. Y. A., Elisa Molinari, Farmer D. B., Farmer D. B., Geim A., Han M. Y., Hantal G., Jia X., Jiao L., Kosynkin D. V., Lair S., Li X., Loh K., Lohmann T., Lopez-Bezanilla A., Lu Y. H., Marilia J. Caldas, Nakada K., Novoselov K. S., Ponomarenko L., Prezzi D., Prezzi D., Qian H., Roothaan C. C. J., Sevinçli H., Sinitskii A., Soldano C., Son Y.-W., Sun J. T., Tachikawa H., Venkataraman L., Wang X., Wang X., Wang X., Wetmore S. D., Xia F., Yang L., Yang L., Yang X., Zhang Y.-H.   +55 more
core   +1 more source