Chemoselective Palladium‐Catalyzed Direct C–H Arylation of 5‐Carboxyimidazoles: Unparalleled Access to Fused Imidazole‐Based Tricycles Containing Six‐, Seven‐ or Eight‐Membered Rings
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201700297
Abstract: An extensive study of the chemoselective Pd-catalyzed inter- and intramolecular direct C–H arylation of N-benzylated 5-carboxyimidazoles with halides with and without CuI assistance in 1,4-dioxane as a low-polarity solvent was explored. The method was suitable… read more here.
Keywords: direct arylation; membered rings; fused imidazole; eight membered ... See more keywords
Influence of heteroelement on dipole and quadrupole moments of a series of three-membered rings containing a second, third, fourth, or fifth-row atom: a theoretical investigation
Sign Up to like & getrecommendations! Published in 2018 at "Structural Chemistry"
DOI: 10.1007/s11224-018-1190-5
Abstract: The influence of heteroelements on the molecular dipole and traceless quadrupole moments of a series of twenty-two three-membered rings (1–22) was theoretically estimated employing levels of theory such as MP2, CCSD, and PBE1PBE in combination… read more here.
Keywords: membered rings; rings containing; quadrupole moments; moments series ... See more keywords
Carbon nitride of five-membered rings with low optical bandgap for photoelectrochemical biosensing
Sign Up to like & getrecommendations! Published in 2021 at "Chem"
DOI: 10.1016/j.chempr.2021.06.010
Abstract: Summary As an analog of graphene, carbon nitrides have drawn increasing attention, ranging from artificial photosynthesis to synthetic organic chemistry. Notably, the most studied polymeric, C3N4, and other stoichiometric ones, such as C3N5, C4N3, and… read more here.
Keywords: photoelectrochemical biosensing; five membered; membered rings; carbon ... See more keywords
Stability, electronic and mechanical properties of superhard materials formed by 4+6+8 membered rings of carbon
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Solid State Chemistry"
DOI: 10.1016/j.jssc.2019.06.043
Abstract: Abstract In order to study the relationship between structures and properties, a series of 4 + 6+8 carbon allotropes including oC24, oC32, oC40 and oC48 are designed by inserting eight-atom fragments between the four- and eight-membered rings… read more here.
Keywords: oc40 oc48; rings carbon; membered rings; stability electronic ... See more keywords
Effects of Aromaticity and Connectivity on the Conductance of Five-Membered Rings
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.7b00283
Abstract: Even though five-membered rings, for example, thiophene, are ubiquitous in organic and molecular electronics, as a class of molecules, they resist a simple interpretation. Generally containing four sp2-hybridized carbon atoms, the fifth position can be… read more here.
Keywords: membered rings; connectivity conductance; aromaticity connectivity; connectivity ... See more keywords
Visible-Light-Induced Dehydrohalogenative Coupling for Intramolecular α-Alkenylation: A Way to Build Seven- and Eight-Membered Rings.
Sign Up to like & getrecommendations! Published in 2020 at "Organic letters"
DOI: 10.1021/acs.orglett.0c01391
Abstract: A visible-light-induced intramolecular α-alkenylation has been developed via metal-free dehydrohalogenative C(sp2)-C(sp2) coupling reaction to afford seven- and eight-membered rings. Extensive mechanistic studies prove that this reaction proceeds through a [2 + 2]-photocycloaddition, elimination, and retro-[2… read more here.
Keywords: membered rings; seven eight; light induced; intramolecular alkenylation ... See more keywords
Palladium-Catalyzed Synthesis of Functionalized Indoles by Acylation/Allylation of 2-Alkynylanilines with Three-Membered Rings.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c00246
Abstract: Palladium-catalyzed synthesis of 3-acyl and -allyl indoles has been realized by merging nucleophilic cyclization of ortho-alkynylanilines with ring opening of three-membered rings such as cyclopropenones and gem-difluorinated cyclopropanes. These functionalized indoles were obtained in moderate… read more here.
Keywords: functionalized indoles; palladium catalyzed; three membered; membered rings ... See more keywords
Hydride Transfer-Initiated Cross-Dehydrogenative Coupling Reaction to Access Nine-Membered Rings.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.3c00193
Abstract: An unprecedented hydride transfer-triggered cross-dehydrogenative coupling of two C(sp3)-H bonds to target nine-membered rings has been developed. Salient features of this methodology include atom and step economy and metal-free and redox-neutral conditions, with water as… read more here.
Keywords: nine membered; membered rings; hydride transfer; dehydrogenative coupling ... See more keywords
Access to Optically Active 7-Membered Rings by a 2-Step Synthetic Sequence: Cu-Catalyzed Stereoselective Cyclopropanation of Branched 1,3-Dienes/Rh-Catalyzed Stereoconvergent [5 + 2] Cycloaddition
Sign Up to like & getrecommendations! Published in 2020 at "ACS Catalysis"
DOI: 10.1021/acscatal.0c02956
Abstract: We report a 2-step cyclopropanation/cycloaddition catalytic sequence that provides access to optically active 7-membered rings with a carboxyl-bearing tertiary stereocenter. In the first step, the ... read more here.
Keywords: optically active; membered rings; cyclopropanation; cycloaddition ... See more keywords
On-Surface Synthesis of a Carbon Nanoribbon Composed of 4-5-6-8-Membered Rings.
Sign Up to like & getrecommendations! Published in 2023 at "ACS nano"
DOI: 10.1021/acsnano.3c01915
Abstract: From the structure point of view, there are a number of ways of tiling a carbon sheet with different polygons, resulting in prospects of tailoring electronic structures of low-dimensional carbon nanomaterials. However, up to now,… read more here.
Keywords: nanoribbon composed; surface synthesis; carbon; membered rings ... See more keywords
Thermal Behavior, Crystal Structure, and Solid-State Transformation of Orthorhombic Mo–V Oxide under Nitrogen Flow or in Air
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DOI: 10.1021/acsomega.9b01212
Abstract: Orthorhombic Mo–V oxide is one of the most active solid-state catalysts for selective oxidation of alkane, and revealing its detailed structure is important for understanding reaction mechanisms and for the design of better catalysts. We… read more here.
Keywords: state transformation; structure; membered rings; solid state ... See more keywords