Results 81 to 90 of about 1,584,934 (220)
Beilstein Journal of Organic Chemistry, 2015 The 1,3-dipolar cycloaddition of acyclic 2-diazo-1,3-dicarbonyl compounds (DDC) and thioketones preferably occurs with Z,E-conformers and leads to the formation of transient thiocarbonyl ylides in two stages.
Andrey S. Mereshchenko +5 more
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Diarylmethyl Ethers for the Protection of Polyols
Journal of Chemistry, 2013 The paper discusses the use of diarylmethyl ethers for the protection of hydroxyl groups, in particular, carbohydrate hydroxyl groups. The formation of these ethers can be done nonselectively by the thermal reactions of diryldiazomethanes via a carbene ...
Sigthor Petursson
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Journal of Heterocyclic Chemistry, EarlyView.A robust method for synthesizing substituted oxadiazepines and related heterocycles via intramolecular SNAr is detailed. Under mild conditions, this methodology has been leveraged to afford products of varying electronic and aryl nature in up to 99% yields.
Matthew W. Reeves +4 more
wiley +1 more source
Catalytic asymmetric constructions of nitrogen, boron and carbon continuous stereogenic centers
Nature CommunicationsPrecise construction of molecular chirality is a longstanding scientific challenge in synthetic chemistry. Although methods to enantioselectively assemble consecutive carbon stereocenters are abundant, courses to establish enriched continuous ...
Guan Zhang +6 more
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Cyclopropanation using flow-generated diazo compounds. [PDF]
, 2015 We have devised a room temperature process for the cyclopropanation of electron-poor olefins using unstabilised diazo compounds, generated under continuous flow conditions.
core +2 more sources
Main‐chain polyfullerenes: Taking fullerene to the next dimension
Polymer International, EarlyView.This short review appraises main‐chain polyfullerenes. Their slow development over 30 years has suddenly boomed with a rapid growth due to exciting developments in solar energy. Abstract This mini‐review gives an overview of the development, chemistry, properties and applications of main‐chain polyfullerenes.
Marco Antônio GB Gomes +4 more
wiley +1 more source
Transformative Chemistry, EarlyView.A photoinduced, NHC‐borane‐enabled radical deoxygenative hydrogenation featuring mild reaction conditions and excellent functional group tolerance has been developed. The reaction proceeds through a novel EDA complex photoactivation pathway. To explore the potential of NHC‐boranes in deuteration reactions, we developed a novel photoinduced protocol for
Mengqing Zhang +2 more
wiley +1 more source
ChemistryEuropeAn in‐depth mechanistic study for the photogeneration of free diazoalkanes from N‐tosylhydrazone precursors by combining observations from synthesis with spectroscopic and theoretical methods is presented.
Ferdinand L. Pointner +12 more
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Recent advances in asymmetric [2+1] cycloaddition with α-cyano diazo compounds
Tetrahedron ChemThe asymmetric [2 + 1] cycloaddition of α-cyano diazo compounds has emerged as an efficient and versatile strategy for synthesizing cyano-substituted cyclopropanes, which are valuable scaffolds in medicinal chemistry, materials science, and natural ...
Shuicai Chen +5 more
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Advances in Unconventional and Sustainable Synthetic Approaches to Benzopyran Scaffolds
The Chemical Record, EarlyView.This review provides a comprehensive and critical analysis of low‐impact synthetic methodologies reported in the last 8 years (2018–2026) for the construction of benzopyran‐derived scaffolds, such as coumarins, flavones, chromones, chromenes, and chromanes. The benzopyran scaffold is a versatile family of heterocycles found in a wide range of bioactive
Nathalia B. Sá +4 more
wiley +1 more source