An efficient methodology for the nucleophilic fluoromethylation of alkyl and benzyl halides using alpha-fluoro-alpha-(phenylsulfonyl)methane (1) as a highly versatile reagent is reported. Using benzyl halides, stereospecific one-pot synthesis of alpha-fluorovinyl compounds such as alpha-fluorostyrylsulfones, alpha-fluorocinnamates, and alpha-fluorochalcones has been achieved. The methodology has been extended toward the synthesis of alpha-substituted fluoroalkane derivatives using selective reductive desulfonylation conditions.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1021/ol8029627 | DOI Listing |
Small
December 2024
LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr Roberto Frias, Porto, 4200-465, Portugal.
The oxidative cross-coupling of benzyl alcohol (BA) and benzylamine (BZA) is employed for the production of the corresponding imine, N-benzylidenebenzylamine (BZI), under visible light irradiation (light-emitting diodes (LE with λ = 417 nm) and mild reaction conditions. The cesium bismuth halide perovskites (CsBiBr, CBB) are synthesized by a one-step solution process as a sustainable alternative for the widely used Pb-halide perovskites. The CBB photocatalyst is immobilized on a polyethylene terephthalate (PET) structure designed explicitly for three-dimensional (3D) printing to operate in both batch and continuous modes to overcome the need for a final catalyst separation step.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
University of Ottawa, Department of Chemistry and Biomolecular Sciences, 10 Marie Curie, k1n6n5, Ottawa, CANADA.
Hydrosilanes and Lewis bases are known to promote various reductive defunctionalizations, rearrangements, and silylation reactions, facilitated by enigmatic silicon/Lewis base-derived reactive intermediates. Despite the wide variety of transformations enabled by this reagent combination, no examples of intermolecular C(sp3)-C(sp3) forming reactions have been reported. In this work, we've identified 1,1,3,3-tetramethyldisiloxane (TMDSO) and KOtBu as a unique reagent combination capable of generating benzylic nucleophiles in-situ from styrene derivatives, which can subsequently react with alkyl halides to give a new C(sp3)-C(sp3) linkage via formal hydroalkylation.
View Article and Find Full Text PDFJ Am Chem Soc
December 2024
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
Ni-catalyzed multicomponent cross-couplings have emerged as a powerful strategy for efficiently constructing complex molecular architectures from a diverse array of organic halides. Despite its potential, selectively forming multiple chemical bonds in a single operation, particularly in the realm of cross-electrophile coupling catalysis, remains a significant challenge. In this study, we have developed a consecutive open-shell reductive Ni catalysis, enabling the formation of two geminal C(sp)-C(sp) bonds from two stereoelectronically similar C(sp)-I reactants in conjunction with a methylene electrophile.
View Article and Find Full Text PDFSmall
December 2024
College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China.
X-ray imaging utilizing organic-inorganic hybrid metal halide (OIHMH) glassy scintillators has garnered significant attention. But their inferior radioluminescence makes achieving rapid image acquisition difficult, posing a persistent challenge for dynamic imaging. Herein, organic phosphonium halide side-chain engineering is proposed, introducing bulky aromatic rings at the alkyl chain ends, to improve the radioluminescence of OIHMHs.
View Article and Find Full Text PDFTop Curr Chem (Cham)
November 2024
Hangzhou Institute of Advanced Study, University of Chinese Academy of Sciences, 1 Sub-Lane Xiangshan, Hangzhou, 310024, China.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!