Results 331 to 340 of about 60,682 (387)

A metal-free route to alkynyl sulfones under photoinduced conditions with the insertion of sulfur dioxide

, 2020
A metal-free route to alkynyl sulfones under photoinduced conditions is accomplished, starting from 4-alkyl Hantzsch esters, sulfur dioxide, and alkynyl bromides under visible light irradiation at room temperature.
Xinxing Gong, Min Yang, Jinbiao Liu, F. He, Xiaona Fan, Jie Wu   +5 more
semanticscholar   +1 more source

Amphiphilic perfluoroalkylated sulfones and sulfonate betaines

Journal of Fluorine Chemistry, 2007
Abstract Two types of perfluoro alkyl-containing amphiphilic sulfones 7 – 9 and 13 – 15 , respectively, and sulfonate betaines 23 – 32 were prepared using 2-[(perfluoroalkyl)methyl]oxiranes ( 1–3 , R F  = C 4 F 9 , C 6 F 13 , C 8 F 17 ) or 3-(perfluoroalkyl)propyl iodides ( 16 and 17 , R F  = C 6 F 13 , C 8 F 17 ) as the starting compounds ...
Oldřich Paleta, Robert Kaplánek
openaire   +2 more sources

Tunable heteroaromatic sulfones enhance in-cell cysteine profiling.

Journal of the American Chemical Society, 2019
Heteroaromatic sulfones react with cysteine via nucleophilic aromatic substitution, providing a mechanistically selective and irreversible scaffold for cysteine conjugation.
Hashim F Motiwala, Yu-Hsuan Kuo, Brittany L. Stinger, B. Palfey, Brent R. Martin   +4 more
semanticscholar   +1 more source

Dioxygen mediated hydroacylation of vinyl sulfonates and sulfones on water [PDF]

Chem. Commun., 2010
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Vijay Chudasama, Jenna M. Ahern, Stephen Caddick, Richard J. Fitzmaurice   +3 more
openaire   +3 more sources

Aromatic sulfonation XI: Sulfonation of benzene and toluene with sulfur trioxide; sulfone formation and sulfonic acid isomer distribution. [PDF]

Recueil des Travaux Chimiques des Pays-Bas, 1964
AbstractThe sulfonation of benzene and toluene with sulfur trioxide without solvent has been studied extensively.With benzene at low conversion benzenesulfonic acid and diphenylsulfone are the only products. At 25° the sulfone: sulfonic acid ratio changes from 0.2 to 0.6 on varying the SO3 : C6H6 ratio from 0.13 to 1.3.
Hans Cerfontain, A. Telder, L. Vollbracht   +2 more
openaire   +1 more source

Copper-Catalyzed Enantioselective Construction of Tertiary Propargylic Sulfones.

Angewandte Chemie, 2019
Tertiary propargylic sulfones are of significant importance in organic synthesis and medicinal chemistry, but to date no general asymmetric synthesis approach has been developed.
J. Gómez, Àlex Cristòfol, Arjan W. Kleij   +2 more
semanticscholar   +1 more source

Catalyst-free visible-light-initiated oxidative coupling of aryldiazo sulfones with thiols leading to unsymmetrical sulfoxides in air

Green Chemistry, 2019
A facile visible-light-driven method has been developed to construct sulfoxides from aryldiazo sulfones and thiols in air under photocatalyst-free conditions.
Qishun Liu, Leilei Wang, H. Yue, Jiang‐Sheng Li, Zidan Luo, Wei Wei   +5 more
semanticscholar   +1 more source

Vinyl sulfones

Acta Crystallographica Section C Crystal Structure Communications, 2008
Four neutral vinyl sulfones, two of which are paired with phosphonate groups, are described. The compounds are diisopropyl (2-phenylethenylsulfonylmethyl)phosphonate, C(15)H(23)O(5)PS, (I), diisopropyl {[2-(7-methoxy-1,3-benzodioxol-5-yl)ethenylsulfonyl]methylsulfonylmethyl}phosphonate, C(18)H(27)O(10)PS(2), (II), bis(trans-2-phenylethenyl) sulfone, C ...
Jessica H, Wong, Marilyn M, Olmstead, James C, Fettinger, Jacquelyn, Gervay-Hague   +3 more
openaire   +2 more sources

Regio- and Enantioselective Preparation of Chiral Allylic Sulfones Featuring Elusive Quaternary Stereocenters.

Angewandte Chemie, 2019
We describe here the first general asymmetric synthesis of sterically encumbered alfa,alfa-disubstituted allylic sulfones via Pdcatalyzed allylic substitution.
Aijie Cai, Arjan W. Kleij
semanticscholar   +1 more source

Photocatalyst‐Free Visible Light‐Induced Synthesis of β‐Oxo Sulfones via Oxysulfonylation of Alkenes with Arylazo Sulfones and Dioxygen in Air

Advanced Synthesis and Catalysis, 2019
A catalyst-free strategy has been established for the synthesis of β-oxo sulfones via visible light-induced oxysulfonylation of alkenes with arylazo sulfones with dioxygen in air.
Qishun Liu, Fei Liu, H. Yue, Xiaohui Zhao, Jiang‐Sheng Li, Wei Wei   +5 more
semanticscholar   +1 more source