86211-05-4Relevant academic research and scientific papers
Beta-lactones as antibacterial agents
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Page/Page column 37-38, (2017/01/05)
The present invention relates to specific beta-lactone compounds and compositions thereof for the treatment of infections, such as, e.g., infections with bacteria or infections with protozoa, in particular infections with Gram-positive and/or Gram-negativ
Palladium-catalyzed thiocarbonylation of aryl, vinyl, and benzyl bromides
Burhardt, Mia N.,Ahlburg, Andreas,Skrydstrup, Troels
, p. 11830 - 11840 (2015/02/05)
(Chemical Equation Presented) A catalytic protocol for synthesis of thioesters from aryl, vinyl, and benzyl bromides as well as benzyl chlorides was developed using only stoichiometric amounts of carbon monoxide, produced from a solid CO precursor inside a two-chamber system. As a catalytic system, the combination of bis(benzonitrile) palladium(II) chloride and Xantphos furnished the highest yields of the desired compounds, along with the weak base, NaOAc, in anisole at 120°C. The choice of catalytic system as well as solvent turned out to be important in order to ensure a high chemoselectivity in the reaction. Both electron-rich and electron-deficient aryl bromides worked well in this reaction. Addition of 1 equiv of sodium iodide to the reaction improved the chemoselectivity with the electron-deficient aryl bromides. The thiol scope included both aryl and alkyl thiols, including 2-mercaptobenzophenones, whereby a thiocarbonylation followed by a subsequent McMurry coupling yielded differently substituted benzothiophenes. It was demonstrated that the methodology could be applied for 13C introduction into the thiophene ring.
Neutral sulfur nucleophiles: Synthesis of thioethers and thioesters by substitution reactions of N-heterocyclic carbene boryl sulfides and thioamides
Pan, Xiangcheng,Curran, Dennis P.
supporting information, p. 2728 - 2731 (2014/06/09)
Newly discovered boryl sulfides and N-borylthioamides are shown to serve as neutral sources of sulfur nucleophiles in substitutions reactions. For example, heating of diMe-Imd-BH(SPh)2 with benzyl bromides, primary bromides, or acid chlorides provides the corresponding thioethers or thioesters in high yields. Likewise, N-phenyltetrazole thioethers/esters are made from a readily available N-borylthionotetrazole. The formation of the boryl sulfide and its onward nucleophilic substitution can be telescoped down to a one-pot reaction whose components are an NHC-borane (NHC-BH3), a disulfide, and an electrophile.
β-lactones as privileged structures for the active-site labeling of versatile bacterial enzyme classes
Boettcher, Thomas,Sieber, Stephan A.
supporting information; experimental part, p. 4600 - 4603 (2009/02/08)
(Chemical Equation Presented) A chemical proteomic strategy has been applied directly to bacterial proteomes, and b-lactones have been identified as important natural product derivatives with a high affinity to various enzyme classes (see picture). This a
A HIGHLY CONVENIENT PROCEDURE FOR THE HYDROLYSIS OF TERMINAL PHENYL VINYL SULFIDES
Reutrakul, Vichai,Poochaivatananon, Patcharin
, p. 535 - 536 (2007/10/02)
Terminal vinyl and chlorovinyl sulfides are hydrolyzed by 70percent perchloric acid-thiophenol in benzene to the corresponding diphenyl thioacetals and thioesters in good yields.
