Thiol–ene click chemistry for the synthesis of highly effective glycosyl sulfonamide carbonic anhydrase inhibitors
作者:Mohamed-Chiheb Saada、Joanna Ombouma、Jean-Louis Montero、Claudiu T. Supuran、Jean-Yves Winum
DOI:10.1039/c3cc42541j
日期:——
Thiol-ene clickchemistry has been applied for obtaining sulfonamide carbonicanhydrase (CA, EC 4.2.1.1) inhibitors incorporating sugar moieties. Most of these new compounds were moderate CA I inhibitors, effective CA IIinhibitors, and low nanomolar/subnanomolar inhibitors of the tumor-associated isoforms CA IX and XII.
Stereoselective synthesis of C-ketosides by sequential intramolecular hydrogen atom transfer–intermolecular allylation reaction
作者:Angeles Martín、Inés Pérez-Martín、Luis M. Quintanal、Ernesto Suárez
DOI:10.1016/j.tetlet.2008.06.070
日期:2008.8
A tandem 1,5 or 1,6 hydrogen atom transfer (HAT)-radical allylation using carbohydrate models is described. The HAT reaction generated a C-glycos-1-yl radical intermediate, which added to allyltri-n-butyltin with high diastereoselectivity, to give C-ketosides with the quaternary carbon carrying two differently functionalized tethers. (C) 2008 Elsevier Ltd. All rights reserved.
Subtle Stereochemical and Electronic Effects in Iridium-Catalyzed Isomerization of <i>C</i>-Allyl Glycosides
作者:Ramesh Patnam、Juan M. Juárez-Ruiz、René Roy
DOI:10.1021/ol060671n
日期:2006.6.1
Stereoselective isomerization of C-allyl glycosides into (E)-C-vinyl glycosides or (Z)-exo-glycals was carried out in the presence of the cationic iridium(I) catalyst [(Ph2MeP)(2)Ir(cod)PF6]. The products of the isomerization were affected by the relative 1,2-stereochemical relationships and by the nature of the protecting groups. These effects are discussed along with a plausible reaction mechanism.
C-Glycosides of dodecanoic acid: new capping/reducing agents for glyconanoparticle synthesis
作者:C.V. Ramana、Kulbhushan A. Durugkar、Vedavati G. Puranik、Sachin B. Narute、B.L.V. Prasad
DOI:10.1016/j.tetlet.2008.08.030
日期:2008.10
A concise synthesis of 12-C-glycosylated dodecanoic acids employing an olefin cross-metathesis reaction is developed. Examination of these acids as capping agents for the synthesis of metal nanoparticles reveals that they do not cap the Co-metal nanoparticles synthesized in aqueous phase, but that two of them can reduce and cap the Ag nanoparticles in water without any aggregation. (C) 2008 Elsevier Ltd. All rights reserved.