Convenient synthesis of long alkyl-chain triazolylglycosides using ionic liquid as dual promoter-solvent: Readily access to non-ionic triazolylglycoside surfactants for evaluation of cytotoxic activity
one-pot synthesis of long alkyl-chain triazolylglycosides using ionicliquid as dual promoter and solvent is described via a sequential one-pot two-step glycosidation-CuAAc click reaction. The reaction was carried out using commercially available substrates, including glycosyl bromides, sodium azide and various long alkyl-chain alkynes to achieve the corresponding products in moderate to high yields
A series of novel haloglycolipids were synthesized based on Cu(I) catalyzed Huisgen's [3 + 2] cycloaddition reaction of diversely functionalized azides and alkynes, using a mixture of N-bromosuccinimide and Cu(I) halide as the halogensource. Since halogen atoms, like bromine and iodine, with a very high scattering power facilitate the solving of crystal structures, the title haloglycolipids could
Synthesis of Pd Complexes Containing Tailed NHC Ligands and Their Use in a Semicontinuous Membrane-Assisted Suzuki Cross-Coupling Process
作者:Dominic Ormerod、Matthieu Dorbec、Eugen Merkul、Nadya Kaval、Nicolas Lefèvre、Steven Hostyn、Lies Eykens、Jo Lievens、Sergey Sergeyev、Bert U. W. Maes
DOI:10.1021/acs.oprd.8b00273
日期:2018.11.16
Pd complexes suitable for a semicontinuous Suzukicross-couplingreaction based on a membrane-assisted reactor. These Pd complexes contain tailed N-heterocyclic carbene (NHC) ligands, allowing internal catalyst recovery by organic solvent nanofiltration with top-layer-modified ceramic membranes. These membranes give selective nanofiltration of the catalyst based on a combination of size exclusion and
Six series of semisynthetic lipophilic glycopeptideantibiotic derivatives were evaluated for in vitro activity against influenza A and B viruses. The new teicoplanin pseudoaglycon-derived lipoglycopeptides were prepared by coupling one or two side chains to the N-terminus of the glycopeptide core, using various conjugation methods. Three series of derivatives bearing two lipophilic groups were synthesized