Fluorous Linker Facilitated Synthesis of Teichoic Acid Fragments
摘要:
The use of perfluorooctylpropylsulfonylethanol as a new phosphate protecting group and fluorous linker is evaluated in the stepwise solution phase synthesis of a number of biologically relevant (carbohydrate substituted) glycerol teichoic acid fragments. Teichoic acid fragments, up to the dodecamer level, were assembled by means of phosphoramidite chemistry, using a relatively small excess of the building blocks and a repetitive efficient purification procedure of the protected intermediates by fluorous solid phase extraction (F-SPE).
Methylsulfonylethoxycarbonyl (Msc) and fluorous propylsulfonylethoxycarbonyl (FPsc) as hydroxy-protecting groups in carbohydrate chemistry
摘要:
The methylsulfonylethoxycarbonyl (Msc) group is presented as a non-lipophilic, base-labile, participating protecting group for carbohydrate alcohols. It can be introduced using Msc-Cl and pyridine and is readily cleaved via beta-elimination under mild basic conditions. Its fluorous counterpart, the perfluorooctyl propyl-sulfonylethoxycarbonyl (FPsc) group, is used in a 'light fluorous' trisaccharide synthesis sequence. (C) 2009 Elsevier Ltd. All rights reserved.
Light fluorous synthesis of glucosylated glycerol teichoic acids
作者:W.F.J. Hogendorf、A. Kropec、D.V. Filippov、H.S. Overkleeft、J. Huebner、G.A. van der Marel、J.D.C. Codée
DOI:10.1016/j.carres.2012.02.023
日期:2012.7
We here describe the synthesis of glucosylated teichoic acid (TA) fragments using two complementary fluorous scaffolds. The use of a perfluorooctylpropylsulfonylethyl (F-Pse) linker in combination with (glucosyl) glycerol phosphoramidite building blocks allows for the assembly of TA fragments with a terminal phosphate mono-ester, whereas the use of a perfluorooctylsuccinyl spacer delivers TA oligomers featuring a terminal alcohol functionality. These complementary linker systems have been developed because the nature of the TA chain terminus can play a role in the biological activity of the synthetic TAs. A novel alpha-glucosylated glycerolphosphoramidite building block is introduced to allow for a robust light fluorous synthetic protocol. (C) 2012 Elsevier Ltd. All rights reserved.
Methylsulfonylethoxycarbonyl (Msc) and fluorous propylsulfonylethoxycarbonyl (FPsc) as hydroxy-protecting groups in carbohydrate chemistry
作者:Asghar Ali、Richard J.B.H.N. van den Berg、Herman S. Overkleeft、Dmitri V. Filippov、Gijsbert A. van der Marel、Jeroen D.C. Codée
DOI:10.1016/j.tetlet.2009.02.146
日期:2009.5
The methylsulfonylethoxycarbonyl (Msc) group is presented as a non-lipophilic, base-labile, participating protecting group for carbohydrate alcohols. It can be introduced using Msc-Cl and pyridine and is readily cleaved via beta-elimination under mild basic conditions. Its fluorous counterpart, the perfluorooctyl propyl-sulfonylethoxycarbonyl (FPsc) group, is used in a 'light fluorous' trisaccharide synthesis sequence. (C) 2009 Elsevier Ltd. All rights reserved.
Fluorous Linker Facilitated Synthesis of Teichoic Acid Fragments
作者:Wouter F. J. Hogendorf、Lucien N. Lameijer、Thomas J. M. Beenakker、Herman S. Overkleeft、Dmitri V. Filippov、Jeroen D. C. Codée、Gijsbert A. Van der Marel
DOI:10.1021/ol2033652
日期:2012.2.3
The use of perfluorooctylpropylsulfonylethanol as a new phosphate protecting group and fluorous linker is evaluated in the stepwise solution phase synthesis of a number of biologically relevant (carbohydrate substituted) glycerol teichoic acid fragments. Teichoic acid fragments, up to the dodecamer level, were assembled by means of phosphoramidite chemistry, using a relatively small excess of the building blocks and a repetitive efficient purification procedure of the protected intermediates by fluorous solid phase extraction (F-SPE).