Common-Intermediate Strategy for Synthesis of Conduritols and Inositols via β-Hydroxy Cyclohexenylsilanes
摘要:
[GRAPHICS]Syntheses of conduritols B-D and F and (D)-(+)-chiro- and neo-inositols from cyclohexenyl si lane intermediates are described. The key cyclohexylsilane intermediates 5 and 14 were synthesized by stereoselective olefin dihydroxylation of the corresponding cyclohexenylsilanes. Selective Peterson elimination reactions and Fleming-Tamao oxidations of 5 and 14 then delivered the targeted cyclitol derivatives.
Enantio- and Diastereoselective Synthesis of Cyclic β-Hydroxy Allylsilanes via Sequential Aldehyde γ-Silylallylboration and Ring-Closing Metathesis Reactions
摘要:
[GRAPHICS]Highly enantioenriched cyclic allylsilanes are prepared via stereoselective gamma-silylallylboration reactions of beta- or gamma-unsaturated aldehydes followed by ring-closing metathesis.
In vitro and in vivo comparative and competitive activity-based protein profiling of GH29 α-<scp>l</scp>-fucosidases
作者:Jianbing Jiang、Wouter W. Kallemeijn、Daniel W. Wright、Adrianus M. C. H. van den Nieuwendijk、Veronica Coco Rohde、Elisa Colomina Folch、Hans van den Elst、Bogdan I. Florea、Saskia Scheij、Wilma E. Donker-Koopman、Marri Verhoek、Nan Li、Martin Schürmann、Daniel Mink、Rolf G. Boot、Jeroen D. C. Codée、Gijsbert A. van der Marel、Gideon J. Davies、Johannes M. F. G. Aerts、Herman S. Overkleeft
DOI:10.1039/c4sc03739a
日期:——
Development of probes for active GH29 α-l-fucosidases.
GH29 α-l-fucosidases 的活性探针的开发。
Chiral Sulfur Ylides for the Synthesis of Bengamide E and Analogues
laboratories has been employed for the stereoselective synthesis of bengamide E (16) and analogues at the terminal olefinic position. In the event, the chiral sulfonium salt 30 was transformed into its corresponding sulfur ylide and reacted with aldehydes 21 and 44 to efficiently provide epoxy amides 31 and 45, respectively. To access the bengamides from these epoxy amides, we combined a synthetic strategy
A ring closing metathesis strategy for carbapyranosides of xylose and arabinose
作者:Clayton E. Mattis、David R. Mootoo
DOI:10.1016/j.carres.2016.03.002
日期:2016.4
The synthesis of beta-carba-xylo and arabino pyranosides of cholestanol is described. The synthetic strategy, which is analogous to the Postema approach to C-glycosides, centers on the ringclosingmetathesis of an enol ether-alkene precursor to give a cyclic enol ether that is elaborated to a carba-pyranoside via hydroboration-oxidation on the olefin. The method, which is attractive for its modularity
Stereoselective Total Synthesis of Aminoiminohexitols via Carbamate Annulation
作者:Anna L. Win-Mason、Seino A. K. Jongkees、Stephen G. Withers、Peter C. Tyler、Mattie S. M. Timmer、Bridget L. Stocker
DOI:10.1021/jo201151b
日期:2011.12.2
New methodology for the preparation of a variety of aminoiminohextitols is described. Key in the synthesis is the application of a diastereoselective Strecker reaction and the extension of our carbamateannulationmethodology to protected and functionalized alkenylamines. Insight into the effects that the substitution patterns of the alkenylamines have on the diastereoselectivity of the iodocyclization
Stereoselective Strecker and Carbamate Annulation Methodology for the Synthesis of 1-Amino-1,2,5-trideoxy-2,5-imino-L-iditol
作者:Anna L. Win-Mason、Emma M. Dangerfield、Peter C. Tyler、Bridget L. Stocker、Mattie S. M. Timmer
DOI:10.1002/ejoc.201100523
日期:2011.7
efficient and highly stereoselectivesynthesis of L-ido-aminoiminosugar 3 has been described. Key in the synthesis is the application of a diastereoselective Strecker reaction and the extension of our carbamateannulationmethodology to protected and functionalized alkenylamines. In addition, the identification of the primary iodide as a key intermediate during the carbamateannulation reaction provides