Configurational and conformational studies on some benzylidene derivatives of d-ribose and di-β-d-ribofuranose 1,5′:1′,5-dianhydride
作者:T.B. Grindley、W.A Szarek
DOI:10.1016/s0008-6215(00)82758-5
日期:1972.11
diverse conditions yields a variety of products, most of which are formed as mixtures of diastereoisomers. The conformations assumed by the furanose rings in the 2,3- O -benzylidene-β- D -ribose derivatives are discussed in relation to the coupling constants obtained by comparing the experimental and computed n.m.r. spectra.
Selective ring-opening polymerization of di-O-methylated and di-O-benzylated 1,4-anhydro-.alpha.-D-ribopyranoses and structure proof of synthetic cellulose-type polysaccharide (1 .fwdarw. 4)-.beta.-D-ribopyranan and (1 .fwdarw. 5)-.alpha.-D-ribofuranan
Polymerisation cationique a basses temperatures, en presence de pentafluorure de phosphore, en deux polyosides stereoreguliers
聚合阳离子 a 低音温度,存在 de pentafluorure dephosphore,en deux polyosides stereoregulators
Branching of poly(ADP-ribose): Synthesis of the Core Motif
作者:Hans A. V. Kistemaker、Herman S. Overkleeft、Gijsbert A. van der Marel、Dmitri V. Filippov
DOI:10.1021/acs.orglett.5b02143
日期:2015.9.4
The synthesis of the core motif of branched poly(adenosine diphosphate ribose) (poly(ADPr)) is described, and structural analysis reasserted the proposed stereochemistry for branching. For the synthesis, a ribose trisaccharide was first constructed with only alpha-O-glycosidic linkages. Finally, the adenine nucleobase was introduced via a Vorbruggen-type glycosylation reaction. The orthogonality of the selected protecting groups was demonstrated, allowing for the construction of branched poly(ADPr) oligomers in the near future.
Synthesis of polymerizable anhydrodeoxyribose derivatives