Regioselective Phosphorylation of Carbohydrates and Various Alcohols by Bacterial Acid Phosphatases; Probing the Substrate Specificity of the Enzyme fromShigella flexneri
作者:Teunie van Herk、Aloysius F. Hartog、Alida M. van der Burg、Ron Wever
DOI:10.1002/adsc.200505072
日期:2005.6
broad range of carbohydrates and alcohols. Many cyclic carbohydrates are phosphorylated in a regioselective manner. Non-cyclic carbohydrates are phosphorylated as well. Phosphorylation of linear alcohols, cyclic and aromatic alcohols is also possible. In all cases the acid phosphatase from Shigella prefers a primaryalcohol function above a secondary one. We conclude that these enzymes are an attractive
Human P2Y<sub>14</sub> Receptor Agonists: Truncation of the Hexose Moiety of Uridine-5′-Diphosphoglucose and Its Replacement with Alkyl and Aryl Groups
作者:Arijit Das、Hyojin Ko、Lauren E. Burianek、Matthew O. Barrett、T. Kendall Harden、Kenneth A. Jacobson
DOI:10.1021/jm901432g
日期:2010.1.14
Uridine-5′-diphosphoglucose (UDPG) activates the P2Y14 receptor, a neuroimmune system GPCR. P2Y14 receptor tolerates glucose substitution with small alkyl or aryl groups or its truncation to uridine 5′-diphosphate (UDP), a full agonist at the human P2Y14 receptor expressed in HEK-293 cells. 2-Thiouracil derivatives displayed selectivity for activation of the human P2Y14 vs the P2Y6 receptor, such as
Synthesis and Evaluation of Ketophosph(on)ates as β-Lactamase Inhibitors
作者:Senthil K. Perumal、R. F. Pratt
DOI:10.1021/jo060364v
日期:2006.6.1
PhCH2OCONHCH(R)COCR‘N2. The electrophilicity of the carbonyl group in the resulting phosph(on)ates was assessed by the degree of hydration in aqueous solution, determined from NMR spectra. These compounds inhibited typical class C and class D β-lactamases, particularly the latter group, but showed no activity against class A enzymes. To enhance the carbonyl electrophilicity, an α-difluorinated analogue (R =
Preparation and structure of n-alkyl ester derivatives of zirconium bis (monohydrogen orthophosphate) dihydrate with a layer structure
作者:Shoji Yamanaka、Makoto Matsunaga、Makoto Hattori
DOI:10.1016/0022-1902(81)80040-1
日期:1981.1
Zirconiumbis (monohydrogen orthophosphate) dihydrate with a layer structure, called γ-zirconium phosphate, has been heated with phosphoric acid esters of n-alkyl alcohols [n-CnH2n+1OPO3H2 (n = 1 ∼ 18)] under reflux in a mixture of water and acetone. Half of the interlayer monohydrogen orthophosphate groups are exchanged with a phosphate esters. Only monoesters are involved in the exchange even though
具有层状结构的双(正磷酸一氢)锆二水合物,称为γ-磷酸锆,已与正烷基醇[ n -C n H 2 n +1 OPO 3 H 2(n = 1〜18)的磷酸酯一起加热)]在水和丙酮的混合物中回流。一半的层间正磷酸单氢基团被磷酸酯交换。即使单酯和二酯的混合物用于回流,也只有单酯参与交换。X射线和电子显微镜检查表明,在反应过程中,γ-磷酸锆的层构架没有变化,而基间距(d001)随着磷酸酯烷基链中碳原子数(n)的增加而增加。的情节d 001 VS Ñ由两个线性关系的斜率,其中对于2.43和1.42埃/碳原子的Ñ ⩽4和Ñ分别⩾5。当所获得的化合物溶胀具有Ñ具有烷基链的那些交换磷酸酯类中的相同长度的烷基醇,所述基面间距的增加而线性与单斜率2.43埃/碳原子。斜率的变化归因于磷酸盐层之间烷基链的排列的变化,并且与聚乙烯晶体的结构进行了讨论。