开发了一种腺嘌呤选择性宿主分子的新结构,该结构具有五六十五元杂芳族环和两个氨基甲酰基NH位的相关链接。这种结构为腺嘌呤核苷碱基提供了正确定向的互补氢键位点阵列,利用了Watson-Crick和Hoogsteen型相互作用。通过多个氢键与腺嘌呤核碱基的络合得到(1)1 H NMR光谱的支持。这种类型的宿主在络合中显示出高选择性,并伴随着对CHCl(3)中脂化腺苷的荧光反应。此外,通过使用带有PVC支撑的溶剂聚合物膜的离子选择电极,对5'-GMP,5'-CMP和5'-UMP的5'-单磷酸腺苷获得了显着的选择性电位响应。这表明通过膜-水界面识别了水溶性核苷酸客体。这些发现有望为生物系统中单核苷酸的人工传感系统的开发提供可靠的基础。
开发了一种腺嘌呤选择性宿主分子的新结构,该结构具有五六十五元杂芳族环和两个氨基甲酰基NH位的相关链接。这种结构为腺嘌呤核苷碱基提供了正确定向的互补氢键位点阵列,利用了Watson-Crick和Hoogsteen型相互作用。通过多个氢键与腺嘌呤核碱基的络合得到(1)1 H NMR光谱的支持。这种类型的宿主在络合中显示出高选择性,并伴随着对CHCl(3)中脂化腺苷的荧光反应。此外,通过使用带有PVC支撑的溶剂聚合物膜的离子选择电极,对5'-GMP,5'-CMP和5'-UMP的5'-单磷酸腺苷获得了显着的选择性电位响应。这表明通过膜-水界面识别了水溶性核苷酸客体。这些发现有望为生物系统中单核苷酸的人工传感系统的开发提供可靠的基础。
Synthesis of Functionalized Oxazolines and Oxazoles with DAST and Deoxo-Fluor
作者:Andrew J. Phillips、Yoshikazu Uto、Peter Wipf、Michael J. Reno、David R. Williams
DOI:10.1021/ol005777b
日期:2000.4.1
[formula: see text] A mild and highly efficient cyclization of beta-hydroxy amides to oxazolines is described using DAST and Deoxo-Fluor reagents. A one-pot protocol for the synthesis of oxazoles from beta-hydroxy amides is also presented.
Synthesis of osmium and ruthenium complexes bearing dimethyl (S,S)-2,2′-(pyridine-2,6-diyl)-bis-(4,5-dihydrooxazol-4-carboxylate) ligand and application to catalytic H/D exchange
作者:Kenneth J.H. Young、Kapil S. Lokare、Chin Hin Leung、Mu-Jeng Cheng、Robert J. Nielsen、Nicos A. Petasis、William A. Goddard、Roy A. Periana
DOI:10.1016/j.molcata.2011.01.029
日期:2011.4
Using tridentate, neutral PyBox ligands, several new osmium and ruthenium complexes [M(PYBox)Cl-2(C2H4), where M= Ru, Os] have been prepared, all thermally stable. Some of these PyBox compounds are active for C-H activation of benzene. The Os(PyBox)Cl-2(C2H4) complex was characterized by X-ray diffraction. DFT calculations (B3LYP and M06 including Poisson-Boltzmann solvation) corroborate that the Os/PyBox complex in acetic acid (Delta G(dagger) =32.0 kcal/mol) is more reactive for benzene C-H activation than Ru/PyBox in basic conditions (Delta G(dagger) =34.8 kcal/mol at pH =13). The stability of hydroxide- and chloride-bridged dinuclear resting states determines calculated barriers. (C) 2011 Elsevier B.V. All rights reserved.
Highly Selective Recognition of Adenine Nucleobases by Synthetic Hosts with a Linked Five-Six-Five-Membered Triheteroaromatic Structure and the Application to Potentiometric Sensing of the Adenine Nucleotide
spectroscopy. This type of host displayed high selectivity in complexation, with an accompanying fluorescent response to lipophilized adenosine in CHCl(3). Furthermore, a remarkably selective potentiometric response was attained for adenosine5'-monophosphate over 5'-GMP, 5'-CMP, and 5'-UMP by using an ion-selective electrode with a PVC-supported solvent polymeric membrane. This indicates recognition of water-soluble
开发了一种腺嘌呤选择性宿主分子的新结构,该结构具有五六十五元杂芳族环和两个氨基甲酰基NH位的相关链接。这种结构为腺嘌呤核苷碱基提供了正确定向的互补氢键位点阵列,利用了Watson-Crick和Hoogsteen型相互作用。通过多个氢键与腺嘌呤核碱基的络合得到(1)1 H NMR光谱的支持。这种类型的宿主在络合中显示出高选择性,并伴随着对CHCl(3)中脂化腺苷的荧光反应。此外,通过使用带有PVC支撑的溶剂聚合物膜的离子选择电极,对5'-GMP,5'-CMP和5'-UMP的5'-单磷酸腺苷获得了显着的选择性电位响应。这表明通过膜-水界面识别了水溶性核苷酸客体。这些发现有望为生物系统中单核苷酸的人工传感系统的开发提供可靠的基础。