beta-DIHYDROFURAN DERIVING COMPOUND, METHOD FOR PRODUCING beta-DIHYDROFURAN DERIVING COMPOUND OR beta-TETRAHYDROFURAN DERIVING COMPOUND, beta-GLYCOSIDE COMPOUND, METHOD FOR PRODUCING beta GLYCOSIDE COMPOUND, AND METHOD FOR PRODUCING 4'-ETHYNYL D4T AND ANALOGUE COMPOUNDS THEREOF
申请人:Iriyama Yusuke
公开号:US20120322995A1
公开(公告)日:2012-12-20
The invention provides a process for producing a β-dihydrofuran derivative represented by formula (1) or a β-tetrahydrofuran derivative represented by formula (4), characterized in that the process includes causing a dialkyl dicarbonate, a diaralkyl dicarbonate, or a halide to act on a diol compound represented by formula (2) or (3). The invention also provides a process for producing 4′-ethynyl-2′,3′-didehydro-3′-deoxythymidine or an analog thereof, the process including glycosylation and deprotection.
Selective recognition of uranyl ions from bulk of thorium(<scp>iv</scp>) and lanthanide(<scp>iii</scp>) ions by tetraalkyl urea: a combined experimental and quantum chemical study
作者:Bal Govind Vats、Debasish Das、Biswajit Sadhu、S. Kannan、I. C. Pius、D. M. Noronha、Mahesh Sundararajan、Mukesh Kumar
DOI:10.1039/c6dt01191h
日期:——
sustainable nuclear energy production. We report herein a known, but unexplored extractant, tetraalkyl urea, which shows supreme selectivity for uranium in the presence of interfering thorium and other lanthanide ions from a nitric acid medium. The structural characterization of the uranyl complex (UO2X2·2L, where X = NO3−, Cl− and Br−) by IR, NMR and single crystal X-ray diffraction provides insight
从水溶液中选择性分离铀酰离子是可持续生产核能的最重要标准之一。我们在此报告了一种已知的但未开发的萃取剂四烷基脲,该四烷基脲在存在来自硝酸介质的ide和其他镧系元素离子的干扰下显示出对铀的最高选择性。双氧铀的结构表征复合物(UO 2 X 2 ·2L,其中X = NO 3 - ,氯-和Br -),IR,NMR和单晶X射线衍射提供了对铀酰离子与配体之间强相互作用的深入了解。对铀酰离子的这种最高选择性的起源进一步得到电子结构计算的支持。与th相比,铀酰与萃取剂的结合在热力学上更有利,并且选择性是通过电子和空间效应的组合来实现的。
Leaving Groups as Traceless Topological Modifiers for the Synthesis of Topologically Isomeric Polymer Networks
作者:Yuwei Gu、Dominik Schauenburg、Jeffrey W. Bode、Jeremiah A. Johnson
DOI:10.1021/jacs.8b07967
日期:2018.10.31
structure, introducing potentially undesirable chemical components. Here, we address this deficiency by programming topology into network precursors through the incorporation of self-assembly motifs in leavinggroups, which become "traceless topological modifiers." Our method enables us to control polymer network topology using self-assembled structures as templates that are not themselves incorporated into
2,2-Disubstituted glycerol and glycerol-like compounds, compositions and methods of use
申请人:SCHERING CORPORATION
公开号:EP0327962A1
公开(公告)日:1989-08-16
Novel 2,2-disubstituted glycerol compounds are disclosed for use as anti-allergic and anti-inflammatory compounds. The compounds are antagonists of platelet activating factor ("PAF). Also disclosed are methods of synthesizing and using the compounds of the invention as well as pharmaceutical compositions thereof. The compounds have the formula
wherein R1, R2, R3, and R4 are as defined in the specification.
2,2-disubstituted glycerol and glycerol-like compounds, compositions and
申请人:Schering Corporation
公开号:US05185334A1
公开(公告)日:1993-02-09
Novel 2,2-disubstituted glycerol-like compounds are disclosed for use as anti-allergic and anti-inflammatory compounds. The compounds are antagonists of platelet activating factor ("PAF"). Also disclosed are methods of synthesizing and using the compounds of the invention as well as pharmaceutical compositions thereof. The compounds have the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are as defined in the specification.