Two-Dimensional Barriers for Probing Conformational Shifts in Macrocycles
作者:Shinya Kobori、Sungjoon Huh、Solomon D. Appavoo、Andrei K. Yudin
DOI:10.1021/jacs.1c01248
日期:2021.4.7
examination of the influence of heterocycle translocation on conformation. Kinetic studies using 1HNMR have revealed that the in-plane atom movement is fast in 17, 18, 19-membered rings but slows down in 16-membered rings. The analysis by NMR and MD simulation experiments is consistent with the maintenance of rare cis-amide motifs during conformational interconversion. Taken together, our investigation demonstrates
我们描述了大环骨架中复合二维屏障的开发和使用。这些可调结构的作用模式来自杂环重排。博尔顿-卡特里茨基反应已被确定为影响复合屏障的一种特别通用的手段,允许检查杂环易位对构象的影响。使用1 H NMR 的动力学研究表明,平面内原子运动在 17、18、19 元环中很快,但在 16 元环中减慢。NMR和MD模拟实验的分析与稀有顺式的维持一致-酰胺基序在构象互变期间。总之,我们的研究表明,杂环重排反应可用于控制大环骨架,并提供可能适用于开发各种其他构象控制元件的基本见解。
N-fluorination with cesium fluoroxysulfate
作者:Andrei A. Gakh、Sergei V. Romaniko、Bogdan I. Ugrak、Albert A. Fainzilberg
DOI:10.1016/s0040-4020(01)89746-5
日期:1991.8
Cesiumfluoroxysulfate was proved to be a N-fluorinating agent for some nitrogen compounds. Yields of products obtained mainly monofluoro-derivatives, depend on structures of initial nitrogen compounds. The ability of cesiumfluoroxysulfate for N-fluorination is much inferior to that of elemental fluorine and fluoromethylhypofluoride (CF3OF) but superior to that of perchlorylfluoride (FClO3).
[EN] ANTI-INFLAMMATORY MORPHOLIN-ACETAMIDE DERIVATIVES<br/>[FR] DERIVES DE MORPHOLINE-ACETAMIDE ANTI-INFLAMMATOIRES
申请人:GLAXO GROUP LTD
公开号:WO2003082862A1
公开(公告)日:2003-10-09
Certain compounds of formula (I): wherein: R1 represents substituted or unsubstituted heteroaryl; Y represents -(CRnaRnb)n-; Rna and Rnb are each independently hydrogen or C1-6alkyl; n is an integer from 1 to 5;R2 represents unsubstituted or substituted aryl or unsubstituted or substituted heteroaryl; R3 represents hydrogen or C1-6alkyl;and salts and solvates thereof are CCR-3 antagonists and are thus indicated to be useful in therapy.