We report herein the silver-catalyzed cycloisomerization of readily available N-(prop-2-yn-1-yl)pyridine-2-amines as a new and practical method for the synthesis of differently substituted 3-methylimidazo[1,2-a]pyridines. The isomerization reactions proceeded under mild reactions conditions to give good yields and excellent regioselectivity. A DFT-based mechanistic analysis is also reported.
作者:Anastasia Khandazhinskaya、Barbara Eletskaya、Ilja Fateev、Maria Kharitonova、Irina Konstantinova、Vladimir Barai、Alex Azhayev、Mervi T. Hyvonen、Tuomo A. Keinanen、Sergey Kochetkov、Katherine Seley-Radtke、Alex Khomutov、Elena Matyugina
DOI:10.1039/d1ob01069g
日期:——
the heterocyclic purine base is split into its two components, i.e. pyrimidine and imidazole. Herein, we present a series of new pyrazole-containing flex-bases and the corresponding fleximer analogues of 8-aza-7-deaza nucleosides. Subsequent studies found that pyrazole-containing flex-bases are substrates of purinenucleoside phosphorylase (PNP). We have compared the chemicalsynthesis of fleximers and
Hydroarylation of Arenes via Reductive Radical-Polar Crossover
作者:Autumn R. Flynn、Kelly A. McDaniel、Meredith E. Hughes、David B. Vogt、Nathan T. Jui
DOI:10.1021/jacs.0c03926
日期:2020.5.20
photocatalytic system for the dearomative hydroarylation of benzenederivatives has been developed. Using a combination of an organic photoredox catalyst and an amine reductant, this process operates through a reductive radical-polar crossover mechanism where aryl halide reduction triggers a regioselective radical cyclization event, followed by anion formation and quenching to produce a range of complex spirocyclic
Development of a Novel Process for the Kilogram-Scale Synthesis of Spiro[1<i>H</i>-pyrido[2,3-<i>d</i>][1,3]oxazine-4,4′-piperidine]-2-one
作者:Dale R. Mowrey、James J. Reif、Karen L. Milkiewicz、Shawn P. Allwein
DOI:10.1021/acs.oprd.8b00202
日期:2018.9.21
Spiro[1H-pyrido[2,3-d][1,3]oxazine-4,4′-piperidine]-2-one (3) is a key building block in many biologically active compounds. The synthesis of this compound, as reported in the literature, is low-yielding. We have discovered and developed a robust, high-yielding process to generate 3 as a bis-HCl salt using alternative starting materials and reaction conditions. The developed process was successfully
螺[1 H-吡啶并[2,3- d ] [1,3]恶嗪-4,4'-哌啶] -2-酮(3)是许多生物活性化合物的关键组成部分。如文献报道,该化合物的合成产率低。我们发现并开发了一种健壮的高产率工艺,可以使用替代的原料和反应条件生成3作为双HCl盐。所开发的过程已成功地以千克为单位进行了演示。两次批次的千斤实验室活动在> 99 HPLC面积百分比纯度中产生了3的双HCl盐,总产率为77%。
Compounds and methods for inhibition of HIV and related viruses
申请人:Medivir A/B
公开号:US05658907A1
公开(公告)日:1997-08-19
Treatment of AIDS, inhibition of the replication of HIV and related viruses thereof, and formulations using thiourea derivative compounds or salts thereof is disclosed. Also disclosed are novel thiourea derivative compounds.