HMDS/KI a simple, a cheap and efficient catalyst for the one-pot synthesis of <i>N</i>-functionalized pyrimidines
作者:Az-Eddine El Mansouri、Mohamed Zahouily、Hassan B. Lazrek
DOI:10.1080/00397911.2019.1602655
日期:2019.7.18
Abstract The syntheses of N-Alkylpyrimidine derivatives by reacting pyrimidin-2,4-diones with appropriate alkyl halide under microwave irradiation at 400 W were compared to the conventional synthesis route. These methodologies are regioselective and compatible with numerous substrates and furnish the corresponding N-alkylpyrimidines in good yields using a cheap catalyst HMDS/KI in MeCN. A comparison
Cu/Graphene/Clay Nanohybrid: A Highly Efficient Heterogeneous Nanocatalyst for Synthesis of New 5-Substituted-1<i>H</i>-Tetrazole Derivatives Tethered to Bioactive<i>N</i>-Heterocyclic Cores
bioactive N‐heterocyclic cores were synthesized through [3 + 2] cycloadditionreactions between alkyl nitriles (RCN) and NaN3 in the presence of Cu/aminoclay/reduced graphene oxide nanohybrid (Cu/AC/r‐GO nanohybrid) as a heterogeneous nanocatalyst in water/i‐PrOH (50:50, V/V) media at reflux condition. The influence of factors on a sample reaction including solvent type, temperature, and catalyst amount
在存在铜/氨基粘土/还原氧化石墨烯纳米杂化物(铜)的情况下,通过烷基腈(RCN)和NaN 3之间的[3 + 2]环加成反应,合成了一系列具有生物活性N杂环核的5位取代的1 H-四唑。/ AC / R-GO纳米杂化物)作为在水中的纳米催化剂的异构/我‐PrOH(50:50,V / V)介质在回流条件下。讨论了因素对样品反应的影响,包括溶剂类型,温度和催化剂用量。该当前协议具有许多优点,包括价格便宜,对环境无害,基材范围广,产率高以及易于处理。该协议中使用的Cu / AC / r-GO是一种低成本催化剂,被证明具有相当大的化学和热稳定性。这种非吸湿性催化剂可以轻松回收,再利用和存储,以进行许多连续的反应,而不会显着降低反应活性。
Synthesis, Antifungal Evaluation and Molecular Docking Studies of Some Tetrazole Derivatives
作者:Mohammad Hosein Afsarian、Mojtaba Farjam、Elham Zarenezhad、Somayeh Behrouz、Mohammad Navid Soltani Rad
DOI:10.17344/acsi.2019.4992
日期:——
A facile and simple protocol for the [3+2] cycloaddition of alkyl nitriles (RCN) with sodium azide (NaN 3 ) in the presence of copper bis(diacetylcurcumin) 1,2-diaminobenzene Schiff base complex, SiO 2 -[Cu-BDACDABSBC] as a heterogeneous catalyst in the presence of ascorbic acid and a solution of water/ i -PrOH (50:50, V/V) media at reflux condition is described. The supported catalyst was prepared
Syntheses of N-Substituted Thymine Thioacetamides. A Novel Approach to Site Selective Acylation of Diaminoalkanes
作者:Jarosław Spychała
DOI:10.1016/s0040-4020(00)00704-3
日期:2000.9
having at least one amino group attached to an aliphatic chain, has been synthesized from (1-thyminyl)thioacetamide in good isolated yields (69–86%). N-[2-(4-Imidazolyl)ethyl](1-thyminyl)thioacetamide was hydrolyzed to its amide on prolonged heating in water. Ammonium sulfide (20–22% solution in water) has found interesting new applications in the efficient synthesis of N-[2-(3-indolyl)ethyl](1-thyminyl)thioacetamide
A Facile Synthesis of 1-Monosubstituted and Unsymmetrically 1,3-Disubstituted Uracils
作者:Harjit Singh、Pawan Aggarwal、Subodh Kumar
DOI:10.1055/s-1990-26926
日期:——
Heating of 2,4-bis(trimethylsiloxy)pyrimidine with functionalised alkyl halides in 1,2-dichloroethane in the presence of iodine affords exclusively 1-substituted uracils, which can be benzylated at N-3 with benzyl chloride under phase-transfer catalysis.