Fe
<sub>3</sub>
O
<sub>4</sub>
@L‐lysine‐Pd(0) organic–inorganic hybrid: As a novel heterogeneous magnetic nanocatalyst for chemo and homoselective [2 + 3] cycloaddition synthesis of 5‐substituted 1H‐tetrazoles
An efficient and sustainable synthetic protocol has been presented to synthesis and 5‐substituted1H‐tetrazole privileged heterocyclic substructures. The synthetic protocolinvolves two‐component reaction between aryl nitriles and NaN3 in water using complex of L‐lysine‐palladium nanoparticles (NPs) modified Fe3O4 nanoparticles as magnetically separable, recyclable, and reusable heterogeneous catalyst
已经提出了一种有效且可持续的合成方案,用于合成和5取代的1H-四唑特权杂环亚结构。合成方案涉及使用L-赖氨酸-钯纳米粒子(NPs)修饰的Fe 3 O 4纳米粒子复合物作为磁性可分离,可回收和可重复使用的多相催化剂,使芳基腈与水中的NaN 3之间发生两组分反应。磁性可回收L-赖氨酸-Pd(0)修饰的Fe 3 O 4纳米粒子被用于5个取代的1H-四唑的[2 + 3]环加成合成中。该策略的优势包括昂贵的Pd NP的易于回收和有效的可重复使用性,[2 + 3]环加成的高收率,较短的反应时间,并且所有报道的合成策略都在水中作为绿色溶剂广泛应用基材范围。
Preparation of 5-Substituted 1<i>H</i>-Tetrazoles Catalyzed by Scandium Triflate in Water
作者:Adiel Coca、Evan Turek、Liana Feinn
DOI:10.1080/00397911.2014.957775
日期:2015.1.17
Abstract Several 5-substituted1H-tetrazoles were prepared in water or isopropanol/water mixtures using microwave heating. Good yields were obtained for the [2 + 3] cycloaddition of sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles when catalyzed by scandium triflate. The reactions were typically heated for 1 h at 160 °C in a 3:1 isopropanol/water mixture to obtain the best yields
Microwave Synthesis of 5-Substituted 1<i>H</i>-Tetrazoles Catalyzed by Bismuth Chloride in Water
作者:Adiel Coca、Liana Feinn、Joshua Dudley
DOI:10.1080/00397911.2014.989451
日期:2015.4.18
Abstract Bismuth chloride was used to catalyze the [2 + 3] cycloaddition between sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles. A number of 5-substituted1H-tetrazoles were synthesized in water or isopropanol/water mixtures using microwave heating. Good yields were obtained for these reactions when heated for 1 h at 120–160 °C in a 3:1 isopropanol/water mixture. A few of the
Highly Efficient Synthesis of 5-Substituted 1H-Tetrazoles Catalyzed by Cu-Zn Alloy Nanopowder, Conversion into 1,5- and 2,5-Disubstituted Tetrazoles, and Synthesis and NMR Studies of New Tetrazolium Ionic Liquids
作者:Gopalakrishnan Aridoss、Kenneth K. Laali
DOI:10.1002/ejoc.201100957
日期:2011.11
synthesize several novel tetrazolium ionic liquids (ILs) with EtSO4–, OTf–, and NTf2– counterions. Whereas alkylation of the 2,5-dialkyltetrazoles selectively gave the N-4 alkylated onium salts, with the 1,5-dialkyl derivatives approximately 1:1 mixtures of two tetrazolium salts were formed by alkylation at N-3 and N-4. The triflate and ethyl sulfate salts are room-temperature ILs that are hydrophilic, whereas
Syntheses of 5-Substituted 1H-tetrazoles Catalyzed by Reusable Cu(II)-NaY Zeolite from Nitriles
作者:K. Sudhakar、B. Purna Chandra Rao、B. Prem Kumar、M. Suresh、S. Ravi
DOI:10.14233/ajchem.2017.20337
日期:——
Cu(II)-NaY heterogeneous catalyst is used for the synthesis of 5-substituted 1H-tetrazoles by [2+3]-cycloaddition of sodium azide and nitriles. The salient features of this process are low reaction times, mild reaction conditions and high yields. The catalyst is recovered and reused for several cycles with consistent activity.