CuFe2O4Nanoparticle Mediated Method for the Synthesis of 5-Substituted 1H-Tetrazoles from (E)-Aldoximes
作者:Ravi Kumar Akula、Chandra S. Adimulam、Sathaiah Gangaram、Raju Kengiri、Narsaiah Banda、Shanthan R. Pamulaparthy
DOI:10.2174/1570178611666140210213157
日期:2014.4
A strategy for the synthesis of 5-substituted 1H-tetrazoles from various (E)-aldoximes and sodium azide was
adopted using copper ferrite nanoparticles as a reusable catalyst.
A novel method for the synthesis of 5-substituted 1H-tetrazoles using diphenyl phosphorazidate (DPPA) has been developed. Aromatic and aliphatic aldoximes underwent cycloaddition to afford the corresponding 5-substituted 1H-tetrazoles with ease and efficiency.
Silica supported lanthanum triflate mediated synthesis of 5-substituted-1H tetrazoles
作者:Gangadhar A. Meshram、Shruti S. Deshpande、Pramod A. Wagh、Vipul A. Vala
DOI:10.1016/j.tetlet.2014.04.101
日期:2014.6
Silica supported lanthanumtriflate (Ln(OTf)3-SiO2) promoted synthesis of 5-substituted 1H-tetrazoles via [3+2] cycloaddition between aromatic/heteroaromatic nitriles and sodium azide is a high product yielding, facile, and straightforward procedure. Non toxicity, recovery, and reusability for three continuous cycles are the noteworthy features of the currently employed heterogeneous catalyst.
salts. CoFe2O4/[Cu/Zn‐MOF] showed to be a highlyreactive and easily recoverable magnetic catalyst for the preparation of tetrazole derivatives via one‐pot three‐component reactions of different aldehydes with hydroxyl amine hydrochloride and sodium azide. Our results (Fourier transform‐infrared, inductively coupled plasma‐optical emission spectroscopy, powder X‐ray diffraction, field emission‐scanning
首次开发了通过串联磁化和合成后修饰在磁性金属有机骨架(MOF)中进行金属交换的技术。通过浸渍法合成了新型的磁性混合金属金属有机骨架纳米复合材料CoFe 2 O 4 / [Cu 0.63 / Zn 0.37 -TMU-17-NH 2 ](CoFe 2 O 4 / [Cu / Zn-MOF])。在铜盐(II)的DMF溶液中以CoFe 2 O 4 / Zn-TMU-17-NH 2(CoFe 2 O 4 / Zn-MOF)为模板。钴铁2 O 4/ [Cu / Zn-MOF]是一种高反应性且易于回收的磁性催化剂,可通过不同醛与羟胺盐酸盐和叠氮化钠的单锅三组分反应制备四唑衍生物。我们的结果(傅立叶变换红外,电感耦合等离子体光谱发射光谱,粉末X射线衍射,场发射扫描电子显微镜,能量色散X射线光谱图和振动样品磁强计)显示出成功的部分金属交换在金属交换过程中,框架的完整性保持不变。
A Practical Synthesis of 5-Substituted 1H-Tetrazoles from Aldoximes Employing the Azide Anion from Diphenyl Phosphorazidate
racemization. 5-Substituted 1H-tetrazoles were effectively synthesized from aldoximes and diphenyl phosphorazidate (DPPA) under reflux conditions in xylenes. Various aldoximes underwent the cycloaddition reaction to afford the corresponding 5-substituted 1H-tetrazoles in short reaction times and in good yields. Chiral aldoximes derived from amino acids also gave aminotetrazoles with almost no racemization.