A novel one pot multi-component strategy for facile synthesis of 5-aryl-[1,2,4]triazolidine-3-thiones
摘要:
We have disclosed an efficient, one pot, novel multi-component approach for the synthesis of 5-aryl-[1,2,4]triazolidine-3-thiones from aldehyde, hydrazine hydrate, and trimethylsilyl isothiocyanate (TMSNCS) in the presence of catalytic amount of sulfamic acid. High yields, easy work-up procedure, no chromatographic separation, and novelty in multi-component strategy are the main merits of the present strategy. (C) 2014 Published by Elsevier Ltd.
Synthesis of triazolidines and triazole using DMAP
作者:Devidas A. Mali、Vikas N. Telvekar
DOI:10.1080/00397911.2016.1263338
日期:2017.2.16
ABSTRACT An efficient methodology has been developed for the synthesis of 1,2,4-triazolidine-3-thione and 3-ethoxy-5-phenyl-4H-1,2,4 triazole using N,N-dimethylpyridine-4-amine (DMAP). Aldehydes and thiosemicarbazide were reacted in water at ambient temperature in presence of DMAP and provided corresponding products in good to moderate yield. GRAPHICAL ABSTRACT
An investigation was conducted into the influence of the aminoacids as organic modifiers in the facile synthesis of metal incorporated fluorapatites (FAp) and their properties. The nanostructured Sm doped fluorapatites (Sm-FAp) were prepared by a co-precipitation method using four different aminoacids, namely glutamic acid, aspartic acid, glycine and histidine. The materials were characterized by
Efficient synthetic route for thio-triazole derivatives catalyzed by iron doped fluorapatite
作者:Kranthi Kumar Gangu、Suresh Maddila、Surya Narayana Maddila、Sreekantha B. Jonnalagadda
DOI:10.1007/s11164-016-2730-5
日期:2017.3
conversion of various aromatic aldehydes to thio-triazole derivatives with ethanol as solvent was investigated. For the title reaction, glutamic acid assisted Fe-FAp displayed superior activity with 96 % yield in a short-interval of times (10 min) at room temperature. Employing the optimized conditions, six different 1,2,4-triazolidine-3-thione derivatives were synthesized in excellent yields (91–96 %) at
Sm2O3/Fluoroapatite as a reusable catalyst for the facile, green, one-pot synthesis of triazolidine-3-thione derivatives under aqueous conditions
作者:Surya Narayana Maddila、Suresh Maddila、Kranthi Kumar Gangu、Werner E. van Zyl、Sreekantha B. Jonnalagadda
DOI:10.1016/j.jfluchem.2017.01.012
日期:2017.3
A new series of fourteen triazolidine-3-thione derivatives (11 compounds) were synthesized via the reaction of aromatic aldehydes with thiosemicarbazide with samaria loaded fluorapatite, (Sm2O3/FAp) as catalyst in aqueous media. Fluoroapatite proved superior as support relative to hydroxyapatite in terms of improved yield and reduced reaction time. The new catalyst, Sm/FAp was characterized by various
在含水介质中,以芳香族醛类与硫代氨基脲与负载am草的氟磷灰石(Sm 2 O 3 / FAp)为催化剂,合成了一系列新的十四个三唑烷-3-硫酮衍生物(11种化合物)。相对于羟基磷灰石,氟磷灰石被证明在提高产率和减少反应时间方面作为载体更好。新的催化剂Sm / FAp通过多种仪器技术进行了表征,包括XRD,SEM,TEM和BET。催化剂易于分离和重复使用七次,而活性没有明显降低。报告的策略具有许多优点,例如易于制备,绿色溶剂,缩短了反应时间,出色的产品收率(92%至97%)以及操作简便。
Decorated multi-walled carbon nanotubes with Sm doped fluorapatites: synthesis, characterization and catalytic activity
作者:Kranthi Kumar Gangu、Suresh Maddila、Surya Narayana Maddila、Sreekantha B. Jonnalagadda
DOI:10.1039/c6ra08733g
日期:——
Novel and sustainable heterogeneous catalysts, namely, multi-walled carbon nanotubes (MWCNT) decorated with Sm doped fluorapatite nanocomposites (MWCNT/Sm-FAp) were prepared with different loadings of Sm (1%, 2%, 3%, 5%, and 7%).