2-(3-烷基-4-氧代-2-硫代噻唑烷-5-亚基)乙酸烷基酯在三乙胺存在下与腙酰氯反应,得到四取代的吡唑衍生物。形式上,这种转变被认为是硫代噻唑烷衍生物的环外碳-碳双键与原位生成的腈亚胺的 1,3-偶极环加成。这种有效的方法提供了对一系列结构不同的吡唑的快速访问。典型产品的结构由 X 射线晶体学证实。
Application of the β-cyclodextrin supramolecules as a green accelerator hosts in one-step preparation of highly functionalised rhodanine scaffolds
摘要:
beta-Cyclodextrin (beta-CD) supramolecule was found to be a convenient, green and economical tool in one-pot synthesis of rhodanine scaffolds as a highly efficient mediating agent in aqueous media in which the reaction accelerated to complete in 15min and room temperature. In this work, amines reacted with equimolar ratio of CS2 (not excess ratio of CS2) and then with activated acetylenes in the presence of beta-CD in aqueous media.
AbstractA diastereoselective practical route to functionalized spiropyrrolizidine-linked rhodanines has been developed via 1,3-dipolar cycloaddition reaction of alkylidenerhodanines with azomethine ylides, prepared in situ from l-proline and acetylenic esters, in EtOH at reflux. This protocol provided quick access to a range of structurally diverse target molecules in moderate-to-good yields. The structure
EtOAc-dispersed magnetic nanoparticles (DMNPs) of γ-Fe2O3 in the single-pot domino preparation of 5-oxo-2-thioxo-3-thiophenecarboxylate derivatives
作者:Sadegh Rostamnia
DOI:10.1016/j.crci.2013.03.002
日期:2013.11
Résumé EtOAc-dispersed magnetic nanoparticles (DMNPs) of γ-Fe2O3 represent a straightforward and green catalyst for the rapid three-component synthesis of 5-oxo-2-thioxo-3-thiophenecarboxylate derivatives as rhodanine skeletons via a single-pot domino process. The rhodanines were prepared over magnetic nanoparticles of γ-Fe2O3 without any salt or additives. Dispersed nano-γ-Fe2O3 have many advantages, such as stability in air, reusability, reactions with high efficiency, simple separation with magnetic external field from mixture reactions, chemical stability, and also low toxicity.
A facile and direct synthetic entry to rhodanine derivatives via the three-component coupling of carbon disulfide, primary amines, and acetylenic esters under neutral conditions in water is reported.
A Rapid, Catalyst-Free, Three-Component Synthesis of Rhodanines in Water Using Ultrasound
作者:Sadegh Rostamnia、Kamran Lamei
DOI:10.1055/s-0030-1260158
日期:2011.10
A green, efficient, rapid, high-yielding, catalyst-free method for the synthesis of rhodanines in water using ultrasonic irradiation is described. The procedure is straightforward and the rhodanine products are isolated by simple filtration.
Novel Synthesis of 5-Oxo-2-thioxo-2,5-dihydro-3-thiophenecarboxylate Derivatives in Non-Aqueous Medium
作者:Nitin Srivastava、M. Saxena
DOI:10.14233/ajchem.2019.21622
日期:——
A novel synthetic method of synthesis of 5-oxo-2-thioxo-2,5-dihydro-3-thiophenecarboxylate (rhodanine) derivative is being reported using primary amines and acetylenic ester, carbon disufide and Triton-B in non-aqueous medium.