40254-01-1Relevant academic research and scientific papers
Synthesis of Unsubstituted Thia Crown Ethers via Intramolecular Cyclization
Nakatsuji, Yohji,Watanabe, Yoshitaka,Okahara, Mitsuo
, p. 627 - 628 (1982)
A remarkable temperature dependence of the template effect of alkali metal cations was found in the cyclization of thio analogs of penta- or hexaethylene glycols to thia 15-crown-5 or 18-crown-6.The optimum range of the reaction temperature was found to be 80-100 deg C.
New functionalized dithia-12(13)-crown-4 ethers: Synthesis, complex formation, and extraction capacity
Zenina,Rakhmanov,Bobyleva,Lukovskaya,Kuzmina,Abramov,Anisimov
, p. 835 - 843 (2007)
1,4-Dioxa-7,10-dithiacyclododecane-8-carbonitrile, 1,4-dioxa-7,11- dithiacyclotridecan-9-one, its 2,4-dinitrophenylhydrazone, and unsubstituted 7,10-dithia-12-crown-4 were synthesized. The complexing ability of the four synthesized dioxadithiacrown compounds toward Ag(I), Pb(II), Hg(II), and Cd(II) ions was assessed by 1H NMR. The extracting ability of the three dioxadithiacrown compounds with respect to the Sn(II) ion from aqueous solutions was studied. The thermal stability of 1,4-dioxa-7,10-dithia-cyclododecane and the corresponding 8-carbonitrile was investigated.
Synthesis of Oxygen and Sulphur Containing Crown Compounds under Solid-Liquid Phase Transfer Catalysis
Singh, Paramjit,Kumar, Manoj,Singh, Harjit
, p. 861 - 862 (2007/10/02)
Sulphur containing crown compounds and podands have been synthesized by intermolecular nucleophilic displacements of tosylates with thiolate ions generated in situ under solid-liquid phase transfer catalysis.
