Bulletin of the Chemical Society of Japan p. 838 - 844 (1989)
Update date:2022-07-30
Topics: Synthesis Crown ethers Thiophene Reductive desulfurization Subunit
Sone, Tyo
Sato, Kazuaki
Ohba, Yoshihiro
Crown ethers containing 3,4-thiophenediyl and 3,4-thiophenediylbis(methylene) subunits as a ring constituent were prepared starting from 2,5-bis(ethoxycarbonyl)-3,4-thiophenediol and 2,5-dichloro-3,4-bis(chloromethyl)thiophene, respectively.A Raney nickel desulfurization of the thiophene-containing crown ethers afforded crown ethers having two adjacent side chains, such as a methyl or ethoxycarbonylmethyl group.The extraction ability of these crown ethers towards alkali metal cations was also examined by the solvent extraction method.
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Doi:10.1021/jo00280a037
(1989)Doi:10.1002/ardp.19582910905
(1958)Doi:10.1055/s-0039-1690242
(2020)Doi:10.1039/c0cc03314f
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