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Lah, Myoung Soo
Nanoporous Materials Lab
Research Interests
  • Metal-Organic Frameworks (MOFs)
  • Crystal Engineering
  • Supramolecular coordination chemistry

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Imidazolium and phosphonium alkylselenites for the catalytic oxidative carbonylation of amines: Mechanistic studies

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dc.contributor.author Kim, HS ko
dc.contributor.author Kim, YJ ko
dc.contributor.author Bae, JY ko
dc.contributor.author Kim, SJ ko
dc.contributor.author Lah, Myoung Soo ko
dc.contributor.author Chin, CS ko
dc.date.available 2014-09-16T06:57:46Z -
dc.date.created 2014-09-12 ko
dc.date.issued 2003-06 ko
dc.identifier.citation ORGANOMETALLICS, v.22, no.12, pp.2498 - 2504 ko
dc.identifier.issn 0276-7333 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/6082 -
dc.description.abstract The reactions of KSeO2(OCH3) (1) in methanol with [Rmim]Cl (Rmim = 1-alkyl-3-methylimidazolium) at room temperature give imidazolium-based ionic liquids containing methylselenite anion, [Rmim] [SeO2(OCH3)] (2a, R = n-C4H9; 3a, R = C2H5; 4a, R = CH3) respectively. Similarly, phosphonium methylselenites, [R4P][SeO2(OCH3)] (6a, R = n-butyl; 7a, R = ethyl) were prepared by reacting 1 with tetraalkylphosphonium bromides. The methoxy groups in imidazolium and phosphonium methylselenites were easily replaced by other alkoxy groups upon interaction with various alcohols. [1,3-dimethylimidazolium] [SeO2-(OCH3)] (4a) is slowly transformed into [1,3-dimethylimidazolium](2)[Se2O5] (5a) in the absence of methanol. An X-ray study reveals that 5a is a dimeric selenium complex consisting of two 1,3-dimethylimidazolium cations and Se2O52- anion. All the ionic liquid compounds containing methylselenite anion show surprisingly high activity for the oxidative carbonylation of aniline, even at temperatures as low as 40 degreesC, to give diphenylurea in high yield. The effects of molar ratio of aniline to catalyst, temperature, and solvent have been investigated. The plausible mechanism for the carbonylation reaction of aniline based on the H-1 and C-13 NMR studies using 3a is presented. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Imidazolium and phosphonium alkylselenites for the catalytic oxidative carbonylation of amines: Mechanistic studies ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-0038236917 ko
dc.identifier.wosid 000183363700023 ko
dc.type.rims ART ko
dc.description.wostc 28 *
dc.description.scopustc 31 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-09-12 *
dc.identifier.doi 10.1021/om030005f ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0038236917 ko
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