Please use this identifier to cite or link to this item:
|Title:||Convenient entry to mono- and dinuclear palladium(II) benzothiazolin-2- ylidene complexes and their activities toward Heck Coupling|
|Authors:||Yen, S.K. |
|Citation:||Yen, S.K., Koh, L.L., Hahn, F.E., Huynh, H.V., Hor, T.S.A. (2006-10-09). Convenient entry to mono- and dinuclear palladium(II) benzothiazolin-2- ylidene complexes and their activities toward Heck Coupling. Organometallics 25 (21) : 5105-5112. ScholarBank@NUS Repository. https://doi.org/10.1021/om060510n|
|Abstract:||Under solventless conditions, benzothiazole reacts with benzyl bromide to give near-quantitative yield of the salt W-benzylbenzothiazolium bromide (A), which is a convenient air-stable heterocyclic carbene precursor. Treatment of A with Pd(OAc)2 in CH3CN affords the bis(carbene) complex cis-[PdBr2(NHC)2] (1) (NHC = N-benzylbenzothiazolin-2- ylidene). In DMSO, this reaction yields an unprecedented dinuclear N,S-heterocyclic carbene complex, [PdBr2(NHC)]2 (2). Complex 2 undergoes bridge cleavage reactions with CH3CN and DMF to give the mononuclear and solvated monocarbene complexes trans-[PdBr 2(NHC)(Solv)] [Solv = CH3CN (3) and DMF (4)]. All compounds have been fully characterized by 1H and 13C NMR spectroscopy, ESI or FAB mass spectrometry, and elemental analysis. The molecular structures of A and 1-4 have been determined by X-ray single-crystal diffraction. The catalytic activities of 1-4 toward Mizoroki-Heck coupling reactions of aryl bromides with tert-butyl acrylate are described and compared. © 2006 American Chemical Society.|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on May 20, 2018
WEB OF SCIENCETM
checked on Apr 16, 2018
checked on May 11, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.