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- Title
2,5-Bis(2-(diphenylphosphino)phenyl)-1,3,4-oxadiazole ligands and their Cu(I) complexes for Sonogashira.
- Authors
Lin, Cai ‐ Xia; Zhu, Jia ‐ Fang; Li, Qing ‐ Shan; Ao, Li ‐ Hua; Jin, Yan ‐ Juan; Xu, Feng ‐ Bo; Hu, Fang ‐ Zhong; Yuan, Yao ‐ Feng
- Abstract
Two diphosphane ligands - 2,5-bis(2-(diphenylphosphino)-5-R)phenyl)-1,3,4-oxadiazole ( L1, R = H, L2, R = OMe) and their binuclear complexes, L1Cu and L2Cu, were prepared and characterized. The molecular structures of L1Cu and L2Cu, as perchlorate salts, were established by X-ray crystallography, which showed them to be binuclear complexes with each Cu atom tetrahedrally coordinated by two P atoms and two N atoms. The ligands and their Cu(I) complexes catalyzed Sonogashira of iodobenzene with phenylacetylene in the presence of K2CO3 under Pd-free conditions. catalyzed by L1 or L2 with Cu(MeCN)4ClO4 in situ exhibited better yields than those by the corresponding Cu(I) complexes L1Cu or L2Cu. Detailed studies showed L1 or L2 with Cu(MeCN)4ClO4 to be suitable catalysts for the of terminal alkynes and aryl halides. The of aryl iodides with electron-withdrawing groups showed better results. Copyright © 2014 John Wiley & Sons, Ltd.
- Subjects
SONOGASHIRA reaction; LIGANDS (Chemistry); PERCHLORATES; IODOBENZENE
- Publication
Applied Organometallic Chemistry, 2014, Vol 28, Issue 4, p298
- ISSN
0268-2605
- Publication type
Article
- DOI
10.1002/aoc.3124