کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1312826 | 975502 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Chiral tetradentate amine and tridentate aminocarbene ligands: Synthesis, reactivity and X-ray structural characterizations Chiral tetradentate amine and tridentate aminocarbene ligands: Synthesis, reactivity and X-ray structural characterizations](/preview/png/1312826.png)
(1R,2R)-diaminocyclohexane (1) and (1R,2R)-diaminodiphenylethylenediamine (2) were used as building blocks for the synthesis of chiral tetradentate diquinolyl-diamine and related diquinolyl-dihydroimidazolium salts. A neutral chiral palladium(II) complex was synthesized by reaction of palladium acetate with the tetradentate diquinolyl diamine derived from 2 and used as a homogeneous catalyst for the Heck reaction between styrene and haloarenes. A chiral tridentate aminocarbene was generated in situ by deprotonation of the dihydroimidazolium salt derived from 1 and allowed to react with CuI to give a new chiral quinolyl-carbene copper(I) complex.
The chiral tetradentate ligand 4 was prepared and reacted with Pd(OAc)2 to give a square planar complex in which the N–H groups are deprotonated. This complex catalyzes Heck reactions. Reaction of the deprotonated imidazolium cation 5 with CuI gives an NHC carbene complex.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 359, Issue 14, 1 November 2006, Pages 4549–4556