کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1323926 | 977311 | 2006 | 8 صفحه PDF | دانلود رایگان |
Chiral bidentate ligands 1–3, which contain a combination of thiazolyl and pyridyl donors units, were prepared. The syntheses are facile and being based on Kröhnke condensation of a pinene derivative to form the pyridine ring. Modification at the 8-position of the tetrahydroquinoline ring can be carried out by alkylation reaction with 2a and 3a but not 1a. The structure of a copper(II) perchlorate complex of 1a was characterized with X-ray crystallography, which reveals the binding of the pyridyl–thiazole as a N–N donors at the copper center. The copper(I) thiazolyl–pyridine complexes prepared in situ are active catalysts in the enantioselective allylic oxidation of cyclohexene using tert-butyl perbenzoate as the oxidant. The isolated yields of the allylic benzoate were up to 98%, and enantioselectivity was up to 62% e.e.
Chiral bidentate pyridyl–thiazole ligands were prepared. The structure of a copper(II) perchlorate ligand complex was characterized with X-ray crystallography. The copper(I) thiazolyl–pyridine complexes prepared in situ are active catalysts in the enantioselective allylic oxidation of cyclohexene.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 691, Issue 10, 1 May 2006, Pages 2237–2244