Preparation of chiral phosphorus, sulfur and selenium containing 2-aryloxazolines
作者:Markus Peer、Johannes C. de Jong、Matthias Kiefer、Thomas Langer、Heiko Rieck、Heico Schell、Peter Sennhenn、Jürgen Sprinz、Henning Steinhagen、Burkhard Wiese、Günter Helmchen
DOI:10.1016/0040-4020(96)00267-0
日期:1996.5
synthetic amino alcohols. For oxazoline formation three procedures were employed: (i) one pot condensation with a 2-halobenzoic acid, (ii) ZnCl2 catalyzed condensation with a 2-halobenzonit-rile, and (iii) a three step sequence via a 2-halobenzamide and a tosylate or chloride. Phosphinooxazolines containing stereogenic phosphorus were prepared by either diastereoselective nucleophilicsubstitution of halogenide
由市售或合成的氨基醇制备一系列对映体纯的2- [2-(二芳基膦基)芳基]-恶唑啉。对于恶唑啉的形成,采用了三种程序:(i)与2-卤代苯甲酸一锅缩合,(ii)ZnCl 2与2-卤代苯甲腈-苯胺催化缩合,和(iii)通过2-卤代苯甲酰胺的三步顺序和甲苯磺酸盐或氯化物。通过非对映选择性亲核取代Ar 1 Ar 2 PC1的卤化物或通过LiPAr 1 Ar 2亲核芳族取代制备含有立体异构磷的膦恶唑啉。另外,制备了硫和硒类似物。
Allen, Joanne V.; Coote, Steven J.; Dawson, Graham J., Journal of the Chemical Society. Perkin transactions I, 1994, # 15, p. 2065 - 2072
作者:Allen, Joanne V.、Coote, Steven J.、Dawson, Graham J.、Frost, Christopher G.、Martin, Christopher J.、Williams, Jonathon, M.
DOI:——
日期:——
Ir(I) complexes with oxazoline-thioether ligands: nucleophilic attack of pyridine on coordinated 1,5-cyclooctadiene and application as catalysts in imine hydrogenation
作者:Ester Guiu、Carmen Claver、Sergio Castillón
DOI:10.1016/j.jorganchem.2004.03.015
日期:2004.6
Oxazoline-thioether ligands 6-11 react with [Ir(eta(4)-COD)Py-2]PF6 (COD= C8H12 = 1,5-cyclooctadiene) to give [Ir(sigma-eta(2)-C8H12Py-)L] PF6 (L-oxazoline-thioether ligand) (12a-d) complexes resulted from the coordination of ligand to the metal and subsequent nucleophilic attack of pyridine to one of the double carbon bond of COD with concomitant iridium-carbon bond formation. When [Ir(eta(4)-COD)(2)]BF4 was used as starting material, the reaction with ligands 7, 9 afforded the complexes [Ir(eta(4)-COD)L]BF4. Application of these iridium complexes to the reduction of N-(alpha-methyl)benzylidenbenzylamine gave low or negligible enantioselectivity. (C) 2004 Elsevier B.V. All rights reserved.