采用溴化钯为催化剂前体,与非螯合型双齿膦配体L1(DPPFF)、联吡啶型双齿膦配体L2(P-PHOS)和二茂铁基手性双膦配体L3((S,Rp)-BPPF)制备络合物催化剂,以乙酰丙酮羰基铑为催化剂前体,与手性亚磷酸酯配体L4-L6制备络合物催化剂,将其分别应用于底物环己基甲醛或苯乙醛的不对称酰胺羰化反应中,研究结果表明,溴化钯与联吡啶型双齿膦配体L2络合物催化剂在苯乙醛的酰胺羰化反应中给出25%ee和11%的产率;溴化钯与非螯合型双齿膦配体L1络合物催化剂在环己基甲醛反应中给出4.3%ee和15%的产率.
The in situ prepared chiral catalyst of Pd/unchelating bidentate phosphine ligand L1(DPPFF),bipyridine bidentate phosphine ligand L2(P-PHOS),and bidentate phosphine ligand L3((S,Rp)-BPPF),and Rh/phosphite ligands L4-L6,have been applied in amidocarbonylation of cyclohexanecarboxaldehyde or phenylacetaldehyde.Pd/bipyridine bidentate phosphine ligand L2 gave the enantioselectivity 25%(S) and the yield 11% in amidocarbonylation of phenylacetaldehyde,When Pd/unchelating bidentate phosphine ligand L1 was employed in asymmetric amidocarbonylation of cyclohexanecarboxaldehyde,the enantioselectivity 4.3%(S) and the yield 15% were received.