One-Step Synthesis of Chiral Dimethyl 2-Oxo-3-phenyl-glutarate in the Asymmetric Triple-carbonylation of Styrene
作者:Lailai WANG、Qinsheng ZHANG、Yuming CUI
DOI:10.1016/s1872-2067(10)60253-7
日期:2011.1
palladium 2,4-pentanedionate, have been described. These complexes were found to be effective in the asymmetric triple-carbonylation of styrene, reaching up to [α]D20 = +27o (c, 0.28, CH2Cl2) for dimethyl 2-oxo-3-phenyl-glutarate using benzoquinone as oxidant, p-toluenesulfonic acid as co-catalyst, and methanol as solvent.
原位制备由(S)-2,2',6,6'-四甲氧基-4,4'-双(二苯基膦)-3,3'-联吡啶((S)-2,2',6,6'-四甲氧基-4,4'-双(二苯基膦)-3,3'-联吡啶(S )-P-PHOS) 和 2,4-戊二酸钯,已被描述。发现这些配合物在苯乙烯的不对称三羰基化中是有效的,对于使用苯醌作为氧化剂的 2-氧代-3-苯基戊二酸二甲酯,达到 [α]D20 = +27o (c, 0.28, CH2Cl2),p -甲苯磺酸为助催化剂,甲醇为溶剂。