Planar chiral mimetics. A new approach to ligand design for asymmetric catalysis
作者:Geraint Jones、David C.D Butler、Christopher J Richards
DOI:10.1016/s0040-4039(00)01715-9
日期:2000.11
either a 2-(η5-cyclopentadienyl)(η4-tetraphenylcyclobutadiene)cobalt or a 2-(1,2,3,4,5-pentaphenyl)-ferrocene substituent. The influence of the bulky metallocenes result in these ligands mimicking planar chirality, as demonstrated by their catalysis of the addition of diethylzinc to benzaldehyde resulting in (R)-1-phenylpropanol (75% e.e.).
(小号) -丝氨酸甲酯易于转化到含有2-(4-η(羟甲基)恶唑啉配位体5 -环戊二烯基)(η 4 -tetraphenylcyclobutadiene)钴或2-(1,2,3,4,5- -五苯基)-二茂铁取代基。庞大的茂金属的影响导致这些配体模仿了平面手性,如它们催化向苯甲醛中添加二乙基锌催化生成(R)-1-苯基丙醇(75%ee)所证明的。