Asymmetric synthesis of benzilic acid analogues using 8-phenylmenthol as a chiral auxiliary
作者:Dale O. Kiesewetter
DOI:10.1016/s0957-4166(00)80069-5
日期:1993.10
ligands required the preparation of chiral fluoroalkyl benzilic acids. An enantioselective synthesis of substituted benzilic acids was achieved using 8-phenylmenthol as the chiral auxiliary. Grignard addition to the si face of 8-phenylmenthyl benzoylformate 7 proceeded with high selectivity. The results of the chiral induction support assignments of the chirality of benzilic acids previously resolved
我们合成18 F-标记的毒蕈碱受体配体的程序需要制备手性氟烷基苯甲酸。使用8-苯基薄荷醇作为手性助剂,实现了对取代苯甲酸的对映选择性合成。在8-苯基薄荷基苯甲酰基甲酸酯7的si表面上进行格氏试剂以高选择性进行。手性诱导的结果支持先前通过结晶拆分的苯甲酸的手性分配。该方法用于合成(R)-奎宁环烷基-(R)-(4-碘)苯甲酸酯,事实证明与真实样品相同。另外,该方法允许以立体选择性的方式制备(R)-和(S)-氟乙基苯甲酸。