oxazolidine (1) in ether or in hexane leads to 3-phenylbutanals having the S or R configuration, respectively, with high optical yield in the latter case (e.e. ⋍ 80%). The 1H NMR study of the intermediate oxazolidine allows accurate determination of the optical yield and could be applied to the determination of the absolute configuration and optical purity of other 3-arylalkanals.
                                    在
乙醚或己烷中,向手性
恶唑烷(1)中添加二甲基
铜碳酸锂可分别得到具有S或R构型的
3-苯基丁醛,在后一种情况下,其光学收率高(ee⋍80%)。中间体
恶唑烷的1 H NMR研究可准确测定光学收率,并可用于确定其他3-芳基
烷烃的绝对构型和光学纯度。