Asymmetric synthesis of optically active 2,3-diarylsuccinic acids by oxidative homocoupling of chiral 3-(arylacetyl)-2-oxazolidones
作者:Naoki Kise、Kimikage Kumada、Yuichi Terao、Nasuo Ueda
DOI:10.1016/s0040-4020(98)83006-8
日期:1998.3
Oxidative homocoupling of chiral 3-(arylacetyl)-2-oxazolidones 1 was achieved by treatment with DABCO-TiCl4 or DMAP-TiCl4 and afforded the corresponding dimers stereospecifically. The reaction of (4S)- and (4R)-substituted 1 gave (S,S)- and (R,R)-dimers respectively. The obtained dimers were easily transformed to the corresponding 2,3-diaryl succinic acids. This reaction therefore provides a useful
通过用DABCO-TiCl 4或DMAP-TiCl 4处理,实现手性3-(芳基乙酰基)-2-恶唑烷酮1的氧化均偶联,并立体定向提供相应的二聚体。(4S)-和(4R)-取代的1的反应得到(S,S)-和(R,R)-二聚体。获得的二聚体容易转化为相应的2,3-二芳基琥珀酸。因此,该反应提供了用于合成光学纯的2,3-二芳基琥珀酸的有用方法。芳基上的给电子基团的对位取代不会抑制氧化偶合。然而,对位取代的吸电子基团和邻位取代基阻碍了偶联。