Enantioselective Synthesis of Both Enantiomers of a Isoproterenol Analogue and of Di-<i>O</i>-pivaloylepinephrine
作者:Arlette Solladié-Cavallo、Marie-Claude Simon-Wermeister、Dariouch Farkhani
DOI:10.1002/hlca.19910740216
日期:1991.3.13
An asymmetric synthesis of the analogue 4a of isoproterenol and of di-o-pyvaloylepinephrine 3 which provides both enantiomers in optically pure state is reported. The key step of the method is the highly diastereo-selective reduction (using DIBAL or DIBAL/ZnCl2) of a β-ketosulfoxide 7 which leads, as desired, to the (S)- or the (R)-configuration at C(1) (Schemes 4 and 5).
模拟的不对称合成4A异丙肾上腺素和二- ö -pyvaloylepinephrine 3报道,其提供以光学纯态对映体。该方法的关键步骤是(使用DIBAL或DIBAL /氯化锌的高度非对映选择性还原2)β-ketosulfoxide的7其中引线,根据需要,向(小号) -或(- [R )中C -构型( 1)(方案4和5)。