The synthesis of a new enantiomerically pure diene, (S)-(+)-1 is reported. The absoluteconfiguration of 1 was determined by non-empirical analysis of its CD spectrum. The synthesis and resolution of the racemic β-diketone 4 into its constituent enantiomers by the SAMP–hydrazone method is described. The enantiopure β-diketone (S)-(+)-4 was then converted to diene (S)-(+)-1 by a two-stage reaction sequence
报道了新的对映体纯的二烯(S)-(+)- 1的合成。的绝对构型1是由它的CD光谱的非经验分析确定的。描述了通过SAMP-hydr方法将外消旋β-二酮4合成并拆分为其组成对映体。然后通过两步反应序列将对映体纯的β-二酮(S)-(+)- 4转化为二烯(S)-(+)- 1。还介绍了通过1 H和13 C NMR光谱对产物进行的结构分析。