Aldol reaction at the α′ position of 4-alkenyl cyclopentenone was investigated briefly in order to develop a synthesis of the target molecule. The efficient reaction conditions we found (LDA at −78°C in THF) were applied to the reaction between the cyclopentenone possessing the ω-chain and the α-chain aldehyde to afford the anti and syn aldols in 73 and 15% yields, respectively. Mesylation of the anti
为了开发目标分子的合成,简要研究了在4-烯基
环戊烯酮的α'位置的醛醇缩合反应。我们发现有效的反应条件(
LDA在-78℃下在THF中)被施加到具有
环戊烯酮的ω链和α链醛,得到之间的反应的抗和顺式在73分15%的收率醛醇,分别。甲羟烷基化的抗羟醛,然后消除
甲磺酰氧基和C(15)的TBS氧基的甲
硅烷基化提供了标题分子,它也是由顺式羟醛以高收率生产的。