Various oxa-containing heterocycles (i.e. enantiopure epoxide- and oxetane-based substrates) were subjected to ring-opening with phosphorus nucleophiles. The ring-opening reactions proceeded smoothly and the resulting 1,2-, and 1,3-phosphino alcohols were efficiently isolated as stable borane complexes. These derivatives arise from regio- and stereocontrolled syntheses based on ring-opening processes of oxa-containing heterocycles. The regio- and stereochemistry of the resulting chiral products were unequivocally confirmed in many cases via single-crystal X-ray diffraction analysis.
各种含
氧杂环(即对映纯
环氧化物和
氧杂
环丁烷基底物)与
磷亲核剂进行了开环反应。开环反应顺利进行,生成的 1,2-和 1,3-膦醇以稳定的
硼烷络合物形式被有效地分离出来。这些衍
生物是基于含
氧杂环的开环过程进行区域和立体控制合成而得到的。在许多情况下,通过单晶 X 射线衍射分析,所得到的手性产物的区域和立体
化学结构都得到了明确的证实。