An aldehyde (R.sup.1 CHO) and optically active 3-hydroxybutyric acid (CH.sub.3 CH(OH)CH.sub.2 COOH) are reacted to form an optically active dioxanone. This dioxanone is reacted with a compound R.sup.2 --X to form an intermediate (R.sup.1 R.sup.2 CHOCH(CH.sub.3) CH.sub.2 COOH) which is then subjected to elimination to form an optically active secondary alcohol (R.sup.1 R.sup.2 CHOH) in good yield and purity.
一个醛(R.sup.1 CHO)和具有光学活性的3-羟基
丁酸(CH.sub.3 CH(OH)CH.sub.2 COOH)反应形成一个具有光学活性的二氧杂环酮。这个二氧杂环酮与化合物R.sup.2--X反应,形成一个中间体(R.sup.1 R.sup.2 CHOCH(CH.sub.3) CH.sub.2 COOH),然后经过消除反应形成一个产率高且纯度好的具有光学活性的二级醇(R.sup.1 R.sup.2 CHOH)。