A novel monoester of cis-cyclopentenediol of the following formula ##STR1## wherein ##STR2## is an optically active acyl moiety. The monoester can be prepared by reacting cis-2-cyclopentene-1,4-diol with an optically active carboxylic acid of the following formula ##STR3## wherein ##STR4## is the same as defined above, or its reactive derivative, and separating the resulting reaction product into the two individual diastereomers. Lactones can be prepared from the monoesters selectively and with commercial advantage.
以下是中文翻译:一种新的单酯化合物,其
化学式如下所示:其中##STR2##为光学活性酰基。该单酯化合物可通过将顺式-2-
环戊烯-1,4
-二醇与以下
化学式的光学活性
羧酸反应制备而成:其中##STR4##与上述定义相同,或其反应衍
生物,并将产生的反应产物分离成两个单独的对映体。从这些单酯化合物可以有选择性地且具有商业优势地制备内酯。