There are provided an acetalsulfonate derivative useful as an intermediate for medicines and agricultural chemicals, a process for industrially producing the derivative, and a process for industrially producing a styrene oxide derivative from the acetalsulfonate derivative or from a mandelic acid derivative.
A process for producing an acetalsulfonate derivative which comprises a first step of esterifying a mandelic acid derivative to form a mandelic ester derivative, a second step of protecting the mandelic ester derivative by an acetal to form an acetal derivative, a third step of reducing the acetal derivative to form an ethanediol derivative and a fourth step of reacting the ethanediol derivative with a sulfonyl chloride derivative. A process for producing a styrene oxide derivative which comprises a deprotecting step of deacetalizing the acetalsulfonate derivative and a step of epoxidizing the sulfonate derivative obtained in the deprotecting step with the aid of a base catalyst.
                            本发明提供了一种可用作医药和农用
化学品中间体的
乙醛磺酸衍
生物、一种工业化生产该衍
生物的工艺,以及一种用
乙醛磺酸衍
生物或
扁桃酸衍
生物工业化生产
氧化苯乙烯衍
生物的工艺。
一种生产
乙醛磺酸衍
生物的工艺,包括第一步酯化
扁桃酸衍
生物以形成
扁桃酸酯衍
生物,第二步用
缩醛保护
扁桃酸酯衍
生物以形成
缩醛衍
生物,第三步还原
缩醛衍
生物以形成
乙二醇衍
生物,第四步使
乙二醇衍
生物与
磺酰氯衍
生物反应。一种生产
氧化苯乙烯衍
生物的工艺,该工艺包括使
乙醛磺酸衍
生物脱
乙醛的脱保护步骤和在碱催化剂的帮助下使脱保护步骤中得到的
磺酸衍
生物环氧化的步骤。