申请人:DAISO CO., LTD.
公开号:EP2325178A1
公开(公告)日:2011-05-25
2-Aryl-2-halomethyl-4-chloromethyl-1,3-dioxolane (A) is produced with ease without decreasing the optical purity, by reacting optically active monochlorohydrin and aryl(halomethyl)ketone as starting materials in an acid catalyst. Furthermore, optically active (2-aryl-2-halomethyl-1,3-dioxolan-4-yl)methyl carboxylate and optically active (2-aryl-2-halomethyl-1,3-dioxolan-4-yl)methyl sulfonate, which are useful intermediates for ketoconazole, are efficiently produced from the obtained optically active form (A).
In addition, optically active trans-(2-aryl-2-halomethyl-1,3-dioxolan-4-yl)methyl carboxylate is isomerized to a cis form thereof in the presence of an acid catalyst.
2- 芳基-2-卤甲基-4-氯甲基-1,3-二氧戊环(A)是以具有光学活性的一氯海德林和芳基(卤甲基)酮为起始原料,在酸催化剂作用下进行反应,在不降低光学纯度的情况下轻松制得的。此外,光学活性的(2-芳基-2-卤甲基-1,3-二氧戊环-4-基)甲基羧酸酯和光学活性的(2-芳基-2-卤甲基-1,3-二氧戊环-4-基)甲基磺酸酯是酮康唑的有用中间体,可从获得的光学活性形式(A)中有效地生产出来。
此外,光学活性反式-(2-芳基-2-醛甲基-1,3-二氧戊环-4-基)甲基羧酸酯在酸催化剂存在下异构化为顺式形式。