申请人:THE DOW CHEMICAL COMPANY
公开号:EP0254052A1
公开(公告)日:1988-01-27
Novel 2,3-bis((poly)chloromethyl)pyridines and 3,6-dichloro-2-(polychloromethyl)pyridines were obtained by vapor phase chlorination of 2,3-lutidine. Chlorination at about 350°C using a l4.4 sec. residence time and a chlorine to 2,3-lutidine mole ratio of about 6.8, for example, produced 2-(chloromethyl)-3-(dichloromethyl)pyridine, 3-(chloromethyl)-2-(dichloromethyl)pyridine, 2,3-bis(dichloromethyl)pyridine, 6-chloro-2,3-bis(dichloromethyl)pyridine, 3-(dichloromethyl)-2-(trichloromethyl)pyridine, 6-chloro-3-(dichloromethyl)-2-(trichloromethyl)pyridine, 6-chloro-2-(dichloromethyl)-3-(trichloromethyl)pyridine, and 3,6-dichloro-2-(trichloromethyl)pyridine. The compounds are useful as starting materials for herbicides and pharmaceutical agents.
通过对 2,3-丁啶进行气相氯化,获得了新型 2,3-双((多氯甲基))吡啶和 3,6-二氯-2-(多氯甲基)吡啶。氯化温度约为 350°C,停留时间为 14.4 秒,氯与 2,3-丁啶的摩尔比约为 6.例如,在约 350°C 的温度下进行氯化,停留时间为 l4.4 秒,氯与 2,3-丁啶的摩尔比约为 6.5:8,可制得 2-(氯甲基)-3-(二氯甲基)吡啶、3-(氯甲基)-2-(二氯甲基)吡啶、2,3-双(二氯甲基)吡啶、6-氯-2,3-双(二氯甲基)吡啶、3-(二氯甲基)-2-(三氯甲基)吡啶、6-氯-3-(二氯甲基)-2-(三氯甲基)吡啶、6-氯-2-(二氯甲基)-3-(三氯甲基)吡啶和 3,6-二氯-2-(三氯甲基)吡啶。这些化合物可用作除草剂和药剂的起始原料。