PROCESS FOR THE PRODUCTION OF 2,6-DICHLORO-3,5-DI(SECONDARY OR TERTIARY ALKYL)TOLUENE
申请人:KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0837048A1
公开(公告)日:1998-04-22
This invention relates to an improved process for producing 2,6-dichloro-3,5-di(secondary or tertiary alkyl)toluene represented by the following formula (I). The process comprises chlorinating 3,5-di(secondary and tertiary alkyl)toluene represented by the following formula (II) by reacting with a chlorinating agent in the presence of a Lewis acid together with an aromatic sulfur compound represented by the formula (III) as a promoter:
Ar1 -(S)n -Ar2 (III)
wherein R1 and R2 are independently a secondary alkyl or tertiary alkyl group, Ar1 and Ar2 are independently an unsubstituted or substituted aromatic ring, and n is 1 or 2.
本发明涉及一种生产下式(I)代表的2,6-二氯-3,5-二(仲或叔烷基)甲苯的改进工艺。该工艺包括在路易斯酸和作为促进剂的式 (III) 所代表的芳香族硫化合物存在下,通过与氯化剂反应,氯化下式 (II) 所代表的 3,5-二(仲烷基和叔烷基)甲苯:
Ar1 -(S)n -Ar2 (III)
其中 R1 和 R2 独立地为仲烷基或叔烷基,Ar1 和 Ar2 独立地为未取代或取代的芳香环,n 为 1 或 2。