公开(公告)号：EP0268322A1

公开(公告)日：1988-05-25

申请号：EP87202147.2

申请日：1987-11-05

Applicant: STAUFFER CHEMICAL COMPANY

Inventor： Kachhy, Avinash ,  Barda, Henry James

IPC: C07C69/76 ,  C07C67/307 ,  C07C63/70 ,  C07C51/363 ,  C07B39/00

CPC classification number: C07C69/78

Abstract: A process for photochlorinating aromatic compounds in the side chain and, in particular, a process for the selective chlorination of a 2-alkyl group of 2-alkyl benzoic acid or ester is disclosed. In this process, hydrogen chloride is added to the benzoic acid or ester prior to adding chlorine in the presence of actinic radiation at a reaction temperature below the decomposition temperature of the resulting chlorinated acid or ester. A typical aromatic compound is methyl 2-methylbenzoate and the reaction is preferably carried out at a temperature ranging from about -20°C to 20°C.

Abstract translation: 公开了侧链中芳族化合物的光氯化方法，特别是选择性氯化2-烷基苯甲酸或酯的方法。 在此过程中，在反应温度低于所得氯代酸或酯的分解温度的反应温度下，在光化学辐射存在下加氯之前，将氯化氢加入到苯甲酸或酯中。 典型的芳族化合物是2-甲基苯甲酸甲酯，反应优选在约-20℃至20℃的温度下进行。