申请人:NIPPON SODA CO., LTD.
公开号:EP0134245A1
公开(公告)日:1985-03-20
A novel process for preparing 3-chloro-1-formyl-4-phenylpyrroles represented by the following formula (I) useful as agricultural and horticultural germicides, using 3-phenyl-2,2,4-trichlorobutanols represented by the formula (IV) as starting materials according to the following reaction wherein X represents the same or different substituent(s) selected from the group consisting of halogen, nitro, and trifluoromethyl groups, and n represents 0,1 or 2. This process enables to greatly shorten the preparation steps and improve the yield by employing novel pyrroline derivatives represented by the general formula (III).
一种制备下式(I)所代表的 3-氯-1-甲酰基-4-苯基吡咯的新工艺,该工艺使用下式(IV)所代表的 3-苯基-2,2,4-三氯丁醇作为起始原料,按照以下反应制备,其中 X 代表相同或不同的取代基,这些取代基选自由卤素、硝基和三氟甲基组成的组,n 代表 0、1 或 2。 通过使用通式 (III) 所代表的新型吡咯啉衍生物,该工艺可大大缩短制备步骤并提高产率。