3,4-DICHLOROPHTHALIDE, PRODUCTION METHOD THEREOF AND PRODUCTION METHOD OF 3-CHLOROPHTHALOYL DICHLORIDE USING THE SAME

摘要

<P>PROBLEM TO BE SOLVED: To provide a new 3,4-dichlorophthalide and a production method thereof, and to convert the same into 3-chlorophthaloyl dichloride in high yield. Ž<P>SOLUTION: The 3,4-dichlorophthalide of formula (I) is produced by chlorination of 3-chloro ortho-xylene and hydrolysis. The 3,4-dichlorophthalide can be converted into 3-chlorophthaloyl dichloride in high yield through photochlorination. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž