| 摘要 |
A process for preparing substituted phthalic anhydrides, e.g. 4-methylphthalic anhydride, in which the Diels-Alder addition product of a conjugated diene, e.g. isoprene, and maleic anhydride is reacted with sulfuryl chloride in the presence of pyridine and an optional solvent, e.g. chlorobenzene.
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