[CH3:1][C:2]1[CH:3]=[C:4]([C:20](Cl)=[O:21])[C:5]2[O:10][CH:9]([C:11]([Cl:14])([Cl:13])[Cl:12])[O:8][CH:7]([C:15]([Cl:18])([Cl:17])[Cl:16])[C:6]=2[CH:19]=1.[NH3:23]>C(O)C>[CH3:1][C:2]1[CH:3]=[C:4]([C:20]([NH2:23])=[O:21])[C:5]2[O:10][CH:9]([C:11]([Cl:14])([Cl:13])[Cl:12])[O:8][CH:7]([C:15]([Cl:18])([Cl:17])[Cl:16])[C:6]=2[CH:19]=1A mixture of 6-methyl-2,4-bis(trichloromethyl)benzo[1,3]dioxin-8-carbonyl chloride (2.0 g.) concentrated ammonia (10 ml.) and ethanol (10 ml.) was heated under reflux for 2 hours. A complete solution was not obtained, but the reaction mixture was cooled and filtered, and the solid product was washed with ethanol and dried, to give 6-methyl-2,4-bis(trichloromethyl)benzo[1,3]dioxin-8-carboxamide, m.p. 281°-283° C.
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