Add time:09/30/2019         Source:infona.pl

Heteropolycyclic diquinolones; benzo[1,2-b:4,5-b ]dithieno[2 ,3 -c :2 ,3 -c ]-5,13-N,N -dimethyldiq uinoline-6,14-dione and dithieno[3,2-b:2 ,3 -d]thienyl[2 ,3 -c:2 ,3 -c ]-5,10-N,N-dimethyldiq uinoline-6,9-dione are prepared by twofold photochemical dehydrohalogenation reaction of corresponding benzodithiophene- and dithienothiophenedicarboxanilides; 3,7-dichloro-N,N -dimethylbenzo[1,2-b;4,5-b ]dithiophene-2,6-dicarboxanili de and 3,5-dichloro-N,N -dimethyldithieno[3,2-b:2 ,3 -d]thiophene-2,6-dicarboxan ilide. The products of onefold photochemical dehydrohalogenation reaction, anilidoquinolones; 9-chloro-10-N -methylanilidobenzo[1,2-b:4,5-b ]dithieno[2,3-c ]-5-N-methy lquinolin-6-one and 10-chloro-9-N -methylanilidodithieno[3,2-b:2 ,3 -d]thienyl[2 ,3 -c ]-5 -N-methylquinolin-6-one were also isolated to prove the mechanism of the reaction.

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