engleski

Photochemical and thermal transformations of thiophene o-distyrylbenzene analogues in acidic media

Intramolecular photochemical reactions of thiophene analogues of o-distyrylbenzene, 2, 2'- (o-phenylenedivinylene)dithiophenes (1a, b), 3, 3'-(o-phenylenedivinylene)dithiophene (2a) and 3, 3'-(o-phenylenedivinylene)dibenzothiophene (2b), were studied in acidic media at low concentrations. A 1, 6- and 1, 5-ring closure of hexatriene system leading to dihydronaphthalene or indene derivatives, respectively, was observed.

electrocyclization ; photochemistry ; protonation ; thiophenes ; o-divinylbenzenes

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