Journal
TETRAHEDRON
Volume 68, Issue 34, Pages 6873-6880Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2012.06.019
Keywords
Electrocyclization; Photochemistry; Thiophenes; o-Divinylbenzenes
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Funding
- Ministry of Science, Education and Sports of the Republic of Croatia [125-0982933-2926, 098-0982929-2917, 098-1191344-2943]
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The photochemical behaviour of 2,2'-(o-phenylenedivinylene)dithiophenes (7a-c), 3,3'-(o-phenylenedivinylene)dithiophene (8a) and 3,3'-(o-phenylenedivinylene)dibenzothiophene (8b) was studied under the low concentrations. An intramolecular reaction via the 2,3-dihydronaphthalene intermediate has been observed in all studied examples accompanied by dimerization and polymerization. The 1,2-dihydro-2,3-dithienylnaphthalenes (9a-c) were isolated (7-9%) from the 2-thiophene derivatives while the 3-thiophene derivatives gave polycyclic structures (13-44% yield). (C) 2012 Elsevier Ltd. All rights reserved.
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