engleski

Synthesis and Photochemistry of beta-(3-substituted-2-furyl)-o-divinylbenzenes

A number of works [1] has been published about synthesis and photochemistry of the hexatriene system with a heterocyclic ring as a substituent. Thus, irradiation of furan derivative, 2-[2-(2-vinylphenyl)ethenyl]furan (1a), gave 9, 10-dihydro-4, 9-methano-4H-benzo[4, 5]cyclohepta[1, 2-b]furan (2a) in a very good yield. Contrary to these resultats, the 3-substituted furan derivatives 1 (b: R = CH3 ; c: R = Br ; d: R = vinyl) give mainly benzobicyclo[2.1.1]hexene derivatives 3b-d. The structure determination of the products and the reaction mechanism will be discussed.

furans; photochemistry

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