ࡱ>  "q` bjbjqPqP 4,::XllllDB! ! ! uwwwwww$PhB-! |! ! ! ! vRu! u" ९2lY0g"! ! ! ! ! ! ! ! ! ! ! ! ! ! dll SINTEZA I FOTOKEMIJA STIRILNIH DERIVATA 4,5-DIARIL-OKSAZOLA SYNTHESIS AND PHOTOCHEMISTRY OF 4,5-DIARYL-STYRYL-OXAZOLES I. Kranj ec1, }. Marini2, M.`indler-Kulyk 1)Zavod za organsku kemiju, Fakultet kemijskog in~enjerstva i tenologije, Sveu iliate u Zagrebu, Maruliev Trg 19, 10 000 Zagreb, Hrvatska 2)NMR Centar, Institut Ruer Boakovi, Bijeni ka cesta 54, Zagreb, Hrvatska Kemija heterocikla smatra se jednom od najkompleksnijih grana organske kemije [1]. Oksazoli su petero lani aromatski spojevi sa dva heteroatoma, kisikom i duaikom, pojavljuju se u velikom broju u prirodi prisutnih spojeva [2] i zanimljivi su zbog visoke bioloake aktivnosti [3].  EMBED ChemDraw.Document.6.0  Novi, 4,5-diaril-2[2-(2-vinilfenil)etenil]oksazoli sintetizirani su u svrhu istra~ivanja njihovih intramolekularnih reakcija cikloadicija uz koriatenje svjetla kao reagensa. Spojevi su prireeni nizom reakcija, od zatvaranja heterociklo kog prstena do produ~enja konjugiranog sustava [4, 5], te osvjetljavani u kemijskom reakto6<Pdfvx    D H ïïtaMa9'h.ch1'CJH*OJQJaJmHsH'h.ch1'CJH*OJQJaJmHsH$h.ch1'CJOJQJaJmHsH'hth1'CJH*OJQJaJmHsH$hth1'CJOJQJaJmHsH'h\`h&5CJOJQJaJmHsH'h\`h D5CJOJQJaJmHsH'h\`h\`5CJOJQJaJmHsH'h\`h1'5CJOJQJaJmHsH'h\`h\SM5CJOJQJaJmHsHxD Z & r dfhjL& dgdv dgdx $da$gd)X $da$gd\` $da$gd>+ $da$gd1'$a$gd\SM H x |  H X Z ^ p t v  > ݶ𦖃s`P`hxCJOJQJaJmHsH$hAh`CJOJQJaJmHsHh]CJOJQJaJmHsH$h.chSYtCJOJQJaJmHsHh>+CJOJQJaJmHsHh`CJOJQJaJmHsH$h.ch.cCJOJQJaJmHsH'h.ch1'CJH*OJQJaJmHsH$h.ch1'CJOJQJaJmHsHhpCJOJQJaJmHsH  $ & ( * , . 0 j l n p r | }meaVNe>h\`CJOJQJaJmHsHjhAmUj܅L hAmUVh)Xjh)XUjhAmUmHnHtHu.jhAmCJOJQJUaJmHnHtHujhq.UmHnHtHu(jhOhq.UmHnHsH tHuh)XCJOJQJaJmHsHhtCJOJQJaJmHsH$hAh`CJOJQJaJmHsH$hAh.cCJOJQJaJmHsH| ~ $ (*ƺᮢᢖƇxl`S``Q`EhCJOJQJaJUh\`CJH*OJQJaJhnCJOJQJaJhmkCJOJQJaJh&Ph&PCJOJQJaJh\`h\`CJOJQJaJh)XCJOJQJaJhACJOJQJaJhCJOJQJaJh]CJOJQJaJhaOCJOJQJaJhAhACJOJQJaJh\`CJOJQJaJ$hAhxCJOJQJaJmHsHru. Dobiveni su novi, zanimljivi heterocikli ki derivati koji su okarakteriztirani modernim spektroskopskim metodama. Produkti i mehanizmi njihova nastajanja bit e diskutirani. [1] A.Katrizky, C. Rees, Comprehensive oxazole and bis-oxazole heterocyclic chemistry, 1984, Volume 6, 177 - 234 [2] Vince S.C. Yeh, Tetrahedron, 2004, 60, 11995 - 12042 [3] P. Wipf, Chemical Review, 1995, 95, 2115  2134 [4] W. Pei, S. Li, X. Nie, J. Pei, B. Chen, J. Wu, X. Ye, Synthesis, 1998, 1298  1304 [5] M. `indler-Kulyk, D.Vojnovi, N. Defterderovi, }. Marini, D. 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