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The last step of this method, the cyclodehydration 5\u2010aryl\u20103\u2010hydroxy\u20101\u2010(2\u2010hydroxyaryl)\u20102,4\u2010pentadien\u20101\u2010ones <jats:bold>2a<\/jats:bold>\u2212<jats:bold>i<\/jats:bold>, was carried out with a catalytic amount of iodine, or <jats:italic>p<\/jats:italic>\u2010toluenesulfonic acid, in DMSO. Benzyloxy\u20103\u2010cinnamoyl\u20102\u2010styrylchromones <jats:bold>4a<\/jats:bold>\u2212<jats:bold>f<\/jats:bold> were obtained as by\u2010products in both procedures, but the latter procedure gave benzyloxy\u20102\u2010styrylchromones <jats:bold>3a<\/jats:bold>\u2212<jats:bold>i<\/jats:bold> in better yields. The structures of all new compounds were established by extensive NMR studies. (\u00a9 Wiley\u2010VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2003)<\/jats:p>","DOI":"10.1002\/ejoc.200300468","type":"journal-article","created":{"date-parts":[[2003,11,20]],"date-time":"2003-11-20T13:12:47Z","timestamp":1069333967000},"page":"4575-4585","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":43,"title":["Synthesis of New Hydroxy\u20102\u2010styrylchromones"],"prefix":"10.1002","volume":"2003","author":[{"given":"Clementina\u00a0M.\u00a0M.","family":"Santos","sequence":"first","affiliation":[]},{"given":"Artur\u00a0M.\u00a0S.","family":"Silva","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9\u00a0A.\u00a0S.","family":"Cavaleiro","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2003,11,19]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"The Flavonoids(Eds.: J. B. Harborne T. J. Mabry H. 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