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Flavylium salts with alkyl side chains in positions 3 or 4\u2032 were isolated from reactions between 2,4\u2010dihydroxybenzaldehyde and decanophenone, dodecanophenone and 4\u2032\u2010hexyl\u2010 or 4\u2032\u2010dodecylacetophenone. Flavylium salts with alkyl side chains in positions 5 or 6 were prepared through reactions between benzoylacetone and 4\u2010hexyl\u2010, 4\u2010dodecyl\u2010 or 5\u2010pentylresorcinol. The new compounds are insoluble or sparingly soluble in water, but readily incorporate into aqueous dispersions of anionic (SDS), cationic (CTAB) or neutral (C<jats:sub>12<\/jats:sub>E<jats:sub>10<\/jats:sub>) surfactants above their critical micellar concentrations. They also present interesting spectroscopic properties \u2212 namely, ultra\u2010fast proton transfer in the excited state \u2212 and the 4\u2032 derivatives also exhibit photochromic behaviour, which might have several applications in the field of self\u2010assembled systems. (\u00a9 Wiley\u2010VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2004)<\/jats:p>","DOI":"10.1002\/ejoc.200400318","type":"journal-article","created":{"date-parts":[[2004,11,15]],"date-time":"2004-11-15T10:51:06Z","timestamp":1100515866000},"page":"4877-4883","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["One\u2010Step Synthesis of Novel Flavylium Salts Containing Alkyl Side Chains in Their 3\u2010, 4\u2032\u2010, 5\u2010 or 6\u2010Positions and Their Photophysical Properties in Micellar Media"],"prefix":"10.1002","volume":"2004","author":[{"given":"Ana\u00a0C.","family":"Fernandes","sequence":"first","affiliation":[]},{"given":"Carlos\u00a0C.","family":"Rom\u00e3o","sequence":"additional","affiliation":[]},{"given":"Carla\u00a0P.","family":"Rosa","sequence":"additional","affiliation":[]},{"given":"Vera\u00a0P.","family":"Vieira","sequence":"additional","affiliation":[]},{"given":"Ant\u00f3nio","family":"Lopes","sequence":"additional","affiliation":[]},{"given":"Palmira\u00a0F.","family":"Silva","sequence":"additional","affiliation":[]},{"given":"Ant\u00f3nio\u00a0L.","family":"Ma\u00e7anita","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2004,11,15]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.199100171"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0040-4020(01)91542-X"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-5173(02)00246-6"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/1010-6030(94)04018-W"},{"key":"e_1_2_6_5_2","unstructured":"S. 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