A thieno-2H-chromene alpha-amino acid derivative: synthesis and photochromic properties |
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Authors: | Queiroz Maria-João R P Abreu Ana S Ferreira Paula M T Oliveira M Manuel Dubest Roger Aubard Jean Samat André |
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Institution: | Departamento de Química, Universidade do Minho, Campus de Gualtar, Braga, Portugal. mjrpq@quimica.uminho.pt |
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Abstract: | structure: see text] A new photochromic thieno-2H-chromene alpha-amino acid derivative was prepared by C-N palladium-catalyzed cross-coupling of a bromothieno-2H-chromene with the aminated aromatic side chain of the methyl ester of a N,N-diprotected amino acid. Its good photochromic properties demonstrated by flash photolysis and continuous irradiation indicate a possible application in ophthalmic lenses. It may also be inserted into peptides to give photoinduced reversible structural changes. |
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