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Org. Chem."],"accepted":{"date-parts":[[2023,8,2]]},"abstract":"<jats:p>\n                    A facile one-pot four-component synthetic methodology is evolved to construct novel copper(II) benzo[\n                    <jats:italic>f<\/jats:italic>\n                    ]chromeno[2,3-\n                    <jats:italic>h<\/jats:italic>\n                    ]quinoxalinoporphyrins in good yields via a sequential reaction of copper(II) 2,3-diamino-5,10,15,20-tetraarylporphyrins, 2-hydroxynaphthalene-1,4-dione, aromatic aldehydes, and dimedone in the presence of a catalytic amount of trichloroacetic acid in chloroform at 65 \u00b0C. Further, the newly prepared copper(II) porphyrins were transformed to the corresponding free base and zinc(II) benzo[\n                    <jats:italic>f<\/jats:italic>\n                    ]chromeno[2,3-\n                    <jats:italic>h<\/jats:italic>\n                    ]quinoxalinoporphyrins under standard demetallation and zinc insertion conditions. The absorption and emission properties of the obtained porphyrins were investigated by using UV\u2013visible and fluorescence spectroscopy. The preliminary photophysical results revealed a significant red-shift in their absorption and emission spectra as compared to the\n                    <jats:italic>meso<\/jats:italic>\n                    -tetrakis(4-methylphenyl)porphyrins due to the extended \u03c0-conjugation.\n                  <\/jats:p>","DOI":"10.3762\/bjoc.19.89","type":"journal-article","created":{"date-parts":[[2023,8,11]],"date-time":"2023-08-11T08:05:06Z","timestamp":1691741106000},"page":"1216-1224","source":"Crossref","is-referenced-by-count":8,"title":["Unravelling a trichloroacetic acid-catalyzed cascade access to benzo[\n                    <i>f<\/i>\n                    ]chromeno[2,3-\n                    <i>h<\/i>\n                    ]quinoxalinoporphyrins"],"prefix":"10.3762","volume":"19","author":[{"given":"Chandra 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