Synthesis of photochromic 2,3-bis(5-methyl-2-phenyl-4-thiazoly1)-1,4-naphthoquinone derivatives
Mahmut Kose, Cigdem Yildirim Sekerci, Kazushi Suzuki, Y Yokoyama
article (Uluslararası, Hakemli) | Yazar(lar): Mahmut Kose, Cigdem Yildirim Sekerci, Kazushi Suzuki, Y Yokoyama | Yıl: 2011 | Dergi/Kurum: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | İndeks: WOS.SCI | DOI: 10.1016/j.jphotochem.2011.01.016 | Anahtar Kelimeler: Photochromism, 2,3-Diaryl-1,4-naphthoquinone, Di
2,3-Bis(5-methyl-2-phenyl-4-thiazolyl)-1,4-naphthoquinone 1-O, its monoethylene acetal 2-O and methylated derivatives 3-O and 4-O were synthesized and their photochromic properties were investigated. While bisarylnaphthoquinone 1-O was nonphotochromic, its monoacetal 2-O and methylated derivatives 3-O and 4-O displayed good photochromism. Among them, the isomer 4-O recorded a remarkable diastereomeric excess (98.40%) with high conversion ratio (96.20%) upon UV irradiation. (C) 2011 Elsevier B.V. All rights reserved.