Functionalized Naphthalenes by Benzotriazole-Mediated Annulation
摘要:
The anions of 3-benzotriazolylphthalide (1) and of 2-(benzotriazolylmethyl)benzonitrile (6) condense regioselectively with a range of Michael accepters to form 1,4-dihydroxynaphthalenes 4b-f and 1-amino-2,3-di(methoxycarbonyl)naphthalene (9) in moderate to good yields.
Fluorescence properties of amido-substituted 2,3-naphthalimides: Excited-state intramolecular proton transfer (ESIPT) fluorescence and responses to Ca2+ ions
were prepared and their intramolecular excited state protontransfer (ESIPT) fluorescence and responses to metal ions were investigated. Compound 3a displayed normal fluorescence in the amide form in toluene and MeCN and no response to metal cations in the corresponding amidate ion form. In contrast, compound 3b gave off dual emission assignable to normal and ESIPTfluorescence. Additionally, the amidate