Synthesis of bicyclic dioxetanes bearing a 2-hydroxy-1,1′-binaphthyl-5-yl moiety active toward intramolecular charge-transfer-induced chemiluminescent decomposition
作者:Naoyuki Hoshiya、Nobuko Watanabe、Hisako K. Ijuin、Masakatsu Matsumoto
DOI:10.1016/j.tet.2006.09.108
日期:2006.12
Five pairs of diastereoisomeric dioxetanes, cis- and trans-2a-2e, were synthesized. These dioxetanes underwent intramolecular charge-transfer-induced decomposition with accompanying emission of orange light in TBAF in DMSO (system A) as a complete homoge of neous system and in [K subset of (18C6)](+)t-BuO- in PhH-THF (system B) as a sterically anisotropic environment. Maximum wavelength (lambda(CTICL)(max)) chemiluminescence did not vary practically with the triggering system. The lambda(CTICL)(max) was little affected also by substituents on the upper-Nap of dioxetanes 2, nor by the difference in their stereochemistry, namely, cis- or trans-isomer. On the other hand, chemiluminescent efficiency was found to split up depending on stereochemistry of 2. Dioxetane 2b bearing a methoxycarbonyl group on the upper-Nap gave significantly weak light, while its free carboxylic acid analog 2c afforded light effectively. (c) 2006 Elsevier Ltd. All rights reserved.