Base-Induced Chemiluminescent Decomposition of Bicyclic Dioxetanes Bearing a (Benzothiazol-2-yl)-3-hydroxyphenyl Group: A Radiationless Pathway Leading to Marked Decline of Chemiluminescence Efficiency
作者:Masatoshi, Tanimura、Nobuko Watanabe、Hisako K. Ijuin、Masakatsu Matsumoto
DOI:10.1021/jo300417e
日期:2012.5.18
Charge-transfer-induced decomposition (CTID) of bicyclic dioxetanes 1b–d bearing a 3-hydroxylphenyl moiety substituted with a benzothiazol-2-yl group at the 2-, 6-, or 5-position was investigated, and their chemiluminescence properties were compared to each other, based on those for a 4-benzothiazolyl analogue 1a. Dioxetanes 1c and 1d underwent CTID to give the corresponding oxido anions of keto esters
研究了在2-,6-或5-位上带有被苯并噻唑-2-基取代的3-羟基苯基部分的双环二氧杂环丁烷1b - d的电荷转移诱导分解(CTID),其化学发光性质为根据4-苯并噻唑基类似物1a的结果进行比较。与1a的情况类似,对二氧环乙烷1c和1d进行CTID生成单线激发态的酮酸酯8c或8d的相应氧化阴离子。另一方面,尽管1b仅产生酮酸酯,但其化学发光效率很低。2b。1b化学发光效率的显着下降归因于1b主要通过无辐射途径分解为8b,其中苯并噻唑基中氮的分子内亲核攻击二氧杂环丁烷O-O产生环状中间体cis - 11。