1,3-Bicyclo[1.1.1]pentanediyl: The Shortest Rigid Linear Connector of Phenylated Photochromic Units and a 1,5-Dimethoxy-9,10-di(phenylethynyl)anthracene Fluorophore
作者:Armin de Meijere、Ligang Zhao、Vladimir N. Belov、Mariano Bossi、Matthias Noltemeyer、Stefan W. Hell
DOI:10.1002/chem.200601316
日期:2007.3.16
3-(4-iodophenyl)bicyclo[1.1.1]pentane, prepared in 63 % yield by iodination of 1,3-diphenylbicyclo[1.1.1]pentane, was selectively mono-coupled with 9-ethynyl-1,5-dimethoxy-10-phenylethynylanthracene (26), and subsequently with the zinc derivatives of 1-(2-methyl/methoxy-4-methyl-5-phenylthiophen-3-yl)-2-(2-methyl/methoxy-4-methylt hiophen-3-yl)perfluorocyclopentenes (38-H-41-H). Regioselective synthesis of the
将过量的1,3-二苯基双环[1.1.1]戊烷碘化,以63%的收率制得的双1,3-(4-碘苯基)双环[1.1.1]戊烷与9-乙炔基-1,5-二甲氧基-10-苯基乙炔基蒽(26),随后带有1-(2-甲基/甲氧基-4-甲基-5-苯基噻吩-3-基)-2-(2-甲基)的锌衍生物/甲氧基-4-甲基噻吩-3-基)全氟环戊烯(38-H-41-H)。区域选择性合成2-未取代的噻吩38-H-41-H需要中间体制备2-三甲基甲硅烷基-3,5-二甲基-4-溴噻吩(37)或2-三甲基甲硅烷基-5-甲氧基-3-甲基-4-溴噻吩(40)。用2-三甲基甲硅烷基保护噻吩环的α-位可阻止4-硫代衍生物重排成相应的2-锂化的噻吩。与双环[1.1。1]戊烷片段连接光致变色单元1-3和1,5-二甲氧基-9,10-二(苯基乙炔基)蒽作为荧光部分,荧光团(供体)的激发态与封闭形式之间的定量共振能量转移观察到了光致变色单元1-3(受体)