1-炔基和1-烯基-3-芳基咪唑并[1,5- a ]吡啶:合成,光物理性质以及荧光波长和Hammett取代基常数之间的线性相关性观察
摘要:
合成了1-炔基和1-烯基-3-芳基咪唑并[1,5- a ]吡啶。80°C下三乙胺中的3-芳基-1-碘咪唑并[1,5- a ]吡啶和各种末端炔与Pd(PPh 3)2 Cl 2(10 mol%)和CuI(10 mol%)的Sonogashira偶联持续12小时,以良好至优异的产率得到相应的1-烯基-3-芳基咪唑并[1,5- a ]吡啶。3-芳基-1-碘咪唑并[1,5- a ]吡啶与各种苯乙烯衍生物的Mizoroki-Heck反应在Pd(OAc)2(5 mol%),IMes·HCl(10 mol%)和Cs下顺利进行2一氧化碳3(2当量)在DMA中于130°C放置20 h,以中等至高收率得到烯基化的咪唑并[1,5- a ]吡啶。所述炔基化产物的荧光最大值和荧光量子产率分别为458-560纳米和Φ ˚F = 0.08-0.26的氯仿溶液中,并且那些链烯基的咪唑并吡啶的是479-537纳米,Φ ˚F =
1-Alkynyl- and 1-Alkenyl-3-arylimidazo[1,5-<i>a</i>]pyridines: Synthesis, Photophysical Properties, and Observation of a Linear Correlation between the Fluorescent Wavelength and Hammett Substituent Constants
5-a]pyridines showed a good fit to the values predicted by TDDFT calculations at the B3LYP/6-311++G(d,p) level. In addition, the alkynylated imidazo[1,5-a]pyridines obtained showed linearcorrelations between the Hammett substituent constants of the substituents on the arylalkynyl group and their fluorescence wavelengths.
合成了1-炔基和1-烯基-3-芳基咪唑并[1,5- a ]吡啶。80°C下三乙胺中的3-芳基-1-碘咪唑并[1,5- a ]吡啶和各种末端炔与Pd(PPh 3)2 Cl 2(10 mol%)和CuI(10 mol%)的Sonogashira偶联持续12小时,以良好至优异的产率得到相应的1-烯基-3-芳基咪唑并[1,5- a ]吡啶。3-芳基-1-碘咪唑并[1,5- a ]吡啶与各种苯乙烯衍生物的Mizoroki-Heck反应在Pd(OAc)2(5 mol%),IMes·HCl(10 mol%)和Cs下顺利进行2一氧化碳3(2当量)在DMA中于130°C放置20 h,以中等至高收率得到烯基化的咪唑并[1,5- a ]吡啶。所述炔基化产物的荧光最大值和荧光量子产率分别为458-560纳米和Φ ˚F = 0.08-0.26的氯仿溶液中,并且那些链烯基的咪唑并吡啶的是479-537纳米,Φ ˚F =