1,3,5-三噻吩基-1,5-戊二酮的合成及结构表征  

Synthesis and Structural Characterization of 1,3,5-Tris(thiophen-2-yl)Pentane-1,5-Dione

作　　者：陈兴玲 韦清 龙江泉 陶泽敬 马碧浪 刘意 CHEN Xingling;WEI Qing;LONG Jiangquan;TAO Zejing;MA Bilang;LIU Yi(School of Chemistry and Materials Science,Guizhou Education University,Guiyang 550018,China)

机构地区：[1]贵州师范学院化学与材料学院,贵州贵阳550018

出　　处：《化工技术与开发》2021年第5期34-36,共3页Technology & Development of Chemical Industry

摘　　要：以2-乙酰噻吩和噻吩-2-甲醛为原料,氢氧化钠为催化剂,乙醇/水为溶剂,经一步反应合成了1,3,5-三噻吩基-1,5-戊二酮,其结构经^(1)H-NMR、FTIR、熔点和LC-MS表征,并分析了该化合物的紫外可见光吸收性能。结果表明,1,3,5-三噻吩基-1,5-戊二酮对紫外光的吸收较强,在二氯甲烷中,其最大吸收波长λ_(max)=261nm,摩尔消光系数ε=2.13×10^(3) L·mol·cm^(-1),对可见光的吸收较弱,可归因于该化合物缺乏大的共轭体系。1,3,5-Tris(thiophen-2-yl)pentane-1,5-dione was synthesized by single-step reaction of 2-acetylthiophene and thiophen-2-carbaldehyde in ethanol-water mixture applied NaOH as catalyst.The structures of product was characterized by ^(1)H-NMR,FTIR,melting point,LC-MS,and UV-vis spectroscopy.The UV-vis spectra results indicated that 1,3,5-tris(thiophen-2-yl)pentane-1,5-dione exhibited a strong absorbance in the UV region of 250~300 nm in CH2Cl2 solution,λ_(max)=261 nm,ε=2.13×10^(3)L·mol/cm,and had no absorbance in the visible region.This was mainly due to the absence of conjugation in the compound.

关 键 词：1 5-戊二酮 噻吩 结构表征 

分 类 号：O625.4[理学—有机化学]