2-氨基-5-巯基-1,3,4-噻二唑席夫碱类衍生物的合成及抑菌活性

以三乙胺为溶剂,二硫化碳和氨基硫脲在78~80℃反应1.5 h,得到2-氨基-5-巯基-1,3,4-噻二唑,产率69%,再将其与取代苯甲醛反应,得到一系列的2-氨基-5-巯基-1,3,4-噻二唑席夫碱5a^5f,产率66%~83%,所得化合物结构经1HNMR、13CNMR、FT-IR和HRMS验证.生物活性测试表明,化合物5f对番茄灰霉病菌、油菜菌核病菌和大豆灰斑病菌的有较高的抑制作用.

苯甲酸酯类紫外吸收剂的合成及性能

设计并合成了5种取代苯甲酸(2-氧代环戊基)酯3a~3e。采用^(1)H NMR、^(13)C NMR、FT-IR和HRMS等分析手段对所合成的化合物结构进行了表征,考察了它们的紫外吸收特性及光稳定性。结果表明:化合物3a、3c、3d和3e对短波紫外线(UVC)具有较好的吸收性能,其中,化合物3d对UVC的摩尔吸光系数最高为21540 L·mol^(-1)·cm^(-1),4种化合物在此区域的光稳定顺序为:3c>3d>3e>3a;化合物3b、3c和3d具备中波紫外线UVB和长波紫外线UVA的吸收性能,化合物3c显示了较对照品更佳的吸收性能,其摩尔吸光系数最高为19600 L·mol^(-1)·cm^(-1),3种化合物在此区域的光稳定顺序为:3b>3c>3d。

Synthesis,Crystal Structure and Fe^(3+)Recognition of a Fluorescent Probe Based on Quinazolinone Derivative

A novel quinazolinone derivative ethyl 2-(2-methyl-4-oxo-1,2,3,4-tetrahydroquinazolin-2-yl)ace-tate(EMOTA)was synthesized and characterized by HRMS,^(1)H NMR,^(13)C NMR spectroscopy and X-ray crystal-lography,and the ion recognition performance of the compound was studied by fluorescence analysis measure-ments.The results showed that probe EMOTA has a rapid fluorescence response,good selectivity and sensitivity to Fe^(3+).When the concentration of Fe^(3+)was in the range of 0~10.0×10^(-5)mol/L,the fluorescence quenching could be affected by the probe,and the detection limit was 1.65×10^(-6)mol/L.In addition,the identification and detection of Fe^(3+)in water samples were studied,and the results showed that probe EMOTA has high efficiency,significant sen-sitivity and high selectivity on the recognition and detection of Fe^(3+)in water samples,which indicates probe EMOTA has a practical application prospect.