Structure and Biological Activities of 2-(1,3-Dithiolan-2-ylidene)-1-phenyl-2-(1,2,4-triazol-1-yl)ethanone

In order to find leading compounds with an excellent fungicidal activity, the title compound 2-（ 1,3-dithiolan-2- yl-idene）-1-phenyl-2-（ 1,2,4-tfiazol-1-yl） ethanone was synthesized according to the biological isosterism and its structure was confirmed by means of IR, MS, ^1 H NMR and elemental analysis. The single crystal structure of the title compound was determined by X-ray diffraction. The preliminary biological test shows that the synthesized compound exhibits some biological activities.

UPLC-Q/TOF法同时定性定量分析滇芹药材中主要化学成分

目的建立UPLC-Q/TOF法同时定性、定量分析滇芹中主要化学成分。方法采用超高效液相色谱串联飞行时间质谱法进行分析,色谱柱为Agilent Poroshell 120 Hilic,流动相为乙腈-0.1%甲酸水溶液,梯度洗脱,体积流量0.3 m L/min;定性、定量采用Q-TOF正负离子全扫描+IDA(信息关联采集)模式。结果利用已建立的筛查数据库将满足质量误差小于5×10-6、同位素分布正确且含有二级碎片的离子作为分析目标化合物,结合软件Formula Finder、Mass Calculators等功能、在线数据库(Human Metabolome Database、Pub Chem、Chemical Book等)及二级碎片裂解规律,共鉴定出23个化合物,滇芹首次发现4个化合物。确定阿魏酸为定量分析指标性成分,其定量、定性离子分别为178和149;阿魏酸检测质量浓度线性范围为1.14~1 140 ng/m L(r=1.000),检测限、定量限分别为0.87、2.91 ng/m L,精密度、稳定性、重复性试验的RSD<2%,加样回收率为98.13%~101.25%(RSD=1.37%,n=5)。结论该方法灵敏度高、重现性好,分析快速、准确、可靠,可用于同时定性、定量检测滇芹药材中主要化学成分;云南滇芹中阿魏酸含量要高于西藏滇芹。