Synthesis Of New Pyrazole Derivatives And Ring Disulfide Reduction Enone Acid Fluorescence Properties

As a sort of important intermediates in synthesis,α-oxoketene dithioacetals have been studied extensively and especially as 1,3-electrophiles form aroy and heterocyclic compounds . In order to study these intermediates ,professor Liu Qun has focused on the reactions on the α-carbon atom of keten dithioacetals .A lot of new compounds were synthesized, and some important reaction of α-oxoketene dithioacetals were developed as well.1-[1,3]Dithiolan-2-ylidene-1-arylpropan-2-one reacts with NH2NH2 to produce compounds of 2-[5-Methyl-4-aryl- 2H-pyrazol-3-ylsulfanyl]- ethyl(propy)disulfanyl-ethane. We investigated the conditions to prepare these compounds . And 2-[5-Methyl-4-aryl-2H-pyrazol-3-ylsulfanyl]- ethyl(propy)disulfanyl- ethane has potantial application in the area of pharmacy or dye.Moreover, sodium 5-(4-dimethylamino-phenyl)-2-[1,3]di(thio- lan\thian)-2-ylidene-3-oxo-pent- 4-enoic acid were prepared from 2-[1,3]di(thiolan\thian)- 2- ylidene - 3-oxo-butyric acid ethyl ester and characterized , the fluorescent property of these compounds were studied as well. They were found to be pH sensor with high quality. They can be used to detect some compounds such as CO2 of atmosphere...