Synthesis of thiazolidines via regioselective addition of unsymmetric thioureas to maleic acid derivatives
作者:Alena S. Pankova、Mikhail A. Samartsev、Igor A. Shulgin、Pavel R. Golubev、Margarita S. Avdontceva、Mikhail A. Kuznetsov
DOI:10.1039/c4ra07840c
日期:——
The regioselectivity of the reaction between unsymmetric thioureas and maleic acid derivatives has been studied, and general regularities have been established.
未对称硫脲与马来酸衍生物之间反应的区域选择性已经被研究,并建立了一般规律。
Synthesis, Characterization and Structural Study of New Ethyl Thiourea Compounds and the Preliminary Naked-eye Sensors for Mercury and Argentum Metal Ions
Novel ethyl thiourea compounds 1a – 1f have been synthesized in good to high yields. The structure of all compounds was identified using FT-IR, 1H NMR, 13C NMR, and ESI-Mass. The compound 1-ethyl-3-(3-methoxyphenyl) thiourea 1d was obtained in crystalline form by recrystallization from DMSO. However, single crystal X-ray analysis revealed that the 1d molecule crystallized in a monoclinic crystal system with space group of P21/n and the unit cell dimensions are a = 11.0797(7) Å, b = 8.6081(6) Å, c = 11.9698(7) Å, α = 90°, β =104.543(2)°, γ = 90°, Z = 4 and V = 1105.04(12) Å3. The preliminary optical sensor properties for metal ions of 1a – 1f were investigated using naked-eye. The results determined that all compounds have the ability as naked eye sensors for mercury (Hg) and argentum (Ag) metal ions.