کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1339016 | 979688 | 2006 | 6 صفحه PDF | دانلود رایگان |
The reaction of bis-thiourea o-C6H4[NHC(S)NHP(S)(Oi-Pr)2]2 (1) with iodine, KOH and ClCH2C(O)OCH3 leads to O,O′-diisopropyl-1,3-dihydro-2H-benzimidazol-2-ylideneamidothiophosphate (2) formation. The complex of the potassium salt of compound 2 with 18-crown-6, having the composition [K(18-crown-6)L], has been synthesized. Bis-thiourea [CH2NHC(S)NHP(S)(Oi-Pr)2]2 (6) forms a stable potassium salt, which oxidation by iodine leads to a product of heterocyclization, O,O′-diisopropyl-(1-{[(diisopropoxyphosphorothio)amino]carbonothioyl}imidazolidine-2-ylidene)amidothiophosphate (8), in which one of the thiourea fragments is kept.
N-Thiophosphorylated thioureas are of interest as complexing agents and precursors for the synthesis of heterocycles containing exocyclic phosphorylic groups. Thus a number of reactions with their participation, leading to phosphor-containing iminothiazolidines, iminooxazolidines and thiophosphoryl(phosphonyl)aminothiozoles formation have been reported. With the presence of two thiourea fragments occupying α,β positions in a molecule, it is reasonable to expect interesting transformations leading to cyclic structures.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 25, Issue 18, 25 December 2006, Pages 3611–3616