441312-27-2Relevant academic research and scientific papers
C-phosphorylation of 1,2,4-triazoles with phosphorus(III) halides. Synthesis of 4,5-dihydrobenzo[e][1,2,4]triazolo[5,1-c] [1,4,2] diazaphosphinine derivatives
Zarudnitskii, Evgenij V.,Ivanov, Vladimir V.,Yurchenko, Alexandr A.,Pinchuk, Alexandr M.,Tolmachev, Andrej A.
, p. 146 - 152 (2007/10/03)
Phosphorylation of 4- and 1-substituted 1,2,4-triazoles with PCl3, PhPCl2, Ph2PCl, and (Et2N)2 PCl was carried out. A novel phosphorus-containing condensed heterocyclic system (18, 23) was constructed by the reactions of 2-(1H-1,2,4-triazol-1-yl)1-(4-chlorophenylcarboxamido)-5-trifluoromethylbenzene with PBr3 and PhPBr2. Treatment of the bromophosphonite 18 with an excess of morpholine in the presence of sulfur resulted in a diazaphosphinine ring opening and provided functionalized 1H-1,2,4-triazol-5-ylphosphonic acid derivatives 21 and 22.
