Phosphorylation of 2-(3-methyl-1,3-diazabuten-1-yl)-3-ethoxycarbonylthiophenes with phosphorus(III) halides
作者:Alexandr M. Pinchuk、Svetlana A. Kovalyova、Sergey P. Ivonin、Anatoliy S. Merkulov、Tamara N. Kudrya、Alexandra A. Chaikovskaya、Andrey A. Tolmachev
DOI:10.1002/hc.10002
日期:——
2-(3-Methyl-1,3-diazabuten-1-yl)-3-ethoxycarbonylthiophenes are phosphorylated with phosphorus(III) halides in basic media at position 5 of the thiophene ring. Up to three heteroaromatic substituents can be introduced one by one at the same phosphorus atom. On this basis, mono-, bis-, and trishetaryl substituted P(III) and P(V) derivatives have been obtained. Phosphorylated 2-(N,N-dimethylformamidino)-3-ethoxycarbonylthiophenes
Novel Heterocyclic System - 2,4,1-Benzoxazaphosphinine: Convenient Substrate for Synthesis of Derivatives of 2,4-Diaminophenylphosphonic Acid
作者:Alexei O. Pushechnikov、Dmitrii G. Krotko、Dmitrii M. Volochnyuk、Andrei A. Tolmachev
DOI:10.1055/s-2001-14584
日期:——
N-Acylanilides having electron-donating substituents attached at a proper position react with phosphorus (III) bromides forming the new heterocyclic system - 2,4,1-benzoxazaphosphinine. 1-Arylamino-2,4,1-benzoxazaphosphinines are hydrolyzed with cleavage of an oxazaphosphinine ring affording mixed amides of 2,4-diaminophenylphosphonic acid in high yield.