The reactivity of 1, 3, 2-diheterophospholans containing a tricoordinate phosphorus atom

The results of studies on the reactivity of 1, 3, 2-di-heterophosphacycloalkanes containing a tricoordinate phosphorus atom carried out in recent years are examined and surveyed. Much attention has been devoted to reactions leading to an increase of the coordination number of the ring phosphorus atom and also to exocyclic and endocyclic substitution reactions. The mechanisms and certain stereochemical characteristics of the reactions of cyclic phosphorus compounds are discussed. In a few instances the reactivities have been estimated quantitatively. © 1983 The British Library

Phosphorylated derivatives of salicylaldehyde azomethines

© 2016 Taylor & Francis Group, LLC.New phosphorylated azomethines on the basis of salicylaldehyde were obtained. These compounds react with P(Y) chlorides to form diphosphorylated azomethines

Reactions of Pyridoxal with Heterocycles Containing Primary Amino Group

© 2018, Pleiades Publishing, Ltd. New nitrogen-containing derivatives of pyridoxal were obtained as a result of its reaction with various amines. The reactions with amines bearing a heterocyclic fragment (pyridine, pyrimidine, quinoline, piperidine) furnished the final products stabilized in an aminoacetal form. The product prepared from 2-aminomethylpiperidine has an imidazolidine fragment in the molecule

New method for the synthesis of phosphonic and phosphinic esters and their thio analogs Communication 14. New method for the synthesis of amino phosphonic esters

A new method has been developed for the synthesis of amino phosphonics acids. It consists in the addition.of dialkylphosphorous acids to anils in presence of alkali-metal alkoxides. © 1953 Consultants Bureau

"Phosphonoethylation" and diene-synthesis reactions with vinylphosphonic esters

1. Dibutyl vinylphosphonate has been synthesized. 2. It has been shown that vinylphosphonic esters combine at the double bond with hydrogen sulfide and with mercaptans, yielding the corresponding dialkyl 2-mercaptoethylphosphonates and dialkyl 2 alkylmercaptoethylphosphonates respectively. 3. It has been shown that vinylphosphonic esters maybe used as dienophiles in diene-synthesis reactions. A method has been developed for the preparation of esters of homologs and derivatives of cyclohexenylphosphonic acid. © 1953 Consultants Bureau

Polarity of P-N bond

The polarity of the P-N bond in the amides of phosphorus acids depends on the valence state of the phosphorus atom and the nature of the substituents attached to both atoms. © 1977 Plenum Publishing CorporationPlenum Publishing Corporation

Reaction of pyridoxal and its azomethines with hydrophosphoryl compounds

© 2016 Taylor & Francis Group, LLC.The products of carbonyl phosphonylation of pyridoxal with alkylphosphinic acid ethyl esters, phosphorous acid dialkyl esters have been obtained for the first time. In some cases, the products of addition are hydrolytically unstable and stabilize by forming internal betaine structures. The reaction of pyridoxal with phosphorous acid in alcohol solutions gives alkoxyfuropyridines possessing the iminium nitrogen atom

Reactions of pyridoxal with aromatic carboxylic acids in alcoholic medium

© 2017, Pleiades Publishing, Ltd. Reactions of pyridoxal with benzoic acid and its derivatives in alcoholic medium afforded alkoxyfuropyridinium salts with potential biological activity

Pyridoxal reactions with amines and aliphatic diamines

© 2016, Pleiades Publishing, Ltd.Interaction of pyridoxal (3-hydroxy-5-hydroxymethyl-2-methylisonicotinaldehyde) with amines, mono- and disubstituted diamines led to the formation of compounds having in their structure imine, imidazolidine, and pyrimidine moieties. Structure of the obtained compounds was proved by IR data, 1H NMR spectroscopy, mass spectrometry, and X-ray diffraction analysis

Phosphorus containing azomethines and furopyridines on the basis of pyridoxal

© 2016 Taylor & Francis Group, LLC.New O-phosphorylated pyridoxal derivatives, based on the azomethine reaction with acid chlorides P(IV) were synthesized. Depending on the nature of the substituent on the nitrogen atomfinal products are phosphorylated furopyridines or azomethines of pyridoxal