Reactions of O,O-dialkyldithiophosphoric acids with non-activated α-olefins

Electrophilic addition reactions of O,O-dialkyldithiophosphoric acids to non-activated α-olefins proceeding in accordance with the Markovnikov's rule were studied. In the absence of a catalyst these reactions occur very slowly to give the products in low yields, while Lewis acid as a catalyst can greatly accelerate the reaction and increase the conversion in the Ad E-processes. A similar acceleration of the addition processes and an increase in the reaction product yield occur at the action of ultrasound on the reaction medium. © 2012 Pleiades Publishing, Ltd.

Calculation of fundamental thermochemical parameters of phosphoranes by the additivity scheme

Using the additivity scheme, experimental enthalpies of vaporization and formation of phosphoranes were analyzed, group contributions to the enthalpies of vaporization and formation were determined, and thermochemical parameters of five-coordinate phosphorus derivatives were calculated. © 2005 Pleiades Publishing, Inc

Enthalpies of specific interaction of heteroatom derivatives of three-coordinate phosphorus with chloroform

The nature of hydrogen bonds formed by chloroform with three-coordinate phosphorus derivatives containing sulfur, silicon, and chlorine atoms and their carbon analogs was revealed by analysis of the experimental enthalpies of specific interactions. The main donor centers in the examined compounds were found to be oxygen atoms and π-electron systems of aromatic rings. Sulfur atoms give rise to weaker complexes as compared to oxygen. Phosphorus, chlorine, and silicon atoms are not involved directly in specific interactions with the solvent. © 2008 MAIK Nauka

Reactions of 2,4-diaryl 1,3,2,4-dithiadiphosphetane-2,4- disulfides with disilylated resorcinols

© 2016 Taylor & Francis Bis(trimethylsilyl) esters of bisaryldithiophosphonic acids were obtained in 70–81% yields by the reactions of 2,4-diaryl 1,3,2,4-dithiadiphospheta ne-2,4-disulfides with 1,3-bis(trimethylsilyloxy)benzene and 2-methyl 1,3-bis(trimethylsilyloxy)benzene

Polynomial dependence for the calculation of vaporization enthalpies of organophosphorus compounds

Enthalpies of vaporization of organic phosphorus compounds are related to the normal-pressure boiling points through a polynomial dependence. Each class of organophosphorus compounds is characterized by its own specific parameters of the general dependence. The polynomial dependences may be used for the calculation of vaporization enthalpies of organophosphorus compounds with different modes of phosphorus coordination. © 2005 Pleiades Publishing, Inc

Electronic effects on the enthalpy of specific interaction of three-coordinate phosphorus compounds and acetals with chloroform

The effect of electronic factors in five- and six-membered cyclic three-coordinate phosphorus compounds and acetals on the enthalpy of their specific interaction with chloroform was estimated. © 2008 MAIK Nauka

Study of intra- and intermolecular interactions with participation of α-phosphorylated amines and alcohols in different solvents

Specific interactions of α-hydroxy- and α-aminophosphonates in chloroform and pyridine solutions were studied by theoretical (molecular mechanics) and experimental methods (calorimetry and IR spectroscopy). A competition between intra- and intermolecular interactions and effect of steric factor in molecules of organophosphorus compounds were revealed

Reactions of 2,4-diaryl 1,3,2,4-dithiadiphosphetane-2,4-disulfides with disilylated resorcinols

© 2016 Taylor and Francis.Bis(trimethylsilyl) esters of bisaryldithiophosphonic acids were obtained in 70-81% yields by the reactions of 2,4-diaryl 1,3,2,4-dithiadiphospheta ne-2,4-disulfides with 1,3-bis(trimethylsilyloxy)benzene and 2-methyl 1,3-bis(trimethylsilyloxy)benzene

Thiophosphorylation of pharmacophoric phenols, diols, and triols

Novel organyldithiophosphonic and bis(aryldithiophosphonic) acids were obtained by the reaction of 2,4-diorganyl 1,3,2,4-dithiadiphosphetane-2,4- disulfides with paracetamol, 4-(1H-pyrrol-1-yl)phenol, ethambutol dihydrochloride, vitamin B6, and its acetonide derivatives. © 2013 Copyright Taylor and Francis Group, LLC

1,2:5,6-Di-O-Cyclohexylidene- d -Mannitol and Its Bis(Trimethylsilyl) Ether in the Dithiophosphorylation Reactions

© 2016 Wiley Periodicals, Inc.The reaction of 2,4-diaryl 1,3,2,4-dithiadiphosphetane-2,4-disulfide with diketonide of d-mannitol has been found to give optically active bisaryldithiophosphonic acids transformed into the corresponding diammonium salts by the treatment of n-hexadecylamine. O,O-Bis(trimethylsilyl) ether of d-mannitol ketonide reacts with 2,4-diaryl 1,3,2,4-dithiadiphosphetane-2,4-disulfide to form chiral S,S-disilylbisaryldithiophosphonate. Diammonium bisaryldithiophosphonate possesses antibacterial activity against Staphylococcus aureus ATCC 6538-P