New Method for the Synthesis of Ammonium Salts of O,O′-Dialkyldithiophosphoric Acids on the Basis of Elemental Phosphorus and Sulfur—A Method for the Preparation of Effective Inhibitors for Carbon Dioxide Corrosion of Mild Steel

Green Chemistry. Reaction of Elemental Phosphorus (P4) and Elemental Sulfur with Protonodonor Reagents: New Methods for the Synthesis of Ammonium Salts of S,S′‐Dialkyltetrathiophosphoric Acids and Octathiotetraphosphetane

“…In the present article, the study of the interaction of elemental (white) phosphorus with the elemental sulfur—amine—protonodonor system is continued. Previously, we showed that it is possible to obtain valuable organophosphorus synthesis products, such as ammonium salts of O,O′‐diesters of dithiophosphoric acid (a corrosion inhibitor) among others, based on the use of elemental phosphorus, sulfur, amines, alcohols, and/or phenols as starting materials .…”

Reaction of elemental phosphorus (P4) and sulfur with amines in the presence of alkylene glycols: New method to prepare octathiotetraphosphetane ammonium salts

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Syntheses based on cleavage of the phosphorusphosphorus bond in the molecule of elemental (white) phosphorus open the easiest and environmentally friendly opportunities to prepare many useful organophosphorus compounds [1][2][3].We have recently demonstrated that reactions of white phosphorus (P 4 ) and elemental sulfur with proton-donating reagents easily proceed in the presence of amines [4][5][6], yielding ammonium salts of phosphorous and hypophosphorous acids and diesters of dithiophosphoric acid. The reaction of white phosphorus and sulfur with aliphatic thiols in the presence of amines has been shown to give the fourmembered cyclic phosphorus compounds, ammonium salts of 1,2,3,4-tetramercapto-1,2,3,4-tetrathioxotetraphosphetane [7,8], with moderate yields.

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