- A 31P NMR Study of O,O'-Dialkyldithiophosphates: An Unusual Coupling
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A series of O,O'-dialkyldithiophosphoric acids have been studied by 31P NMR, and a four-bond 31P-1H scalar coupling has been detected.This coupling is unusual because it is observed between phosphorus and only one of two available protons located on the same carbon, even when the alkyl fragment is simply an alkane that should not show conformational preference.Variation of the structural features of alkyl group showed that this coupling involved a "W" pathway. KEY WORDS - 31P NMR O,O'-dialkyldithiophosphoric acids four-bond 31P, 1H coupling
- Ray, Joseph G.,Caspari, Gunter
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- Pyridoxonium salts of chiral and cyclic dithiophosphoric and bisdithiophosphonic acids and their antimicrobial activities
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Pyridoxonium salts of chiral linear and cyclic dithiophosphoric acids were obtained by the reactions of pyridoxine with bis{2-О-[2-methyl-(2S)-3-O-propionyl]}, bis{2-О-[1,4-О,О-dimethyl-(2S)-succinyl]}, and O,O-di-2-butyl dithiophosphoric acids, and cyclic dithiophosphoric acids of 1,3,2-dioxaphosphorinane, 1,3,2-dioxaphospholane, and 1,3,2-dioxaphosphepin structure. Syntheses of acetonide pyridoxonium О,О-dimenthyl dithiophosphates were carried out by the reaction of seven-membered pyridoxine acetonide with О,О-dimenthyl dithiophosphoric acids obtained from (–)-(1 R,2S,5R)-menthol and (+)-(1S,2R,5S)-menthol. Diacetonide pyridoxonium bisdithiophosphonate was also prepared. The antibacterial and antifungal activities of pyridoxonium chiral linear and cyclic dithiophosphates were evaluated.
- Nizamov, Ilyas S.,Belov, Timur G.,Nizamov, Ilnar D.,Nikitin, Yevgeniy N.,Akhmedova, Gulnaz R.,Shilnikova, Olga V.,Timushev, Ildus D.,Salikhov, Ramazan Z.,Shulaeva, Marina P.,Pozdeev, Oscar K.,Batyeva, Elvira S.,Cherkasov, Rafael A.
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