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Synthesis of phosphorus‐substituted dialkylamides of organophosphorus acids, containing P–C–N–P moiety

“…The 1 H, 13 C, and 31 P NMR spectra were obtained on a Varian VXR-400 spectrometer (400, 100, and 162 MHz, respectively) in CDCl 3 against TMS ( 1 H, 13 C) and 85% H 3 PO 4 in D 2 O ( 31 P). All reactions were carried out under dry argon in anhydrous solvents.…”

Synthesis of functionalized 2‐trimethylsiloxy‐substituted O‐trimethylsilyl alkylphosphonites, their analogues, and derivatives

“…b. To a solution of 9.4 g of phosphonite 11 in 50 mL of methylene chloride, a solution of 3.3 g of N-(chloromethyl)piperidine in 20 mL of methylene chloride was added dropwise with stirring at 10 • C. The solvent was then removed, and the a The elemental analysis of phosphonate 17 was made in [10].…”

Synthesis of phosphorus-substituted dialkylamides of organophosphorus acids, containing PCH2NP fragments

“…31 P NMR spectrum, d P , ppm: 22.01 s (cf. [8]). The 31 P NMR spectrum of the low-boiling fraction contains a signal of N,N-bis(diethoxyphosphino)-N-ethylamine (IXb), d P 143.72 ppm (cf.…”

“…In the present work we have developed convenient methods for preparing novel organophosphorus acid amides containing PCH 2 NP fragments. It was previously shown that easily available N-(trimethylsilyl)aminomethylphosphonates (A) [4] are convenient synthons for preparing promising phosphorus-containing carboxamides and sulfonamides containing PCH 2 NC(O) and PCH 2 NSO 2 fragments [5]. We found that the reaction of phosphonates A with chlorides of three-and four-coordinate organophosphorus acids in methylene chloride leads to phosphorus-substituted amides I3VI in high yields.…”

“…Hence, under conditions of this reactions, ring cleavage in compounds B occur mainly by a symmetric pathway (cf. [4]). …”