ChemInform Abstract: Preparation of Chloromethyl‐ and Methoxychloromethyldiorganophosphine Oxides.

Abstract

243ChemInform Abstract The complex (I), formed from benzene, phosphorus trichloride, and aluminum trichloride, is chloromethylated with paraformaldehyde (II) in the presence of phosphoryl chloride to give the phosphine oxide (III). The phosphine oxide (V) is obtained from (I) and dichloromethyl methyl ether (IV). Reaction of dioctylphosphine oxide (VI) with (II) and subsequent chlorination yield the phosphine oxide (VIII). (1H-NMR-data).

Recovery of uranium (VI) from concentrated phosphoric acid using bifunctional reagents

“…Di-n-octylphosphine oxide (1a) or di(2-ethylhexyl)phosphine oxide (1b) were prepared from di-n-butylphosphite using the appropriate (alkyl)magnesium bromide (Pogozhev et al, 2013;Williams and Hamilton, 1952). The treatment with paraformaldehyde afforded the desired alcohol (2), which was then substituted into a chloride derivative (3) using phosphorus pentachloride (PCl5) (Chauzov et al, 1986). The (chloromethyl) dialkyl-phosphine oxide (3) was then used in an Arbuzov reaction with a suitable trialkyl phosphite (tributyl, triisopropyl, or triisodecyl phosphite).…”