ChemInform Abstract: ZUR UMSETZUNG DER ESTER VON SAEUREN DES DREIWERTIGEN PHOSPHORS MIT TETRACHLORKOHLENSTOFF

Abstract

Die Phosphite (Ia)‐(Ie) reagieren mit Tetrachlorkohlenstoff (II) zu den Dialkylestern der Trichlormethylphosphonsäure (IIIa)‐(IIIe).

The Synthesis of Dialkyl α-Halogenated Methylphosphonates

“…73,[145][146][147][148][149][150] In the case of ethyl, n-butyl, hexyl, octyl, decyl, dodecyl phosphonates, 141 the reaction goes to completion after a 3 hours reflux and after 8 hours in the case of methyl phosphonate (49 %). 142 This method is now widely used. 71,109,112,143,144 Diethyl trichloromethylphosphonate was also obtained from diethyltrimethylsilyl phosphite in 60 % yield, 151 and from benzyldiethyl phosphite in the presence of dibenzoyl peroxide and an ultraviolet source in a radical induced reaction in 87 % yield (compared to 26 % without the dibenzoyl peroxide).…”