ChemInform Abstract: PREPARATION OF BENZYLTHIOPHOSPHONIC ACID DIBROMIDE FROM TRIBENZYL TRITHIOPHOSPHITE AND PHOSPHORUS TRIBROMIDE

Abstract

Tribenzyl‐trithiophosphit (I) und Phosphor‐tribromid (II) reagieren zum gesuchten Dibromid (III), das in das Diamid (IV) übergeführt wird.

Exchange reactions of tetrathiophosphates with thiophosphoryl chloride

“…As should be expected, the reactions of tetrathiophosphates with P(S)C13 occur at higher temperatures than those with P(S)Br3, and they can be completed on heating in a steel tube at 180--220 ~ at temperatures >250 ~ partial resinification of the reaction mixture is observed. It was also revealed that the exchange of thiol groups of tetrathiophosphates can occur stepwise, and at the molar ratio 1 : P(S)CI 3 = 2 : 1, dialkyl trithiochlorophosphates (2) are predominantly formed and isolated in 52--78% yields (Eq. (1), Table 1).…”