A convenient synthetic route to phosphate esters from phosphites

✍ Scribed by Purnanand; B.S. Batra; B.P. Pant

• Publisher: Elsevier Science
• Year: 1989
• Tongue: French
• Weight: 120 KB
• Volume: 30
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)99554-6

✦ Synopsis

Dialkyl arylphosphate esters have been synthesized in improved yields by the reaction of dicyclohexylamine salts of substituted phenols with dialkyl hydrogen phosphite and carbon tetrachloride. The reaction proceeds through the corresponding phosphorochloridates.

Dialkyl arylphosphate esters form an important class of insecticides and are synthesized by well known methods 172 . Reaction between phosphorochloridate and sodium salt of substituted phenols is the most attempted method, but isolation of sodium salt of phenols having pka above 7.15 are not readily accessible.

Recently we observed that a wide variety of phenols having pka values between 7.15