A Convenient One-Pot Synthesis of β -(Trifluoromethyl)allylaminophosphonic and Benzylaminophosphonic Acids

Abstract

The reductive condensation of aminoalkylphosphonic acids with β -chloro- or β -ethylthio-(β -trifluoromethyl)acroleins leads to secondary (trifluoromethyl)allylaminophosphonic acids in moderate to good yields. The method appears to be useful for the preparation of benzylaminophosphonic acids.

Keywords:

• Allylaminophosphonic acids
• benzylamino-phosphonic acids
• reductive amination
• β-(trifluoromethyl)acroleins

Dedicated to Professor Marian Mikołajczyk from the CBMiM PAN in Łódź, Poland, on the occasion of his 70th birthday.

This work was supported by the Faculty of Chemistry, University of Łódź.