LEWIS ACID MEDIATED AMINOLYSIS OF ESTERS: CONVERSION OF METHYL (S)-( -)-2-CHLOROPROPIONATE TO ( S ) - (t ) -N , N-DI ETHYL- 2-CHLOROPROPI ONAMIDE ... Stauf f er Chemical Company de Guigne Technical Center Richmond, California 94804 ... Methyl (S)-(-)-2-chl oropropionate 1 is converted to ... During the course of our investigation' of optically active aryloxypropionate herbicides, we became interested in the conversion of methyl (S)-(-)-2-~hloropropionate 1 ...