Studies on Local Anesthetics. XX. Synthesis of Some alpha-Monoalkylamino-2-methylpropionanilides. A New Useful Local Anesthetic.

Abstract
Five new o-monoalkylamino-2-methylpropionanilides in which the alkyl group is an ethyl, n-propyl, isopropyl, n-butyl or isobutyl group have been synthesised. All 5 compounds possess local anesthetic activity and one of them, the n-propylamino compound ("L67"), had such valuable properties that it was subjected to clinical tests. These showed the new compound to be an effective injection anesthetic.