Local Anaesthetic Activity in Diethylaminoacetyl Derivatives of Substituted Benzylamines

Abstract
Six diethylaminoacetyl derivatives of general formula (III) are more potent than lignocaine as local anaesthetics. All cause erythema or necrosis of guinea-pig skin on intradermal injection except III, R = NH2, R' = H, and R = O(CH2)2Ph. This compound is several times more potent than lignocaine and in equipotent concentrations did not cause any tissue damage to skin on intradermal injection.