“…Introduction 01 an a-halogen (SD-34, 36, and 39) is not beneficial, as is frequently the case with simple aliphatic amides. Although Frankel (7) report5 sedative and analgesic properties for several aliphatic acyl-p-phenetidides, oiz. lactyl-fi-phenetidide (Lactophenin), dipropylacet-p-phenetidide, diethylmalonyl-p-phenetidide, and dipropylmalonyl-fi-phenetidide, none of the closely related acetoacet-p-phenetidides (SD-15, 18, 21, 23, 2.5, and 36) possess sedative properties, and analgesia was observed with only one (SD-15).…”