Abstract: Acetylacetone was treated by p-chloro-ω-bromoacetophenone to give 1-(p-ch-lorophenyl)-3-acetyl-l,4-pentandiketone (1). Nine new 1-aryl-2-methyl-3-acetyl—5-(p-chlorophenyl) pyrroles (2)-(10) have been synthesized by the reaction of (1) with various primary amines. Semicarbazones (11)-(18) were prepared from (2)-(9).Compounds (1)-(18) are reported for the first time.