前文已报导1-芳基-2-甲基-3-乙酰基-5-对氯苯基吡咯。本文用间硝基-ω-溴代苯乙酮与乙酰丙酮作用,得到1-间硝基苯基-3-乙酰基-1,4-戊二酮(1),(1)与各种不同的芳香族伯胺在冰醋酸存在下进行环合反应,生成1,2,3,5-四取代吡咯(2)至(10)。后者与氨基脲反应得到相应的缩氨脲。这些都是新化合物,其性质见下 It has previously been reported that 1-aryl-2-methyl-3-acetyl-5-p-chlorophenylpyrrole. Inter-nitro-ω-bromoacetophenone was reacted with acetylacetone to give 1-m-nitrophenyl-3-acetyl-1,4-pentanedione (1) Aromatic primary amine is subjected to a cyclization reaction in the presence of glacial acetic acid to produce 1,2,3,5-tetrasubstituted pyrrole (2) to (10). The latter is reacted with semicarbazide to give the corresponding semicarbazone. These are new compounds, the nature of which is below