1957 年 77 巻 7 号 p. 707-710
1-Phenyl-2-methyl-3, 4-bisbromomethyl-3-pyrazolin-5-one, m. p. 187° (decomp.), was prepared by the application of 2.2 moles of N-bromosuccinimide to 1-phenyl-2, 3, 4-trimethyl-3-pyrazolin-5-one or 1.15 moles of the imide to 1-phenyl-2, 4-dimethyl-3-bromomethyl-3-pyrazolin-5-one. Although the melting point of the product differs from that (175°) given in literature, its analytical values agreed well and its structure was confirmed by the following reactions. The 3, 4-bisbromomethyl compound was reacted with several kinds of aliphatic and aromatic primary amines and new pyrroline derivatives, which were negative to secondary amine reactions, were obtained.