large extent by the nature of the substituents in the pyrazoline ring. The structures of phthalimidoazimines were established based on the NMR spectra and X-ray diffraction data. Thermal conversions of the resulting adducts, which proceeded either with retention or with opening of the spiro-fused cyclopropane ring, were studied.
在 -20°C 至 -30°C 的温度下,在螺(1-
吡唑啉
环丙烷)存在下用四
乙酸铅氧化 N-
氨基邻苯二甲
酰亚胺,导致正式生成邻苯二甲
酰亚胺,然后在
吡唑啉环的 N=N 键上加成形成 5(3)-取代的 N-spiro[1-pyrazolinio-3(5),1'-cyclopropane]}-N-邻苯二甲
酰亚胺(azimines),其区域异构组成在很大程度上取决于取代基的性质在
吡唑啉环中。基于核磁共振谱和X射线衍射数据确定邻苯二甲
酰亚胺的结构。对所得加合物的热转化进行了研究,该转化伴随着螺稠
环丙烷环的保留或打开而进行。