Synthesis of Imido-Substituted 3,8-Diphenyl-1,2-diazacycloocta-2,4,6,8-tetraenes and Their Thermolysis
作者:Seiichi Yogi、Kozo Hokama、Sadamori Takayoshi、Otohiko Tsuge
DOI:10.1246/bcsj.60.731
日期:1987.2
Nucleophilic substitution of 4,7-dichloro-3,8-diphenyl-1,2-diazocine with succinimide, phthalimide, N-methyl-p-toluenesulfonamide, and o-benzosulfimide, in the presence of silver oxide, gave the corresponding 4-mono(imido)- and 4,7-di(imido)-1,2-diazocines. 4-Acetoxy-7-phthalimido- and 4-phenylthio-7-phthalimido-1,2-diazocine were also prepared. Thermolysis of the mono(imido)-1,2-diazocines in xylene under reflux afforded the corresponding di(imido)-1,2-diazocine and/or five pyridine derivatives, whose relative yields depended upon the nature of imido substitutents in the diazocines. However, 4,7-di(imido)-1,2-diazocines did not decompose in xylene under reflux. Thermolysis of 4,7-bis(phthalimido)-1,2-diazocine at 300–310 °C gave 3,6-bis(phthalimido)-2-phenylpyridine with the extrusion of benzonitrile. In the thermolysis of the acetoxy(230–240 °C) or phenylthio-substituted 1,2-diazocine (240–260 °C), 6-acetoxy- and 6-benzoyl-3-phthalimido-2-phenylpyridine, or 6(and 3)-phenylthio-3(and 6)-phthalimido-2-phenylpyridines were isolated together with benzonitrile, respectively. The feature of thermolysis was also discussed.
在氧化银存在下,用琥珀酰亚胺、邻苯二甲酰亚胺、N-甲基-对甲苯磺酰胺和邻苯并磺酰亚胺对 4,7-二氯-3,8-二苯基-1,2-重氮辛进行亲核取代,得到相应的 4-单(亚氨基)-和4,7-二(亚氨基)-1,2-二氮辛。还制备了4-乙酰氧基-7-邻苯二甲酰亚胺基-和4-苯硫基-7-邻苯二甲酰亚胺基-1,2-重氮辛。单(亚氨基)-1,2-重氮辛在二甲苯中回流下热解得到相应的二(亚氨基)-1,2-重氮辛和/或五种吡啶衍生物,其相对产率取决于重氮辛中亚氨基取代基的性质。然而,4,7-二(亚氨基)-1,2-重氮辛在二甲苯中回流下不分解。 4,7-双(邻苯二甲酰亚胺)-1,2-重氮辛在 300–310 °C 下热解,并挤出苯甲腈,得到 3,6-双(邻苯二甲酰亚胺)-2-苯基吡啶。在乙酰氧基(230–240°C)或苯硫基取代的1,2-重氮辛(240–260°C)、6-乙酰氧基-和6-苯甲酰基-3-邻苯二甲酰亚胺基-2-苯基吡啶或6(和3)-苯硫基-3(和6)-邻苯二甲酰亚胺基-2-苯基吡啶分别与苯甲腈一起分离。还讨论了热解的特点。