Catalytic and selective ring expansion reactions of o-phenyl-substituted 2H-azaphosphirene tungsten complexes
作者:Christoph Neumann、Emanuel Ionescu、Udo Schiemann、Manuela Schlenker、Maren Bode、Frank Ruthe、Peter G Jones、Rainer Streubel
DOI:10.1016/s0022-328x(01)01351-1
日期:2002.2
2H-azaphosphirene complexes 6a–c and 7d are reacted with benzonitrile in dichloromethane in the presence of ferrocenium hexafluorophosphate to furnish the 2H-1,2,4-diazaphosphole complexes 8a–d (8a: R=Me, 8b: R=OMe, 8c: R=NMe2, 8d: R=H); the reaction course will be discussed. All complexes were unambiguously confirmed by NMR spectroscopy and elemental analysis and, additionally complexes 2b, 5 and 6b by
合成了邻苯基取代的乙氧基和氨基碳烯五羰基钨配合物2a – c和3a – c,在三乙胺存在下,后者与氯亚甲基膦4在乙醚中反应,得到邻苯基取代的2 H-氮杂磷杂环戊烯配合物6a – c通过消除三乙基氯化铵;在甲氧基和二甲氨基取代的配合物6b,c的情况下,延长的反应时间是显着的。2 H-氮杂磷腈配合物6a –c和7d在六氟磷酸铯存在下与二氯甲烷中的苄腈反应,得到2 H -1,2,4-二氮杂磷化合物8a - d(8a:R = Me,8b:R = OMe,8c:R = NMe 2,8D:R = H); 将讨论反应过程。通过NMR光谱法和元素分析明确地确认了所有复合物,另外通过X射线分析确认了复合物2b,5和6b。