Reaction of aminocarbene complexes of chromium with alkynes IV. New transformations of the nitrogen ylide complexes derived therefrom
作者:Cecile Bouancheau、Michele Rudler、Evelyne Chelain、Henri Rudler、Jacqueline Vaissermann、Jean-Claude Daran
DOI:10.1016/0022-328x(95)05447-w
日期:1995.6
obtained from aminocarbene complexes of chromium and diphenylacetylene failed. With dioxygen under UV irradiation, insertion of an oxygen atom into the NC(O) bond gave aminolactones 8 instead. With sulfur a series of aminofuran complexes 9 were obtained. Olefins such as cyclopentadiene and cyclooctene did not cycloadd to these ylide complexes. Whereas no reaction was observed with cylooctene, with cyclopentadiene
试图从由铬和二苯基乙炔的氨基卡宾配合物获得的一系列N- ylide配合物中除去Cr(CO)3基团的尝试失败了。在紫外线照射下,用双氧将氧原子插入NC(O)键可得到氨基内酯8。用硫获得了一系列氨基呋喃配合物9。烯烃如环戊二烯和环辛烯没有环加到这些叶立德络合物中。而没有反应物用cylooctene观察到,与环戊二烯的总质子化脱甲基-脱金属反应ñ -二甲基内鎓盐络合物图4a和4b中的pyrrolinones 10A和10B发生。用(ArPS 2)2观察到相同的质子化-脱烷基化反应。因此4a,4b和4d导致10a,10b和10d。通过对衍生自哌啶的N-基化物4f和4g进行类似的反应来确定离去烷基的命运,得到内酯硫醇11f和11g。氨基呋喃配合物9b的结构通过X射线晶体学明确地确定。N的结构之间的关系-叶立德配合物和反应产物进行了讨论。