Organic Syntheses via Transition Metal Complexes. 96.<sup>1</sup> 1-Azacycloalkene and 2-Azabicycloalkene Derivatives of 4-Amino-1-metalla-1,3-dienes by Reaction of Saturated Lactims with (1-Alkynyl)carbene Complexes of Chromium and Tungsten
作者:Rudolf Aumann、Zhengkun Yu、Roland Fröhlich
DOI:10.1021/om980068b
日期:1998.6.1
no binuclear derivatives. Both mono- and binuclear metal compounds undergo fast transformations on contact with silica gel. Chromatography of the binuclear tungsten compound (E)-6b on silica gel results in fragmentation of the (cyclobutenyl)carbene unit to give 1,11-bis(tungsta)-5-azaundeca-1,3,6,8,10-pentaene (13) as well as in hydrolysis of the 2-alkoxy pyrrolidine unit with formation of a bis(carbene)
的五元环和反应六元O-烷基lactims〜(CH 2)Ñ -N C(OR)〜5(Ñ = 3)和7(Ñ = 4)(1 -炔基)卡宾配合物(CO)5 M C(OEt)C⋮CPh 1(a,M = Cr; b,W)分别得到双核1-烷氧基-2-氮杂双环[ n .2.0]烯烃衍生物(E)-6和(E)-8,收率为90-94%。七元和八元O-烷基乳酸亚胺〜(CH 2)n的反应-N C(OR)〜9(Ñ = 5)和11(Ñ = 6)用化合物1,得到单核4-(1-氮杂环-2-链烯-1-基)-1- metalla -1,3-丁二烯(E)-10和(E)-11,但没有双核衍生物。单核和双核金属化合物在与硅胶接触后都会发生快速转变。双核钨化合物(的色谱ë) -图6b中(环丁烯基)卡宾单元的碎片在硅胶上的结果,得到1,11-双(氧化钨)-5- azaundeca-1,3,6,8,10五烯(13)以及2-烷氧基吡咯烷单元的