Easy access to C,C′-bifunctionalized 1H-phosphirene–tungsten complexes: evidence for ambiphilic reaction behaviour of a phosphanediyl–tungsten complex
作者:Annette Ostrowski、Jörg Jeske、Peter G. Jones、Rainer Streubel
DOI:10.1039/c39950002507
日期:——
The 2H-azaphosphireneâtungsten complex 1 reacts with ethoxyacetylene 2a or dimethyl acetylenedicarboxylate 2b to yield C,Câ²-bifunctionalized 1H-phosphireneâtungsten complexes 4a,b; compounds 4a,b are characterized by NMR spectroscopy (13C, 31P) and complex 4a by single-crystal X-ray diffraction.
Synthesis of 2<i>H</i>-1,2-Azaphosphole Complexes by [3 + 2] Cycloaddition of Nitrilium Phosphane−Ylide Complexes with Various Alkynes: Studies of the C-Substituent and Metal Effects on the Reaction Course
作者:Hendrik Wilkens、Annette Ostrowski、Jörg Jeske、Frank Ruthe、Peter G. Jones、Rainer Streubel
DOI:10.1021/om990537p
日期:1999.12.1
Thermal ring opening of [2-(bis(trimethylsilyl)methyl)-3-phenyl-2H-azaphosphirene-κP]pentacarbonylchromium(0), -molybdenum(0), or -tungsten(0) (1a−c) in the presence of three different alkynes, phenylacetylene, ethyl acetylenecarboxylate (EAC), and dimethyl acetylenedicarboxylate (DMAD) (i−iii), was investigated, using toluene (a) and benzonitrile (b) as solvents, whereby special emphasis was to determine