120308-33-0Relevant academic research and scientific papers
Alkeneamino-carbene Complexes of Chromium: Unexpected Ring-expanison and Ring-contraction Reactions upon Alkyne Insertions
Parlier, A.,Rudler, H.,Yefsah, R.,Daran, J. C.,Knobler, C.
, p. 635 - 637 (2007/10/02)
The cycloaminocarbene complex (1) reacts in boiling benzene with diphenylacetylene to give, upon alkyne insertion, C-N bond cleavage, rearrangement, and CO insertion, two new arene chromium complexes of unsaturated lectams (3) and (4) which result from, respectively, a ring contraction and a ring expansion reaction, and which have been fully characterized by X-ray analysis.
Unexpected ring opening of cycloaminocarbene complexes of chromium upon alkyne insertion reactions
Rudler, H.,Parlier, A.,Yefsah, R.,Denise, B.,Daran, J. C.,et al.
, p. 245 - 272 (2007/10/02)
Aminocarbenechromium complexes of the general structure (CO)5Cr=C(R)N(CH2)nXCH2 (N = 0, X = CH2; n = 1, X = CH2; n = 1 X = CH=CH; n = 2 X = CH=CH; R = CH3, Ph) react with alkynes to give insertion of one or two molecules of alkyne and one molecule of CO, and C-N bond cleavage, new polycyclic heterocycles.The reactions of the pyrroline-, the tetrahydropyridine-, the pyrrolidine- and the methylaziridine-substituted complexes are mainly considered, and the results of X-ray structural studies of the new products are presented.The mechanism of the rearrangement of a 1,5 dipole is discussed.
