25627-20-7Relevant articles and documents
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Abramovitch,R.A. et al.
, p. 2390 - 2394 (1963)
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Molybdenum monoaryloxide pyrrolide alkylidene complexes that contain mono-ortho-substituted phenyl imido ligands
Lichtscheidl, Alejandro G.,Ng, Victor W. L.,Mueller, Peter,Takase, Michael K.,Schrock, Richard R.
scheme or table, p. 2388 - 2394 (2012/06/04)
Monaryloxide pyrrolide (MAP) molybdenum imido alkylidene complexes of the type Mo(NArX)(CHCMe2R)(Me2Pyr)(OR′) (Me2Pyr = 2,5-dimethylpyrrolide) have been prepared in which NAr X is an ortho-substituted phenylimido group (X = Cl (NAr Cl), CF3 (NArCF3), i-Pr (NAriPr), t-Bu (NArtBu), mesityl (NArM), or TRIP (TRIP = triisopropylphenyl; NArT)) and OR′ = O-2,3,5,6-(C 6H5)4C6H (OTPP), O-2,6-(2,4,6-Me3C6H2)2C 6H3 (OHMT), or O-2,6-(2,4,6-i-Pr3C 6H2)2C6H3 (OHIPT). The object was to explore to what extent relatively "large" NAr M or NArT ligands would alter the performance of MAP catalysts in reactions that have been proposed to depend upon the relative size of the imido and OR′ groups. Preliminary studies employing the ring-opening metathesis polymerization of 5,6-dicarbomethoxynorbornadiene as a measure of selectivity suggest that a single phenylimido ortho substituent, even in an NArM or NArT group, does not produce any unique behavior and that the outcome of the ROMP reaction correlates with the overall relative size of the imido and OR′ group. Single-crystal X-ray structures of six species that contain the new NArM or NArT groups are reported.
INTER- AND INTRA-MOLECULAR AROMATIC N-SUBSTITUTION BY ARYLNITRENIUM-ALUMINIUM CHLORIDE COMPLEXES GENERATED FROM ARYL AZIDES IN THE PRESENCE OF ALUMINIUM CHLORIDE
Takeuchi, Hiroshi,Maeda,Munenori,Mitani, Michiharu,Koyama, Kikuhiko
, p. 57 - 60 (2007/10/02)
Reactions of phenyl azide with aromatic compounds ( i. e. benzene, toluene, ethylbenzene, cumene, anisole, and bromobenzene ) in the presence of AlCl3 gave diarylamines, whwreas those of phenyl azides with an electron-donating group such as Me and OMe yield little of the corresponding diarylamines ( tarformation takes place ).The reaction of 4-nitrophenyl azide with benzene in the presence of AlCl3 gave 4-nitrophenyl(phenyl)amine and a C-substitution product, 2-amino-5-nitrobiphenyl.Decomposition of 2-azidophenyl(phenyl)methane and 2-azidobiphenyls in CH2Cl2 in the presence of AlCl3 underwent an N-cyclization to afford 9,10-dihydroacridine and carbazoles, respectively, in good yields.The kinetic data on the decomposition of aryl azides and a Hammet plot ( with p= -6.0 ) for the formation of diarylamines suggest that the products are formed by an aromatic N-substitution of arylnitrenium-AlCl3 complexes via azide-AlCl3 complexes.We further argue the character of arylnitrenium-AlCl3 complexes.