CO Extrusion in Homogeneous Gold Catalysis: Reactivity of Gold Acyl Species Generated through Water Addition to Gold Vinylidenes
作者:Janina Bucher、Tim Stößer、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201409859
日期:2015.1.26
describe a new gold‐catalyzed decarbonylative indene synthesis. Synergistic σ,π‐activation of diyne substrates leads to gold vinylidene intermediates, which upon addition of water are transformed into gold acyl species, a type of organogold compound hitherto only scarcely reported. The latter are shown to undergo extrusion of CO, an elementary step completely unknown for homogeneousgoldcatalysis. By tuning
1-aryl-2-(o-hydroxymethylphenyl)ethanols from readily available 3-substituted phthalides are described. Their reaction with polyphosphoric acid is a route, superior in convenience and yield, to 2-arylindenes.
[EN] PROCESS FOR THE PREPARATION OF 2,2'-BIS-INDENYL BIPHENYL LIGANDS AND THEIR METALLOCENE COMPLEXES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE LIGANDS 2,2'-BIS-INDÉNYL BIPHÉNYLE ET DE LEURS COMPLEXES MÉTALLOCÈNES
申请人:SAUDI BASIC IND CORP
公开号:WO2015024938A1
公开(公告)日:2015-02-26
The invention relates to a novel process for the preparation of 2, 2'- bis indenyl biphenyl Iigands of following formula (3): The invention also relates to metallocene complexes prepared using the novel process for the preparation of 2, 2-bis indenyl biphenyl Iigands. The invention also relates to novel intermediates used in the process for the preparation of 2, 2'-bis indenyl biphenyl Iigands.
Joining the rings: the preparation of 2- and 3-indenyl-triptycenes, and curious related processes
作者:Kirill Nikitin、Helge Müller-Bunz、Yannick Ortin、Michael J. McGlinchey
DOI:10.1039/b703437g
日期:——
is accompanied by a novel palladium-catalysed carbocyclisation reaction leading to the indenophenanthrylene . The addition of benzyne to 9-(3-indenyl)anthracene, , yields the corresponding indenyltriptycene, , and, surprisingly, the anthracenyl methano-bridged phenanthrene . It has been demonstrated that 2-arylindenes can act as 1,3-dienes in the [4 + 2] cycloadditions of benzyne. The products , , and
The photochemical behavior of trans-4-(N-arylamino)stilbene (1, aryl = 4-substituted phenyl) in solvents more polar than THF is strongly dependent on the substituent in the N-aryl group. This is attributed to the formation of a twisted intramolecular charge transfer (TICT) state for those with a methoxy (10M), methoxycarbonyl (1CO), or cyano (1CN) substituent but not for those with a methyl (1Me), hydrogen (1H), chloro (1Cl), or trifluoromethyl (1CF) substituent. On the basis of the ring-bridged model compounds 3-6, the TICT states for 1CN and 1CO result from the twisting of the anilino-benzonitrilo C-N bond, but for 10M it is from the twisting of the stilbenyl-anilino C-N bond, both of which are distinct from the TICT states previously proposed for N,N-dimethylaminostilbenes.