Functional-Group-Tolerant, Silver-Catalyzed N–N Bond Formation by Nitrene Transfer to Amines
作者:Lourdes Maestre、Ruth Dorel、Óscar Pablo、Imma Escofet、W. M. C. Sameera、Eleuterio Álvarez、Feliu Maseras、M. Mar Díaz-Requejo、Antonio M. Echavarren、Pedro J. Pérez
DOI:10.1021/jacs.6b08219
日期:2017.2.15
Silver(I) promotes the highly chemoselective N-amidation of tertiary amines under catalytic conditions to form aminimides by nitrene transfer from PhI═NTs. Remarkably, this transformation proceeds in a selective manner in the presence of olefins and other functional groups without formation of the commonly observed aziridines or C-H insertion products. The methodology can be applied not only to rather
Palladium(II) 3-iminophosphine (3IP) complexes: Active precatalysts for the intermolecular hydroamination of 1,2-dienes (allenes) and 1,3-dienes with aliphatic amines under mild conditions
作者:Glenn Kuchenbeiser、Andrew R. Shaffer、Nicholas C. Zingales、John F. Beck、Joseph A.R. Schmidt
DOI:10.1016/j.jorganchem.2010.08.033
日期:2011.1
Accordingly, a series of palladium(II) complexes employing this new ligand have been synthesized and utilized in the intermolecular hydroamination of 3-methyl-1,2-butadiene (1,1-dimethylallene) and 2,3-dimethyl-1,3-butadiene with secondary amines. The complex [(3IPAr)Pd(allyl)]OTf displays excellent catalytic activity in these reactions, selectively producing allylic amine products in high conversion
New Insights into the Mechanism of Palladium-Catalyzed Allylic Amination
作者:Iain D. G. Watson、Andrei K. Yudin
DOI:10.1021/ja055288c
日期:2005.12.1
sigma-complexes, which is consistent with NMR data. The apparent stability of branched allyl aziridines towards palladium-catalyzed isomerization is attributed to a combination of factors that stem from a higher degree of s-character of the aziridine nitrogen compared to other amines. The reaction allows for regio- and enantioselective incorporation of aziridine rings into appropriately functionalized building
Cationic [(Iminophosphine)Nickel(Allyl)]<sup>+</sup>Complexes as the First Example of Nickel Catalysts for Direct Hydroamination of Allenes
作者:Hosein Tafazolian、Joseph A. R. Schmidt
DOI:10.1002/chem.201605611
日期:2017.1.31
The first example of nickel‐catalyzed hydroamination of allenes is reported. The new cationic [(3‐iminophosphine)nickel(allyl)]+ catalysts have been fully characterized and act regioselectively in the catalytic hydroamination of allenes with secondary amines at room temperature.
Xantphos or Xantphos chalcogenide complexes with general folmula [PdCl2(X∩X)] (where X = P, O, S or Se) were synthesized by the addition of corresponding ligands to [PdCl2(COD)] (COD = 1,5-cyclooctadiene). Prepared Complexes [PdCl2(Xantphos)] and [PdCl2(Xantphos = S)] showed distorted square planar geometries, from X-ray crystallographic analysis. All of the prepared complexes showed activity toward intermolecular