1739-00-0Relevant articles and documents
β-phenylethylamines, indolines and isoquinolones via hydroamination of styrenes by microwave irradiation
Seijas,Vázquez-Tato,Martínez
, p. 875 - 877 (2001)
Microwave irradiation promotes hydroamination of styrenes. This method can be used as a direct way of producing different kinds of bioactive compounds: open chain compounds like β-phenylethylamines or cyclized products like indolines or isoquinolones.
Anti-Markovnikov hydroaminations of styrene catalyzed by palladium(II) N-heterocyclic carbene complexes under conventional and microwave heating
G?k, Yetkin,Yi?it, Beyhan,?zero?lu ?elikal, ?zlem,Yi?it, Murat
, p. 591 - 596 (2018)
Six palladium(II) complexes with benzimidazole-based N-heterocyclic carbene ligands were synthesized by transmetallation reactions between silver(I) N-heterocyclic carbene complexes and PdCl2(PhCN)2. The complexes were characterized by physicochemical and spectroscopic methods. The palladium complexes were tested as catalysts for intermolecular hydroamination reactions of styrene with various anilines in ionic liquids under both conventional and microwave heating. All of these complexes proved to be catalytically active in these reactions. The anti-Markovnikov addition products were selectively obtained by using 1?mol% of the palladium complex.
Titanium amido- and imido-complexes supported by a tridentate pyrrolyl ligand: Syntheses, characterisation and catalytic activities
Chen, Zhou,Li, Lei,Chen, Yanmei,Hu, Bin,Wu, Jian,Wang, Xiufang,Lei, Tao,Li, Yahong
, p. 249 - 253 (2012)
The complexes [Ti(NMe2)2(pmpmi)] [H2pmpmi = (2-pyrrolylmethene)-(2-pyrrolylmethyl)imine], [Ti(NtBu)(pmpmi)(py) 2], [Ti(NtBu)(pmpmi)(dpy)] and [Ti(NPh)(pmpmi)(py) 2] have been prepared, characterised and shown to be pre-catalysts for the hydroamination of phenylacetylene with aniline and p-chloroaniline. The X-ray structures of [Ti(NMe2)2(pmpmi)], [Ti(N tBu)(pmpmi)(dpy)] and [Ti(NPh)(pmpmi)(py)2] have been determined.
Minimization of Back-Electron Transfer Enables the Elusive sp3 C?H Functionalization of Secondary Anilines
Zhao, Huaibo,Leonori, Daniele
supporting information, p. 7669 - 7674 (2021/03/08)
Anilines are some of the most used class of substrates for application in photoinduced electron transfer. N,N-Dialkyl-derivatives enable radical generation α to the N-atom by oxidation followed by deprotonation. This approach is however elusive to monosubstituted anilines owing to fast back-electron transfer (BET). Here we demonstrate that BET can be minimised by using photoredox catalysis in the presence of an exogenous alkylamine. This approach synergistically aids aniline SET oxidation and then accelerates the following deprotonation. In this way, the generation of α-anilinoalkyl radicals is now possible and these species can be used in a general sense to achieve divergent sp3 C?H functionalization.
Ruthenium(II) complexes with chelating n-heterocyclic carbenes and a ruthenate(II) complex as catalysts for the anti-Markovnikov hydroaminations of styrene
?elikal, ?zlem ?zero?lu,G?k, Yetkin,Yi?it, Beyhan,Yi?it, Murat
, (2021/09/03)
New ruthenium chelate and ruthenate complexes were synthesized through the reaction of benzimidazolium salts and [RuCl2(p-cymene)]2 in toluene and characterized by elemental analysis, 1H NMR and 13C NMR spectroscopy. These ruthenium complexes were tested as catalysts in the intermolecular hydroamination reactions between styrene with aromatic amines in ionic liquid. All of these complexes tested here showed good catalytic activity in these reactions. The hydroamination reactions regioselectively produced anti-Markovnikov addition products in moderate to good yields by using 1 mol% of the ruthenium complex.
Synthesis ofN-aryl amines enabled by photocatalytic dehydrogenation
Kim, Jungwon,Kim, Siin,Choi, Geunho,Lee, Geun Seok,Kim, Donghyeok,Choi, Jungkweon,Ihee, Hyotcherl,Hong, Soon Hyeok
, p. 1915 - 1923 (2021/02/22)
Catalytic dehydrogenation (CD)viavisible-light photoredox catalysis provides an efficient route for the synthesis of aromatic compounds. However, access toN-aryl amines, which are widely utilized synthetic moieties,viavisible-light-induced CD remains a significant challenge, because of the difficulty in controlling the reactivity of amines under photocatalytic conditions. Here, the visible-light-induced photocatalytic synthesis ofN-aryl amines was achieved by the CD of allylic amines. The unusual strategy using C6F5I as an hydrogen-atom acceptor enables the mild and controlled CD of amines bearing various functional groups and activated C-H bonds, suppressing side-reaction of the reactiveN-aryl amine products. Thorough mechanistic studies suggest the involvement of single-electron and hydrogen-atom transfers in a well-defined order to provide a synergistic effect in the control of the reactivity. Notably, the back-electron transfer process prevents the desired product from further reacting under oxidative conditions.