38161-07-8Relevant academic research and scientific papers
Heterogeneous Catalytic Reduction of Tertiary Amides with Hydrosilanes Using Unsupported Nanoporous Gold Catalyst
Zhao, Yuhui,Zhang, Sheng,Yamamoto, Yoshinori,Bao, Ming,Jin, Tienan,Terada, Masahiro
supporting information, p. 4817 - 4824 (2019/10/28)
We have demonstrated that the unsupported nanoporous gold (AuNPore) was a green and highly efficient heterogeneous catalyst for the reduction of amides to amines using hydrosilanes as reductants. A variety of tertiary amides with a broad functional groups were reduced to the corresponding tertiary amines in the presence of 2 mol% of AuNPore and PheMe2SiH or (Me2SiH)2O under mild conditions. AuNPore catalyst was recovered by simple filtration and used for twelve times without any loss of catalytic activity. The AuNPore/hydrosilane system was also successfully applied to the hydrosilative reduction of sulfoxides and N-oxides. (Figure presented.).
A convenient synthesis of deuterium labeled amines and nitrogen heterocycles with KOt-Bu/DMSO-d6
Hu, Yu,Liang, Liang,Wei, Wen-Tao,Sun, Xiang,Zhang, Xue-Jing,Yan, Ming
, p. 1425 - 1430 (2015/02/19)
H/D exchanges of arylmethyl amines and nitrogen heterocycles were conveniently achieved with KOt-Bu/DMSO-d6. The method is also applicable for phenyl benzyl ethers, diarylmethanes, and alkyl arenes. These H/D exchange reactions are suggested to
Selective reduction of amides to amines by boronic acid catalyzed hydrosilylation
Li, Yuehui,Molina De La Torre, Jesus A.,Grabow, Kathleen,Bentrup, Ursula,Junge, Kathrin,Zhou, Shaolin,Brueckner, Angelika,Beller, Matthias
supporting information, p. 11577 - 11580 (2013/11/06)
Not a 'B'ore! Benzothiophene-based boronic acids catalyze the reduction of tertiary, secondary, and primary amides in the presence of a hydrosilane. The reaction demonstrates good functional-group tolerance. Copyright
Zinc-catalyzed reduction of amides: Unprecedented selectivity and functional group tolerance
Das, Shoubhik,Addis, Daniele,Zhou, Shaolin,Junge, Kathrin,Beller, Matthias
supporting information; experimental part, p. 1770 - 1771 (2010/04/25)
(Chemical Equation Presented) A novel zinc-catalyzed reduction of tertiary amides was developed. This system shows remarkable chemoselectivity and substrate scope tolerating ester, ether, nitro, cyano, azo, and keto substituents. Copyright
Oxygenation of benzyldimethylamine by singlet oxygen. Products and mechanism
Baciocchi, Enrico,Del Giacco, Tiziana,Lapi, Andrea
, p. 4791 - 4794 (2007/10/03)
(Chemical Equation Presented) A product study of the reaction of benzyldimethylamine (1) with thermally and photochemically generated 1O2 in MeCN was carried out. Benzaldehyde and N-benzyl-N-methylformamide are the reaction products, oxygenation representing ca. 9% of the overall quenching of 1O2 by 1. The temperature effect and the intermolecular and intramolecular kinetic deuterium isotope effects were also determined. It is suggested that the products derive from an intracomplex hydrogen atom transfer in a reversibly formed charge-transfer complex.
Hypervalent ammonium radicals. Effects of alkyl groups and aromatic substituents
Shaffer, Scott A.,Sadilek, Martin,Turecek, Frantisek
, p. 5234 - 5245 (2007/10/03)
Neutralization by collisional electron transfer of gaseous benzylalkylammonium ions produces transient hypervalent radicals whose dissociations depend on the substituents in the aromatic ring and at the amine nitrogen atom. Benzylammonium radical, C6
Azetidines. 5. Reaction of 1,1,3,3-Tetramethyl- and 1-Benzyl-1,3,3-trimethylazetidinium Ions with Butyllithium and Phenyllithium. Deuterium Labeling as a Mechanistic Probe
Wills, Max T.,Wills, Irene E.,Dollen, Lawrence Von,Butler, Barry L.,Porter, John,Anderson, Arthur G.
, p. 2489 - 2498 (2007/10/02)
The reactions of 1,1,3,3-tetramethylazetidinium iodide (1) and 1-benzyl-1,3,3-trimethylazetidinium bromide (7) with butyllithium and with phenyllithium were studied in ether.The products from the reaction of 1 with butyllithium were 1,3,3-trimethylpyrrolidine (2), 3,3-dimethyl-4-(methylamino)-1-butene (3), 1-(dimethylamino)-2,2-dimethylheptane (4), neopentylpyrrolidine (5), and 1-(dimethylamino)-2,2-dimethylcyclopropane (6).With phenyllithium, 1 gave 2 and 1-(dimethylamino)-2,2-dimethyl-3-phenylpropane (11).With butyllithium, 7 gave 2-phenyl-1,4,4-trimethylpyrrolidine (8), 1-benzyl-3,3-dimethylpyrrolidine (9), and 1-neopentyl-2-phenylpyrrolidine (10).The reaction of phenyllithium with 7 gave only 8 and 9.Mechanistic information was obtained by labeling 1 with deuterium in three different ways: N-methyl-d3, 2,2-d2, and N-methyl-d3-2,2-d2.A primary kinetic isotope effect of 9.4 was found for the formation of 2 from 1-N-methyl-d3.When 2 was formed from 1-2,2-d2, a secondary kinetic isotope effect of 1.17 was measured.The formation of 4 from 1-2,2-d2 was accompanied by a primary kinetic isotope effect of 4.7, suggesting a carbene intermediate.Ylide carbanions involving decomposition to a carbene carbanion in the formation of 3 and an azomethine ylide in the formation of 5 and 9 are probable intermediates.It is postulated that the azomethine ylides react with ethylene formed from the reaction of butyllithium with the solvent ether by means of a concerted (4 + 2) cycloaddition reaction.A primary kinetic isotope effect of 20 was found for the formation of pentylbenzene from dibenzyldimethylammonium bromide and butyllithium.
