87245-79-2Relevant academic research and scientific papers
Spin-Echo (13)C NMR spectroscopy for the Analysis of Deuterated Carbon Compounds
Wesener, J. R.,Schmitt, P.,Guenther, H.
, p. 10 - 13 (1984)
J modulation of (13)C spin-echo signals is used to develop a strategy for the analysis of deuterated carbon compounds, with the aim to distinguish (13)C NMR signals of quaternary carbons, CH, CH2, CH3, CHD, CH2D, CHD2, CD, CD2, and CD3 groups.Three different experimental approaches are discussed: (1) spin-echo modulation by 1J without (2)H decoupling as the simplest method available; (2) spin-echo modulation by either 1J or 1J with simultaneous (1)H and (2)H decoupling ; (3) the combination of two (13)C spin-echo sequences with gated (1)H as well as (2)H decoupling finally leading to TANDEM-SEFT, a pulse sequence that provides the most general approach to the analysis of labeled carbon sites in organic molecules.
Method for selective deuteration of benzyl-position carbon hydrogen bond of aromatic ring
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Paragraph 0049-0051, (2021/10/30)
The invention discloses a method for selective deuteration of benzyl-position carbon hydrogen bonds of aromatic rings. To the method, η is carried out on an aromatic ring by using a metal rhodium catalyst. 6 The coordination is activated so tha
Regiodivergent DH or HD Addition to Alkenes: Deuterohydrogenation versus Hydrodeuterogenation
Hilt, Gerhard,Li, Luomo
supporting information, (2020/03/03)
The regioselective and regiodivergent addition of H-D to a variety of 1,1-diarylalkenes was realized utilizing selectively deuterated dihydroaromatic compounds, which were generated by cobalt catalysis. The reaction was initiated by catalytic amounts of B
Generalized Chemoselective Transfer Hydrogenation/Hydrodeuteration
Wang, Yong,Cao, Xinyi,Zhao, Leyao,Pi, Chao,Ji, Jingfei,Cui, Xiuling,Wu, Yangjie
supporting information, p. 4119 - 4129 (2020/08/10)
A generalized, simple and efficient transfer hydrogenation of unsaturated bonds has been developed using HBPin and various proton reagents as hydrogen sources. The substrates, including alkenes, alkynes, aromatic heterocycles, aldehydes, ketones, imines, azo, nitro, epoxy and nitrile compounds, are all applied to this catalytic system. Various groups, which cannot survive under the Pd/C/H2 combination, are tolerated. The activity of the reactants was studied and the trends are as follows: styrene'diphenylmethanimine'benzaldehyde'azobenzene'nitrobenzene'quinoline'acetophenone'benzonitrile. Substrates bearing two or more different unsaturated bonds were also investigated and transfer hydrogenation occurred with excellent chemoselectivity. Nano-palladium catalyst in situ generated from Pd(OAc)2 and HBPin extremely improved the TH efficiency. Furthermore, chemoselective anti-Markovnikov hydrodeuteration of terminal aromatic olefins was achieved using D2O and HBPin via in situ HD generation and discrimination. (Figure presented.).
Regioselective Transfer Hydrodeuteration of Alkenes with a Hydrogen Deuteride Surrogate Using B(C6F5)3 Catalysis
Walker, Johannes C. L.,Oestreich, Martin
supporting information, p. 6411 - 6414 (2018/10/20)
A regioselective hydrodeuteration of alkenes using monodeuterated cyclohexa-1,4-dienes as surrogates for hydrogen deuteride (HD) gas is reported. The metal-free process proceeds under B(C6F5)3 catalysis presumably by deuteride abstraction to form borodeuteride [DB(C6F5)3]a and highly Br?nsted-acidic Wheland intermediates. Low catalyst loadings (2.5 mol %) are used, and the reaction proceeds at room temperature.
Investigation of the mechanism of decyanation of 2,2-diphenylpropionitrile induced by LiAlH4
Mattalia, Jean-Marc,Bodineau, Nicolas,Negrel, Jean-Claude,Chanon, Michel
, p. 233 - 236 (2007/10/03)
The LiAlH4 reduction of 2,2-diphenylpropionitrile (4) in THF yields a mixture of the hycrocarbon 6 and the expected amine 5. Medium effects and reduction with LiAID4 suggest a mechanism involving the attack of the hydride reagent on the cyano carbon atom followed by the fragmentation of the formed imine salt intermediate. Copyright
Generation, entrapment and reactivity of long-lived organic carbocations and radical cations within a supramolecular assembly: Ca Y zeolite
Pitchumani,Lakshminarasimhan,Prevost, Nicolette,Corbin,Ramamurthy
, p. 181 - 182 (2007/10/03)
Diarylethenes spontaneously form the corresponding radical cations and carbocations upon inclusion within activated Ca Y zeolite; oxygen plays an important role in the generation of the radical cations.
