ChemInform Abstract: Synthesis of Pyridinium Salts by Reaction of α,β-Unsaturated Ketones, Primary Amines and Compounds with Mobile Hydrogen Atoms.

1986 ◽  
Vol 17 (1) ◽  
Author(s):  
V. A. KAMINSKII ◽  
G. YA. SHEVCHUK ◽  
M. N. TILICHENKO
Keyword(s):  
Primary Amines ◽  
Pyridinium Salts ◽  
Hydrogen Atoms ◽  
Unsaturated Ketones ◽  
Mobile Hydrogen

Transformation of Primary Amines to Thiols, Sulfides, or Arylmethyl Thiocyanates via Pyridinium Salts

Synthesis ◽  
1982 ◽  
Vol 1982 (06) ◽  
pp. 472-475 ◽  
Author(s):  
P. Molina ◽  
M. Alajarin ◽  
A. Ferao ◽  
M. J. Lidon ◽  
P. M. Fresneda ◽  
...  
Keyword(s):  
Primary Amines ◽  
Pyridinium Salts

scholarly journals Nickel-catalyzed C–N bond activation: activated primary amines as alkylating reagents in reductive cross-coupling

2019 ◽  
Vol 10 (16) ◽  
pp. 4430-4435 ◽  
Author(s):  
Huifeng Yue ◽  
Chen Zhu ◽  
Li Shen ◽  
Qiuyang Geng ◽  
Katharina J. Hock ◽  
...  
Keyword(s):  
Nickel Catalyst ◽  
Bond Activation ◽  
Cross Coupling ◽  
Aryl Halides ◽  
Primary Amines ◽  
Pyridinium Salts ◽  
Reaction Conditions ◽  
Alkyl Amines ◽  
Alkylating Reagents

The reductive cross coupling of pyridinium salts derived from readily available primary alkyl amines with aryl halides has been achieved under mild reaction conditions using a nickel catalyst.

Sterically Crowded Heterocycles. IX. New α,β-Unsaturated Ketones Containing Imidazo[1,2-a]quinoline, Imidazo[2,1-a]isoquinoline, Benzo[h]imidazo[1,2-a]quinoline and Imidazo[1,2-a]-1,10-phenanthroline Moieties

1997 ◽  
Vol 62 (10) ◽  
pp. 1599-1611 ◽  
Author(s):  
Stanislav Böhm ◽  
Tomáš Strnad ◽  
Iveta Ruppertová ◽  
Josef Kuthan
Keyword(s):  
Quantum Chemical ◽  
Pyridinium Salts ◽  
Energy Data ◽  
Axial Chirality ◽  
Unsaturated Ketones ◽  
Pm3 Method ◽  
Quaternary Pyridinium Salts

(Z)-1,3-Diphenyl-3-(2-phenylimidazo[1,2-a]heteroaryl)prop-2-en-1-ones 2-6 and isomeric [1-heteroaryl-3,5-diphenylpyrrol-2-yl]phenylmethanones 17-20 were prepared by the ferricyanide oxidation of quaternary pyridinium salts 12-16. Axial chirality and helicity of the molecules of 4 and 6 are discussed using various energy data obtained by the quantum chemical PM3 method.

Formation of Hydrogen-Related Shallow Donors in Ge1-xSix Crystals Implanted with Protons

2007 ◽  
Vol 131-133 ◽  
pp. 131-136 ◽  
Author(s):  
Yurii M. Pokotilo ◽  
Alla N. Petukh ◽  
Valentin V. Litvinov ◽  
Vladimir P. Markevich ◽  
Nikolay V. Abrosimov ◽  
...  
Keyword(s):  
Maximum Concentration ◽  
Heat Treatments ◽  
Implantation Dose ◽  
Hydrogen Atoms ◽  
Temperature Range ◽  
Impurity Atoms ◽  
Shallow Donors ◽  
Mobile Hydrogen ◽  
Defect Reactions ◽  
Si Content

It is found that shallow hydrogen-related donors are formed in proton-implanted dilute Ge1-хSiх alloys (0 ≤ x ≤ 0.031) as well as in Si-free Ge samples upon heat-treatments in the temperature range 225-300oC. The maximum concentration of the donors is about 1.5×1016 cm-3 for a H+ implantation dose of 1×1015 cm-2. The temperature range of formation of the protonimplantation- induced donors is the same in Ge1-xSix samples with different Si concentration. However, the increase in Si content results in a decrease of the concentration of the hydrogenrelated donors. It is argued that the H-related donors could be complexes of Ge-self-interstitials with hydrogen atoms. The observed decrease in the concentration of the donors with an increase in Si content in the Ge1-xSix samples is associated with interactions of mobile hydrogen atoms with Si impurity atoms. Such interactions reduce the number of implanted hydrogen atoms that can be involved in defect reactions resulting in the formation of H-related shallow donors.

ChemInform Abstract: Zincke′s Reaction with Chiral Primary Amines: A Practical Entry to Pyridinium Salts of Interest in Asymmetric Synthesis.

ChemInform ◽  
2010 ◽  
Vol 23 (46) ◽  
pp. no-no
Author(s):  
Y. GENISSON ◽  
C. MARAZANO ◽  
M. MEHMANDOUST ◽  
D. GNECCO ◽  
B. C. DAS
Keyword(s):  
Asymmetric Synthesis ◽  
Primary Amines ◽  
Pyridinium Salts
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