Synthesis of 5-alkyl-3H-thiolen-2-ones and 5-alkyl-3H-furan-2-ones and condensation reactions at the heterocyclic methylene group

1987 ◽  
Vol 23 (4) ◽  
pp. 377-380 ◽  
Author(s):  
V. A. Sedavkina ◽  
N. A. Morozova ◽  
A. Yu. Egorova ◽  
I. G. Ostroumov
Keyword(s):  
Condensation Reactions ◽  
Methylene Group

Condensation reactions involving the ?-methylene group in series of 5-alkylpyrrolidine-2-thiones and 5-alkyl-1-acetyl-2-pyrrolidones

1987 ◽  
Vol 23 (9) ◽  
pp. 951-953
Author(s):  
G. V. Bespalova ◽  
V. A. Sedavkina ◽  
V. G. Kharchenko ◽  
A. D. Shebaldova ◽  
V. I. Labunskaya
Keyword(s):  
Condensation Reactions ◽  
In Series ◽  
Methylene Group

ChemInform Abstract: Condensation Reactions at the α-Methylene Group in the 5-Alkylpyrrolidine-2-thione and 5-Alkyl-1-acetyl-2-pyrrolidone Series.

ChemInform ◽  
1988 ◽  
Vol 19 (15) ◽  
Author(s):  
G. V. BESPALOVA ◽  
V. A. SEDAVKINA ◽  
V. G. KHARCHENKO ◽  
A. D. SHEBALDOVA ◽  
V. I. LABUNSKAYA
Keyword(s):  
Condensation Reactions ◽  
Methylene Group

Condensation Reactions at the Methylene Group of 1-(4-Nitrophenyl)pyrrolin-2-one and 1-(4-Nitrophenyl)pyrrolin-2-onium Perchlorate.

ChemInform ◽  
2007 ◽  
Vol 38 (17) ◽  
Author(s):  
M. A. Sibiryakova ◽  
G. F. Muzychenko ◽  
T. P. Kosulina ◽  
K. S. Pushkareva
Keyword(s):  
Condensation Reactions ◽  
Methylene Group

Condensation reactions at the methylene group of 1-(4-nitrophenyl)-pyrrolin-2-one and 1-(4-nitrophenyl)-pyrrolin-2-onium perchlorate

2006 ◽  
Vol 42 (7) ◽  
pp. 875-881 ◽  
Author(s):  
M. A. Sibiryakova ◽  
G. F. Muzychenko ◽  
T. P. Kosulina ◽  
K. S. Pushkareva
Keyword(s):  
Condensation Reactions ◽  
Methylene Group

Condensation Reactions of 1,2,3,4-Tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde

1995 ◽  
Vol 60 (4) ◽  
pp. 605-611 ◽  
Author(s):  
Pavel Bobáľ ◽  
Roman Gažo ◽  
Rudolf Kada ◽  
Dušan Ilavský ◽  
Naďa Prónayová ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Mass Spectra ◽  
H Nmr ◽  
Condensation Reactions ◽  
Active Methylene ◽  
Methylene Group ◽  
C Nmr

Condensation reactions of 1,2,3,4-tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde with nine acid derivatives containing an active methylene group are described. The obtained products were characterized by their IR, UV, 1H NMR, 13C NMR and mass spectra. The stereochemistry of selected products was studied by 1H and 13C NMR spectroscopy.

Knoevenagel Condensation Reactions of Cyano Malononitrile-Derivatives Under Microwave Radiation

2018 ◽  
Vol 22 (6) ◽  
pp. 519-532 ◽  
Author(s):  
Lucas Lima Zanin ◽  
David Esteban Quintero Jimenez ◽  
Luis Pina Fonseca ◽  
Andre Luiz Meleiro Porto
Keyword(s):  
Microwave Radiation ◽  
Knoevenagel Condensation ◽  
Condensation Reactions

EHT study of reactivity of methylene group in 1-methyl-1,4-dihydronicotinamide

1980 ◽  
Vol 45 (9) ◽  
pp. 2425-2432
Author(s):  
Jiří Krechl ◽  
Josef Kuthan
Keyword(s):  
Heterocyclic Ring ◽  
Covalent Bonds ◽  
Electronic Mechanism ◽  
Methylene Group ◽  
Plane Form ◽  
Reaction Profile

It has been demonstrated that the EHT method predicts an almost plane form of the heterocyclic ring in 1-methyl-1,4-dihydronicotinamide I (R = CH3) and also reflects satisfactorily character of the covalent bonds in the 4-methylene group. An attempt has been made of calculation of the reaction profile of elimination of the centre 4', and electronic mechanism of its splitting off is discussed.

Influence of Metal Core Composition on Redox Properties and Photoreactivity of the Clusters [H4-xRu4-xRhx(CO)12] (x = 0, 2, 3, 4)

2001 ◽  
Vol 66 (7) ◽  
pp. 1062-1077 ◽  
Author(s):  
Maarten J. Bakker ◽  
Tapani A. Pakkanen ◽  
František Hartl
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Reduction ◽  
Redox Properties ◽  
Metal Core ◽  
Loss Product ◽  
Condensation Reactions ◽  
Core Composition ◽  
Co Dissociation ◽  
Major Reduction

Electrochemical properties of tetrahedral clusters [H2Ru2Rh2(CO)12], [HRuRh3(CO)12] and [Rh4(CO)12] were investigated in order to evaluate the influence of metal core composition in the series [H4-xRu4-xRhx(CO)12] (x = 0-4). The cluster [H3Ru3Rh(CO)12] was not available in sufficient quantities. As reported for [H4Ru4(CO)12], electrochemical reduction of the hydride-containing clusters [H2Ru2Rh2(CO)12] and [HRuRh3(CO)12] also results in (stepwise) loss of hydrogen, producing the anions [HRu2Rh2(CO)12]-, [Ru2Rh2(CO)12]2- and [RuRh3(CO)12]-. These anions can also be prepared from the neutral parent clusters via chemical routes. Electrochemical reduction of [Rh4(CO)12] does not result in the formation of any stable tetranuclear anion. Instead, [Rh5(CO)15]- and [Rh6(CO)15]2- are the major reduction products detected in the course of IR spectroelectrochemical experiments. Most likely, these cluster species are formed from the secondary CO-loss product [Rh4(CO)11]2- by fast redox condensation reactions. Their reoxidation regenerates parent [Rh4(CO)12], together with some [Rh6(CO)16]. Unlike [H4Ru4(CO)12] that undergoes photochemical CO-dissociation, [H2Ru2Rh2(CO)12] and [Rh4(CO)12] are completely photostable in neat hexane and dichloromethane as well as in the presence of oct-1-ene.

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