ChemInform Abstract: A Facile Synthetic Method for Fluorine-Containing 1,7-Phenanthrolines: Pyridine-Ring Formation Reaction of N-Propargyl-6,8-bis(trifluoroacetyl)quinolin-5-amine with Various Nucleophiles.

ChemInform ◽  
2010 ◽  
Vol 41 (6) ◽  
Author(s):  
Dai Shibata ◽  
Etsuji Okada ◽  
Mamoru Hinoshita ◽  
Maurice Medebielle
Keyword(s):  
Pyridine Ring ◽  
Ring Formation ◽  
Synthetic Method ◽  
Formation Reaction

scholarly journals Concise synthesis of 3-alkylthieno[3,2-b]thiophenes; building blocks for organic electronic and optoelectronic materials

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38407-38413 ◽  
Author(s):  
Koray T. Ilhan ◽  
Sebahat Topal ◽  
Mehmet S. Eroglu ◽  
Turan Ozturk
Keyword(s):  
Building Blocks ◽  
Ring Formation ◽  
Optoelectronic Materials ◽  
Organic Electronic ◽  
Formation Reaction

Four step synthesis of 3-alkylthieno[3,2-b]thiophenes in the literature was reduced to two steps in good yields, through the preparation of the mono ketone, i.e. 1-(thiophene-3-ylthio)alkan-2-one, from 3-bromothiophene and ring formation reaction.

Cyclic acyl amidines as unexpected C4-donors for fully substituted pyridine ring formation in the base mediated reaction with malononitrile

2019 ◽  
Vol 60 (30) ◽  
pp. 1959-1963 ◽  
Author(s):  
Volodymyr Tkachuk ◽  
Vladyslava Merkulova ◽  
Iryna Omelchenko ◽  
Axelle Arrault ◽  
Olga Hordiyenko
Keyword(s):  
Pyridine Ring ◽  
Ring Formation

scholarly journals Microbial metabolism of the pyridine ring. Formation of pyridinediols (dihydroxypyridines) as intermediates in the degradation of pyridine compounds by micro-organisms

1972 ◽  
Vol 130 (3) ◽  
pp. 879-893 ◽  
Author(s):  
C. Houghton ◽  
R. B. Cain
Keyword(s):  
Energy Source ◽  
Substrate Specificity ◽  
Pyridine Ring ◽  
Microbial Metabolism ◽  
Ring Formation ◽  
Hydroxy Derivative ◽  
Cultural Conditions ◽  
Micro Organisms

1. Several species of micro-organisms that were capable of utilizing pyridine compounds as carbon and energy source were isolated from soil and sewage. Compounds degraded included pyridine and the three isomeric hydroxypyridines. 2. Suitable modifications of the cultural conditions led to the accumulation of pyridinediols (dihydroxypyridines), which were isolated and characterized. 3. Three species of Achromobacter produced pyridine-2,5-diol from 2- or 3-hydroxypyridine whereas an uncommon Agrobacterium sp. (N.C.I.B. 10413) produced pyridine-3,4-diol from 4-hydroxypyridine. 4. On the basis of chemical isolation, induction of the necessary enzymes in washed suspensions and the substrate specificity exhibited by the isolated bacteria, the initial transformations proposed are: 2-hydroxypyridine → pyridine-2,5-diol; 3-hydroxypyridine → pyridine-2,5-diol and 4-hydroxypyridine → pyridine-3,4-diol. 5. A selected pyridine-utilizer, Nocardia Z1, did not produce any detectable hydroxy derivative from pyridine, but carried out a slow oxidation of 3-hydroxypyridine to pyridine-2,3-diol and pyridine-3,4-diol. These diols were not further metabolized. 6. Addition of the isomeric hydroxypyridines to a model hydroxylating system resulted in the formation of those diols predicted by theory.

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