scholarly journals Synthesis of new condensed coumarin derivatives

2007 ◽  
Vol 5 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Stojadin Dekic ◽  
Vidoslav Dekic ◽  
Branimirka Vucic ◽  
Biljana Dekic ◽  
Milan Dekic
Keyword(s):  
Acid Hydrolysis ◽  
Nmr Spectra ◽  
Proton Nmr ◽  
Catalytic Amount ◽  
The Novel ◽  
Coumarin Derivatives ◽  
Elemental Analyses

Reactions of 4-chloro-2-oxo-2H-chromene-3-carbonitrile (1) with 4-methylpyridin- 2-ylamine (2) and 6-methoxy-benzothiazol-2-ylamine (3) in acetonitrile containing a catalytic amount of triethylamine gave the new coumarin derivatives 7-imino-10-methyl-7H- 5-oxa-7a,12-diaza-benzo[a]anthracen-6-one (4) and 7-imino-10-methoxy-7H-5-oxa-12- thia-7a,13-diaza-indeno[1,2-b]phenanthren-6-one (5) in 52 and 39% yields, respectively. The novel compounds were subjected to acid hydrolysis giving the corresponding oxoderivatives 10-methyl-5-oxa-7a,12-diaza-benzo[a]anthracene-6,7-dione (6) and 10- methoxy-5-oxa-12-thia-7a,13-diaza-indeno[1,2-b]phenanthrene-6,7-dione (7) in 64 and 58% yields, respectively. The structural assignments of the synthesized compounds were based on elemental analyses, IR and proton NMR spectra. .

Synthesis of new condensed and cyclized coumarin derivatives

2007 ◽  
Vol 61 (3) ◽  
Author(s):  
S. Dekić ◽  
V. Dekić ◽  
B. Dekić ◽  
M. Dekić
Keyword(s):  
Acid Hydrolysis ◽  
Intramolecular Cyclization ◽  
13C Nmr ◽  
Catalytic Amount ◽  
The Novel ◽  
Coumarin Derivatives ◽  
1H And 13C Nmr

AbstractCondensation of 4-chloro-2-oxo-2H-chromene-3-carbonitrile with selected heteroarylamines in acetonitrile containing a catalytic amount of triethylamine, followed by intramolecular cyclization, gave the new coumarin derivatives with yields ranging from 43 % to 78 %. The novel compounds were subjected to acid hydrolysis giving the corresponding oxo derivatives in 66–70 % yield. The structural assignments of the synthesized compounds were based on elemental, IR, 1H and 13C NMR analyses.

scholarly journals Design, Synthesis, Antibacterial and Antifungal Activity of Novel 2-[(E)-2-aryl-1-ethenyl]-3-(2-sulfanyl-1H-benzo[d]imidazole-5-yl)-3,4- dihydro-4-quinolinones

2012 ◽  
Vol 9 (3) ◽  
pp. 1481-1489
Author(s):  
Anisetti Ravinder Nath ◽  
Malladi Srinivas Reddy
Keyword(s):  
Antifungal Activity ◽  
Knoevenagel Condensation ◽  
Catalytic Amount ◽  
The Novel ◽  
Plate Method ◽  
Design Synthesis ◽  
H Nmr ◽  
Elemental Analyses ◽  
Antimicrobial And Antifungal Activity ◽  
Antibacterial And Antifungal

The novel 2-[(E)-2-aryl-1-ethenyl]-3-(2-sulfanyl-1H-benzo[d]imidazole-5-yl)-3,4- dihydro-4-quinolinones (4a-j) analogs were synthesized by Knoevenagel condensation of a solution of 2-methyl-3-(2-sulfanyl-1H-benzo[d]imidazole-5-yl)-3,4-dihydro-4-quinazolinone (3) with aromatic aldehyde in presence of catalytic amount of piperidine. Compounds (4a-j) showed significant biological activity against all the standard strains. All the synthesized compounds were characterized on the basis of their IR,1H NMR, MASS spectroscopic data and elemental analyses. All the compounds have been tested for antimicrobial and antifungal activity by the cup-plate method.

Analysis of proton NMR spectra of 1-phospha-2,6-dioxacyclohexanes

1971 ◽  
Vol 4 (1) ◽  
pp. 123-135 ◽  
Author(s):  
D.W White ◽  
G.K McEwen ◽  
R.D Bertrand ◽  
J.G Verkade
Keyword(s):  
Nmr Spectra ◽  
Proton Nmr

ChemInform Abstract: MASS-SPECTROMETRIC BEHAVIOR AND PROTON NMR SPECTRA OF 9-(2-R-1,3-DIOXAN-5-YL)PURINES

1984 ◽  
Vol 15 (43) ◽  
Author(s):  
YU. YU. SAMITOV ◽  
I. N. GONCHAROVA ◽  
N. P. RAMZAEVA ◽  
P. B. TERENT'EV
Keyword(s):  
Nmr Spectra ◽  
Proton Nmr ◽  
Mass Spectrometric ◽  
Mass Spectrometric Behavior

ChemInform Abstract: SYNTHESIS AND PROTON NMR SPECTRA OF ORGANOCYCLOTETRASILAZANES

1980 ◽  
Vol 11 (16) ◽  
Author(s):  
K. A. ANDRIANOV ◽  
A. A. ZHDANOV ◽  
B. A. ASTAPOV ◽  
B. D. LAVRUKHIN ◽  
T. V. STRELKOVA ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
Proton Nmr
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