Phosphorus Sulfur and Silicon and The Related Elements, 2007
4-Chlorobenzo[h]quinolin-2(1H)-one (4) and its 4-sulfanyl derivative 6 were smoothly obtained via... more 4-Chlorobenzo[h]quinolin-2(1H)-one (4) and its 4-sulfanyl derivative 6 were smoothly obtained via chlorination, hydrolysis, and sulfurization starting with 4-hydroxybenzo-[h]quinolin-2(1H)- one (1). Heterocyclization reaction of compound 6 with chloroacetaldehyde diethylacetal, ...
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Phosphorus Sulfur and Silicon and The Related Elements, 2011
The four-membered spiro-heterocycles ethyl cyano(1-methyl-2,4-dioxospiro{1,3-quinoline-3,4′-[1,3]... more The four-membered spiro-heterocycles ethyl cyano(1-methyl-2,4-dioxospiro{1,3-quinoline-3,4′-[1,3]dithietane}-4′-ylidene)-acetate 2a, -malononitrile 2b, -acetylacetone 2c, and thiazetidine isomer 3 were prepared under phase transfer catalysis (PTC) conditions. The thermal treatment of dithietanes 2a–c led to the bis-quinolinyl sulfide 4. Some interesting nucleophilic additions followed by cyclization reactions were carried out with the dithietane 2a to give the corresponding novel dispiro derivatives 5–8, 10–13, and 15.Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.GRAPHICAL ABSTRACT
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Phosphorus Sulfur and Silicon and The Related Elements, 2000
2,4-Dihalo-8-methylqulnolines 2,3 have been prepared and subjected to azidation and hydrazination... more 2,4-Dihalo-8-methylqulnolines 2,3 have been prepared and subjected to azidation and hydrazination reactions showing interesting regioselective properties to give compounds 4-10. The targeted aminoquiolines 13, 14, 15, 17, 19, 22 and 23 were obtained via hydrolysis of their corresponding phosphazenes 11, 12, 16, 18, 20 and 21, respectively. These phosphazenes have been preliminary obtained by condensation of azido and/or tetrazoloquinolines 4,
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
INTRODUCTION Recently, a convenient new synthesis of 2-chloro-4H-pyrido[1,2-a]pyrimi-din-4-one (1... more INTRODUCTION Recently, a convenient new synthesis of 2-chloro-4H-pyrido[1,2-a]pyrimi-din-4-one (1) was described.1 It is well-known that this type of α-halohetero-cyclic compounds are susceptible to synthetically important nucleophilic substi-tutions.25 Many ...
Reactivity of 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (I) towards N- and C-nucl... more Reactivity of 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (I) towards N- and C-nucleophiles was described. A series of new enaminones II–III, Schiff’s base IV, and hydrazinomethylenediketones V–VIII and X were prepared in good yields. Cyclization of compounds X was achieved by an action of acetic acid to give pyrazolo[3,4-d]pyrido[1,2-a]pyrimidines XI. Base catalyzed Knoevenagel condensation of aldehyde I with some active methyl and methylene compounds led to a series of chalcone-like derivatives XII, XV, XVII, XX, XXIII, XXV, XXVII, XXIX, XXXI, XXXII, and XXXV, in fair yields. Cyclization of enones XII, XV, and XX with hydrazine gave novel heterocyclyl substituted pyrazoles XIII, XVII, and XXI, respectively. Pyrano[2,3-d]pyrido[1,2-a]pyrimidine-2,5-diones XXXIII, XXXIV, and XXXVI derivatives were obtained via cyclization of their respective enone derivatives.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Abstract 1, 3-Dichlorobenzo [f] quinoline 2 was obtained from 1-hydroxybenzo [f] quinolin-3-one 1... more Abstract 1, 3-Dichlorobenzo [f] quinoline 2 was obtained from 1-hydroxybenzo [f] quinolin-3-one 1. Nucleophilic substitution, hydrolysis, hydrazinolysis and azidation reactions of compound 2 have been studied and found regioselective. Also, 1-aminobenzo [f] ...
Abstract 4-Hydrazino-1-methyl-2 (1 H) quinolinone (2) was treated with chlorophthalazine, nitrous... more Abstract 4-Hydrazino-1-methyl-2 (1 H) quinolinone (2) was treated with chlorophthalazine, nitrous acid, isothiocyanates and isatines, and also utilized as'a precursor for some new 4-pyrazolylquinolinones. Reaction of 2 with certain 3-acylquinolinones afforded ...
Phosphorus Sulfur and Silicon and The Related Elements, 2007
4-Chlorobenzo[h]quinolin-2(1H)-one (4) and its 4-sulfanyl derivative 6 were smoothly obtained via... more 4-Chlorobenzo[h]quinolin-2(1H)-one (4) and its 4-sulfanyl derivative 6 were smoothly obtained via chlorination, hydrolysis, and sulfurization starting with 4-hydroxybenzo-[h]quinolin-2(1H)- one (1). Heterocyclization reaction of compound 6 with chloroacetaldehyde diethylacetal, ...
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Phosphorus Sulfur and Silicon and The Related Elements, 2011
The four-membered spiro-heterocycles ethyl cyano(1-methyl-2,4-dioxospiro{1,3-quinoline-3,4′-[1,3]... more The four-membered spiro-heterocycles ethyl cyano(1-methyl-2,4-dioxospiro{1,3-quinoline-3,4′-[1,3]dithietane}-4′-ylidene)-acetate 2a, -malononitrile 2b, -acetylacetone 2c, and thiazetidine isomer 3 were prepared under phase transfer catalysis (PTC) conditions. The thermal treatment of dithietanes 2a–c led to the bis-quinolinyl sulfide 4. Some interesting nucleophilic additions followed by cyclization reactions were carried out with the dithietane 2a to give the corresponding novel dispiro derivatives 5–8, 10–13, and 15.Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.GRAPHICAL ABSTRACT
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Phosphorus Sulfur and Silicon and The Related Elements, 2000
2,4-Dihalo-8-methylqulnolines 2,3 have been prepared and subjected to azidation and hydrazination... more 2,4-Dihalo-8-methylqulnolines 2,3 have been prepared and subjected to azidation and hydrazination reactions showing interesting regioselective properties to give compounds 4-10. The targeted aminoquiolines 13, 14, 15, 17, 19, 22 and 23 were obtained via hydrolysis of their corresponding phosphazenes 11, 12, 16, 18, 20 and 21, respectively. These phosphazenes have been preliminary obtained by condensation of azido and/or tetrazoloquinolines 4,
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
INTRODUCTION Recently, a convenient new synthesis of 2-chloro-4H-pyrido[1,2-a]pyrimi-din-4-one (1... more INTRODUCTION Recently, a convenient new synthesis of 2-chloro-4H-pyrido[1,2-a]pyrimi-din-4-one (1) was described.1 It is well-known that this type of α-halohetero-cyclic compounds are susceptible to synthetically important nucleophilic substi-tutions.25 Many ...
Reactivity of 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (I) towards N- and C-nucl... more Reactivity of 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (I) towards N- and C-nucleophiles was described. A series of new enaminones II–III, Schiff’s base IV, and hydrazinomethylenediketones V–VIII and X were prepared in good yields. Cyclization of compounds X was achieved by an action of acetic acid to give pyrazolo[3,4-d]pyrido[1,2-a]pyrimidines XI. Base catalyzed Knoevenagel condensation of aldehyde I with some active methyl and methylene compounds led to a series of chalcone-like derivatives XII, XV, XVII, XX, XXIII, XXV, XXVII, XXIX, XXXI, XXXII, and XXXV, in fair yields. Cyclization of enones XII, XV, and XX with hydrazine gave novel heterocyclyl substituted pyrazoles XIII, XVII, and XXI, respectively. Pyrano[2,3-d]pyrido[1,2-a]pyrimidine-2,5-diones XXXIII, XXXIV, and XXXVI derivatives were obtained via cyclization of their respective enone derivatives.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Abstract 1, 3-Dichlorobenzo [f] quinoline 2 was obtained from 1-hydroxybenzo [f] quinolin-3-one 1... more Abstract 1, 3-Dichlorobenzo [f] quinoline 2 was obtained from 1-hydroxybenzo [f] quinolin-3-one 1. Nucleophilic substitution, hydrolysis, hydrazinolysis and azidation reactions of compound 2 have been studied and found regioselective. Also, 1-aminobenzo [f] ...
Abstract 4-Hydrazino-1-methyl-2 (1 H) quinolinone (2) was treated with chlorophthalazine, nitrous... more Abstract 4-Hydrazino-1-methyl-2 (1 H) quinolinone (2) was treated with chlorophthalazine, nitrous acid, isothiocyanates and isatines, and also utilized as'a precursor for some new 4-pyrazolylquinolinones. Reaction of 2 with certain 3-acylquinolinones afforded ...
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