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Heterocyclic Synthesis (heterocyclic + synthesis)
Selected AbstractsChemInform Abstract: Heterocyclic Synthesis with Nitriles: Synthesis of Pyrazolopyrimidine and Pyrazolopyridine Derivatives.CHEMINFORM, Issue 38 2009Abdellatif M. Salaheldin Abstract 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. [source] ChemInform Abstract: Enaminonitriles in Heterocyclic Synthesis: Novel Synthesis of 3-Aminopyrroles and Pyrrolo[3,2-d]pyrimidine Derivatives.CHEMINFORM, Issue 36 2008Abdellatif M. Salaheldin Abstract 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. [source] ChemInform Abstract: Retro-Ene Reactions in Heterocyclic Synthesis.CHEMINFORM, Issue 11 2008Part 5. Abstract 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. [source] N,N-Dialkyl-N,-chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis.CHEMINFORM, Issue 27 2007Part 3. Abstract 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. [source] Pyrazoles as Building Blocks in Heterocyclic Synthesis: Synthesis of Some New Substituted 1-Triazinylpyrazolo[3,4-d]pyrimidine and 1-Triazinylpyrazolo[3,4-b]pyridine Derivatives.CHEMINFORM, Issue 50 2005A.-F. A. Harb No abstract is available for this article. [source] Heterocyclic Synthesis: A Convenient Route to Some 2-Mercapto 1,3,4-Oxadiazole and Green Chemistry Microwave-Induced One-Pot Synthesis of 2-Aryl 1,3,4-Oxadiazole in Quinazolone and Their Antibacterial and Antifungal Activity.CHEMINFORM, Issue 49 2005A. R. Desai Abstract For Abstract see ChemInform Abstract in Full Text. [source] 2-[4-(2-Thienyl)-1,3-thiazol-2-yl]ethanenitrile in Heterocyclic Synthesis of Biological Interest.CHEMINFORM, Issue 48 2005Abdou O. Abdelhamid Abstract For Abstract see ChemInform Abstract in Full Text. [source] N,N-Dialkyl (N,-Chlorosulfonyl)chloroformamidines in Heterocyclic Synthesis.CHEMINFORM, Issue 37 2005Part 1. Abstract For Abstract see ChemInform Abstract in Full Text. [source] Heterocyclic Synthesis via Enaminones: Novel Synthesis of (1H)-Pyridin-2-one, Pyrazolo[1,5-a]pyrimidine and Isoxazole Derivatives Incorporating a N-Methylphthalimide and Their Biological Evaluation.CHEMINFORM, Issue 33 2005Fatima Al-Omran Abstract For Abstract see ChemInform Abstract in Full Text. [source] Alkyl Heterocycles in Heterocyclic Synthesis.CHEMINFORM, Issue 20 2005Part 2. Abstract For Abstract see ChemInform Abstract in Full Text. [source] Enamines in Heterocyclic Synthesis: A Route to 4-Substituted Pyrazoles and Condensed Pyrazoles.CHEMINFORM, Issue 8 2005Huwaida M. E. Hassaneen Abstract For Abstract see ChemInform Abstract in Full Text. [source] 2, 6-Bis[3-N,N-dimethylamino-1-oxopropen-1-yl]pyridine as a Building Block in Heterocyclic Synthesis: Synthesis of 2,2,:6,,2,,-Terpyridines and 2,6-Bis[pyrazolyl, isoxazolyl, diazepinyl, pyrazolo[5,1-c]pyrimidinyl and pyrazolo-[4,3-d]pyridazinyl]pyridines.CHEMINFORM, Issue 7 2005Abu Zeid Abd El Baset Hassanien Abstract For Abstract see ChemInform Abstract in Full Text. [source] Enaminonitrile in Heterocyclic Synthesis: Synthesis and Reactions of Some Pyrimidine Derivatives.CHEMINFORM, Issue 5 2005H. H. Abdel-Razik Abstract For Abstract see ChemInform Abstract in Full Text. [source] Enaminones as Building Blocks in Heterocyclic Synthesis: New Syntheses of Nicotinic Acid and Thienopyridine Derivatives.CHEMINFORM, Issue 44 2004Mervat Mohammed Abdelkhalik Abstract For Abstract see ChemInform Abstract in Full Text. [source] Heterocyclic Synthesis with Ethyl ,-(3-Carbamoyl-4,5,6,7-tetrahydrobenzo [b]thiophen-2-ylhydrazono)acetates: An Expeditious Synthetic Approach to Polyfunctionally Substituted Pyran, Pyridine, and Pyridazine Derivatives.CHEMINFORM, Issue 40 2004Rafat M. Mohareb Abstract For Abstract see ChemInform Abstract in Full Text. [source] 4-Aryl(benzyl)amino-4-heteroarylbut-1-enes as Building Blocks in Heterocyclic Synthesis.CHEMINFORM, Issue 30 2004Part 4. Abstract For Abstract see ChemInform Abstract in Full Text. [source] Molybdenum-Catalyzed Stannylations as Key Steps in Heterocyclic Synthesis.CHEMINFORM, Issue 22 2004Sascha Braune Abstract For Abstract see ChemInform Abstract in Full Text. [source] An Aminoimidazole and Its Utility in Heterocyclic Synthesis.CHEMINFORM, Issue 51 2003Yehya M. Elkholy Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Enaminones as Building Blocks in Heterocyclic Synthesis: A New One-Pot Synthesis of Polyfunctional Substituted Pyridines.CHEMINFORM, Issue 9 2002Samia Michel Agamy Abstract 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. [source] ChemInform Abstract: Thallium(III) Salts in Heterocyclic Synthesis: Synthesis of 3-Aryl-9-methyl-1,2,4-triazolo[4,3-a]quinolines.CHEMINFORM, Issue 26 2001Om V. Singh Abstract 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. [source] Heterocyclic synthesis with ethyl ,-(3-carbamoyl-4,5,6,7-tetrahydrobenzo[b]thiophen-2-ylhydrazono)acetates: An expeditious synthetic approach to polyfunctionally substituted pyran, pyridine, and pyridazine derivativesHETEROATOM CHEMISTRY, Issue 4 2004Rafat M. Mohareb Ethyl ,-(3-carbamoyl-4,5,6,7-tetrahydrobenzo[b]thiophen-2-ylhydrazono)acetates 1 were prepared and established as previously described by our research group. Their reactivity toward a variety of active methylene reagents was studied to give pyran, pyridine, and pyridazine derivatives. © 2004 Wiley Periodicals, Inc. Heteroatom Chem 15:300,306, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20019 [source] Heterocyclic synthesis: A convenient route to some 2-mercepto 1,3,4-oxadiazole and green chemistry microwave-induced one-pot synthesis of 2-aryl 1,3,4-oxadiazole in quinazolone and their antibacterial and antifungal activityJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2005A. R. Desai Several 6-substituted-3-[(5-mercepto-1,3,4-oxadiazol-2-yl)methyl]-2-substituted quinazolin-4(3H)-one or 6-substituted-3-[4-(5-mercepto-1,3,4-oxadiazol-2-yl)phenyl]-2-substituedquinazolin-4(3H)-one 2(a-l) and 6-substituted-3-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]-2-substitutedquinazolin-4(3H)-one or 6-substi-tuted-3-[4-(5-phenyl-1,3,4-oxadiazol-2-yl) phenyl]-2-substitutedquinazolin-4(3H)-one 3(a-l) were synthesized using conventional and microwave techniques respectively and were screened for antibacterial and antifungal activity. [source] Thiophenylhydrazonoacetates in heterocyclic synthesisHETEROATOM CHEMISTRY, Issue 1 2004Rafat M. Mohareb Benzo[b]thiophen-2-yl-hydrazonoesters 4 were synthesized by coupling of 2-diazo-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxamide (1) with either ethyl cyanoacetate or ethyl acetoacetate. The reactivity of 4 toward a variety of nitrogen nucleophiles was investigated to yield pyrazole, isoxazole, pyrimidine, triazine, pyrazolopyridine, and pyrazolopyrimidine derivatives. © 2003 Wiley Periodicals, Inc. 15:15,20, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/.hc10205 [source] ,-Oxoanilides in heterocyclic synthesis: An expeditious synthesis of new polyfunctionally substituted pyridine and pyrazole derivativesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 6 2008A. M. Hussein 3-Oxo- N -{4-[(pyrimidin-2-ylamino)sulfonyl]phenyl}butanamide 3 was condensed with (DMF-DMA) in refluxing dry dioxane to yield branched structure 4 not its linear isomeric 5. Compound 4 readily reacted with active methylene to yield compounds 8a-c, 14, 17 and 20 respectively. Also enaminone 4 reacted with phenyl hydrazine giving 24 and 25. In contrast, when compound 4 reacted with hydrazine hydrate in the same experimental conditions pyrazole derivative 27 was obtained. Furthermore, condensation of anilide 3 with triethylorthoformate in refluxing acetic anhydride afforded the ethoxy methylene derivative 28. On the other hand, compound 28 was reacted with active methylene reagents, and hydrazines to afford the products identical in all respects (mp., mixed mp., and spectral data) with those corresponding to compounds 6-27 respectively. Similarly, compound 3 was reacted with hydrazine hydrate to afford the reaction product 29. Also, compound 3 reacted with cyanoacetamide in refluxing ethanolic pipridine solution to yield the pyridine derivative 30. Finally, 3 reacted with hydroxylamine hydrochloride in refluxing ethanol/sodium acetate solution to yield the acyclic oxime derivative 31. [source] Enaminones in heterocyclic synthesis: A new regioselective synthesis of 2,3,6-trisubstituted pyridines, 6-substituted-3-aroylpyridines and 1,3,5-triaroylbenzenesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2002Balkis Al-Saleh 1-Substituted-3-dimethylaminopropenones 1a-d reacted with acetylacetone and with ethyl acetoacetate to yield regioselectively 2,3,6-trisubstituted pyridines. Refluxing 1a-d in acetic acid/ammonium acetate resulted in the formation of 6-substituted-3-aroylpyridines, whereas refluxing in acetic acid alone afforded 1,3,5-triaroylbenzene. [source] | ||||||||||