Heterocyclic Intermediates Research Articles

Novel Heterocyclic Intermediates for Cross-coupling Reactions

RETURN TO ISSUEPREVAdvertisementNEXTNovel Heterocyclic Intermediates for Cross-coupling ReactionsCite this: Chem. Eng. News 2013, 91, 27, ifcPublication Date (Print):July 8, 2013Publication History Published online31 March 2014Published inissue 8 July 2013https://doi.org/10.1021/cen-09127-ad01Copyright © 2013 Chemical & Engineering NewsArticle Views58Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (315 KB) SUBJECTS:Cross coupling reaction Get e-Alerts

ChemInform Abstract: P‐Directed Borylation of Phenols.

AbstractInternal borylation occurs upon activation of aryl di‐isopropylphosphinite boranes with HNTf2 giving heterocyclic intermediates leading either to (II) or phenolic potassium salts (VI).

Synthesis and cycloaddition chemistry of oxetanyl-substituted sydnones

Oxetan-3-one reacts with 4-metallated sydnones to provide functionalised precursors to a variety of novel pyrazoles. Intermolecular cycloadditions were found to proceed in variable yield, but intramolecular cycloadditions were very efficient and provide an effective means to generate spiro-substituted heterocyclic intermediates. The potential of these compounds for further elaboration has been highlighted by cross-coupling reactions.

P-Directed Borylation of Phenols

Internal borylation occurs upon activation of aryl di-isopropylphosphinite boranes with HNTf(2) to give heterocyclic intermediates that can be reductively quenched to afford 6 or treated with KHF(2) to give the phenolic potassium aryl trifluoroborate salts 10. The latter salts are useful for Pd-catalyzed coupling with aryl iodides under Molander conditions, provided that precautions are taken to remove the KNTf(2) byproduct from the preceding KHF(2) step.

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates Derived From Catalysis

Novel Heterocyclic Intermediates Derived From Catalysis

Novel Heterocyclic Intermediates Derived From Catalysis

Novel Heterocyclic Intermediates Derived From Catalysis

Novel Heterocyclic Intermediates for Cross-coupling Reactions

RETURN TO ISSUEPREVAdvertisementNEXTNovel Heterocyclic Intermediates for Cross-coupling ReactionsCite this: Chem. Eng. News 2012, 90, 27, 1Publication Date (Print):July 2, 2012Publication History Published online29 March 2013Published inissue 2 July 2012https://doi.org/10.1021/cen-09027-ad02Copyright © 2012 Chemical & Engineering NewsArticle Views63Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (46 KB) SUBJECTS:Cross coupling reaction Get e-Alerts

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Solvent Free N-Heterocyclization of Primary Amines to N-Substituted Azacyclopentanes Using Hydrotalcite as Solid Base Catalyst

An ecofriendly catalytic route for selective synthesis of N-substituted azacyclopentanes, nitrogen-containing heterocyclic intermediates for many bioactive compounds, was established by carrying out N-heterocyclization (di N-alkylation) of primary amines with 1,4-dichloro butane (as dialkylating agent) using catalytic amount of hydrotalcite as solid base catalyst. The hydrotalcite was found to be efficient solid base catalyst for di Nalkylation of different primary amines (aniline, benzyl amine, cyclohexyl amine and n-butyl amine) giving 82 to 96% conversion (at optimized reaction condition) of 1,4-dichloro butane and > 99% selectivity of respective N-substituted azacyclopentanes within 30 min. under solvent free condition. The reaction parameters significantly influence the conversion of 1,4-dichloro butane to N-substituted azacyclopentanes. The nature of substituent present on amino group affects the reactivity of amine substrates for di N-alkylation reaction with 1,4-dichloro butane. The 1,4-dichloro butane was found to be highly reactive alkylating agent for di Nalkylation of amines as compared to 1,4-dihydroxy butane. The reusability of the catalyst and its chemical stability in the reaction was demonstrated.

Heterocyclic Intermediates for Cross-coupling Reactions

RETURN TO ISSUEPREVAdvertisementNEXTHeterocyclic Intermediates for Cross-coupling ReactionsCite this: Chem. Eng. News 2011, 89, 44, 1Publication Date (Print):October 31, 2011Publication History Published online9 March 2012Published inissue 31 October 2011https://doi.org/10.1021/cen-v089n044.p001Copyright © 2011 AMERICAN CHEMICAL SOCIETYArticle Views65Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (110 KB) SUBJECTS:Cross coupling reaction Get e-Alerts

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Catalog of Heterocyclic Intermediates Custom Synthesis · FTEs

Catalog of Heterocyclic Intermediates Custom Synthesis · FTEs

Novel Heterocyclic Intermediates Derived from Catalysis for Cross-coupling Reactions

RETURN TO ISSUEPREVAdvertisementNEXTNovel Heterocyclic Intermediates Derived from Catalysis for Cross-coupling ReactionsCite this: Chem. Eng. News 2011, 89, 22, ibcPublication Date (Print):May 30, 2011Publication History Published online9 March 2012Published inissue 30 May 2011https://doi.org/10.1021/cen-v089n022.ibcCopyright © 2011 AMERICAN CHEMICAL SOCIETYArticle Views12Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (88 KB) SUBJECTS:Cross coupling reaction,Catalysis Get e-Alerts

Novel Heterocyclic Intermediates for Cross-coupling Reactions

Novel Heterocyclic Intermediates for Cross-coupling Reactions

ChemInform Abstract: Synthesis of Heterocycles via Alkoxyallenes

AbstractReview: 30 refs.

ChemInform Abstract: Heterocyclic Intermediates for the Synthesis of Disperse and Cationic Dyes.

Nitro derivatives and amines containing X-azolo[4,5-c]pyridine moieties were prepared choosing more favourable synthetic pathways. Their physical and spectroscopic data were discussed in correlation with those of previously studied systems. The heteroaromatic amines were shown to be suitable precursors for the synthesis of disperse dyes and of their cationic counterparts.

ChemInform Abstract: Asymmetric Syntheses via Heterocyclic Intermediates. Part 45. Asymmetric Synthesis of Diastereomerically and Enantiomerically Pure 3- Substituted (2R,3S)-Serine Methyl Esters.

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 Abstract: Asymmetric Syntheses via Heterocyclic Intermediates. Part 49. Asymmetric Synthesis of Diastereomerically and Enantiomerically Pure . alpha.-Amino-γ-nitro Carboxylic Esters via Michael Addition of the Titanated Bislactim Ether of Cyclo

ChemInform Abstract: Asymmetric Syntheses via Heterocyclic Intermediates. Part 49. Asymmetric Synthesis of Diastereomerically and Enantiomerically Pure . alpha.-Amino-γ-nitro Carboxylic Esters via Michael Addition of the Titanated Bislactim Ether of Cyclo