Hunter O. Ford, Brian L. Chaloux, Nishani K. Jayakody, Christopher A. Klug, Eric G. Ruzicka, Meghanne Tighe, Ryan H. DeBlock, Jeffrey W. Long, Debra R. Rolison and Megan Bourg Sassin*,
{"title":"","authors":"Hunter O. Ford, Brian L. Chaloux, Nishani K. Jayakody, Christopher A. Klug, Eric G. Ruzicka, Meghanne Tighe, Ryan H. DeBlock, Jeffrey W. Long, Debra R. Rolison and Megan Bourg Sassin*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 1","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":3.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsorginorgau.4c00053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144403755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Johannes Schöntag, Theresa Hettiger, William Roberts, Marcus Scheele, Markus Ströbele, Holger F Bettinger
{"title":"Rearrangement Cascade Initiated by Nucleophilic Benzyne Attack on 3,6-Di(2-pyridyl)-1,2-diazines.","authors":"Johannes Schöntag, Theresa Hettiger, William Roberts, Marcus Scheele, Markus Ströbele, Holger F Bettinger","doi":"10.1021/acsorginorgau.4c00070","DOIUrl":"10.1021/acsorginorgau.4c00070","url":null,"abstract":"<p><p>Aryne intermediates in synthetic organic chemistry offer versatile routes to complex heterocyclic structures that are valuable in pharmaceuticals and materials science. We present a one-step aryne-mediated reaction to synthesize pyrido[1,2-<i>a</i>]indoles interconnected through vinylene or 1,2-phenylene linkers to pyridotriazoles using 2-pyridyl-substituted pyridazines and phthalazines as confirmed via single-crystal X-ray crystallography and NMR spectroscopy. This unexpected rearrangement proceeds under mild conditions. Considering that five bonds are broken and three new bonds are formed in the reaction between 3,6-di-2-pyridyl-1,2,4,5-tetrazine and benzyne, the yield of 16% is fair. Electron-rich substituents on aryne precursors destabilized the products, while electron-deficient substituents offered some stability improvements. DFT studies could reveal the mechanism of this rearrangement.</p>","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 2","pages":"97-104"},"PeriodicalIF":3.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11969272/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143796378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Organic & Inorganic AuPub Date : 2025-01-27DOI: 10.1021/acsorginorgau.4c0007010.1021/acsorginorgau.4c00070
Johannes Schöntag, Theresa Hettiger, William Roberts, Marcus Scheele, Markus Ströbele and Holger F. Bettinger*,
{"title":"Rearrangement Cascade Initiated by Nucleophilic Benzyne Attack on 3,6-Di(2-pyridyl)-1,2-diazines","authors":"Johannes Schöntag, Theresa Hettiger, William Roberts, Marcus Scheele, Markus Ströbele and Holger F. Bettinger*, ","doi":"10.1021/acsorginorgau.4c0007010.1021/acsorginorgau.4c00070","DOIUrl":"https://doi.org/10.1021/acsorginorgau.4c00070https://doi.org/10.1021/acsorginorgau.4c00070","url":null,"abstract":"<p >Aryne intermediates in synthetic organic chemistry offer versatile routes to complex heterocyclic structures that are valuable in pharmaceuticals and materials science. We present a one-step aryne-mediated reaction to synthesize pyrido[1,2-<i>a</i>]indoles interconnected through vinylene or 1,2-phenylene linkers to pyridotriazoles using 2-pyridyl-substituted pyridazines and phthalazines as confirmed via single-crystal X-ray crystallography and NMR spectroscopy. This unexpected rearrangement proceeds under mild conditions. Considering that five bonds are broken and three new bonds are formed in the reaction between 3,6-di-2-pyridyl-1,2,4,5-tetrazine and benzyne, the yield of 16% is fair. Electron-rich substituents on aryne precursors destabilized the products, while electron-deficient substituents offered some stability improvements. DFT studies could reveal the mechanism of this rearrangement.</p>","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 2","pages":"97–104 97–104"},"PeriodicalIF":3.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsorginorgau.4c00070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Germán Rodríguez-López, Tayde O Villaseñor-Granados, Sonia Sánchez-Ruiz, Adriana Esparza-Ruiz, Angelina Flores-Parra
{"title":"<i>N</i>-Heterocyclic Carbene-Borane Adducts with Chiral (<i>R</i>)-Chloroethyl and Vinyl Substituents.","authors":"Germán Rodríguez-López, Tayde O Villaseñor-Granados, Sonia Sánchez-Ruiz, Adriana Esparza-Ruiz, Angelina Flores-Parra","doi":"10.1021/acsorginorgau.4c00088","DOIUrl":"10.1021/acsorginorgau.4c00088","url":null,"abstract":"<p><p>This research provides how chiral imidazolium salts {1,3-bis[1'-chloro-1'-phenylpropan-2'-yl]-imidazolium} (<b>1a</b>) and enantiopure {1,3-bis[(<i>R</i>)-1-chlorobutan-2-yl]-imidazolium} [<b>1b</b>] can be utilized in diverse synthetic pathways to obtain new carbene-borane adducts (<b>2a</b>-<b>2d</b>): {1,3-bis[1'-chloro-1'-phenylpropan-2'-yl]-imidazolyl-2-ylidene-borane} (<b>2a</b>), {1,3-bis[(<i>Z</i>)-1'-phenylpropen-2'-yl]-imidazolyl-2-ylidene-borane} (<b>2b</b>), {1,3-bis[(<i>R</i>)-1-chlorobutan-2-yl]-imidazolyl-2-ylidene-borane} (<b>2c</b>), and {1,3-bis[but-1-en-2-yl]-imidazolyl-2-ylidene-borane} (<b>2d</b>). The carbene-borane adducts were synthesized and characterized by <sup>13</sup>C, <sup>1</sup>H, and <sup>11</sup>B nuclear magnetic resonance spectroscopy and time-of-flight mass spectrometry. The X-ray crystal analyses of compounds <b>2a</b> and <b>2b</b> were performed, and to understand the structure and interactions of <b>2a</b>, a computational study was carried out. The effect of <i>N</i>-substituents in the NHC-borane adducts was clearly observed in the C-B bond lengths obtained by single-crystal X-ray diffraction, where the C-B bond is longer for adducts with <i>N</i>-(<i>R</i>)-chloroethyl substituents than for vinyl substituents. The analysis of the reduced density gradient and the bond critical point calculations of <b>2a</b> showed intramolecular proton-hydride and Cl···N interactions. These chiral imidazolium salts could have applicability in the development of new materials and possibly in pharmaceutical research.</p>","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 2","pages":"136-143"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11969273/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143796302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Organic & Inorganic AuPub Date : 2025-01-16DOI: 10.1021/acsorginorgau.4c0008810.1021/acsorginorgau.4c00088
Germán Rodríguez-López, Tayde O. Villaseñor-Granados, Sonia Sánchez-Ruiz, Adriana Esparza-Ruiz* and Angelina Flores-Parra*,
{"title":"N-Heterocyclic Carbene-Borane Adducts with Chiral (R)-Chloroethyl and Vinyl Substituents","authors":"Germán Rodríguez-López, Tayde O. Villaseñor-Granados, Sonia Sánchez-Ruiz, Adriana Esparza-Ruiz* and Angelina Flores-Parra*, ","doi":"10.1021/acsorginorgau.4c0008810.1021/acsorginorgau.4c00088","DOIUrl":"https://doi.org/10.1021/acsorginorgau.4c00088https://doi.org/10.1021/acsorginorgau.4c00088","url":null,"abstract":"<p >This research provides how chiral imidazolium salts {1,3-bis[1′-chloro-1′-phenylpropan-2′-yl]-imidazolium} (<b>1a</b>) and enantiopure {1,3-bis[(<i>R</i>)-1-chlorobutan-2-yl]-imidazolium} [<b>1b</b>] can be utilized in diverse synthetic pathways to obtain new carbene-borane adducts (<b>2a</b>–<b>2d</b>): {1,3-bis[1′-chloro-1′-phenylpropan-2′-yl]-imidazolyl-2-ylidene-borane} (<b>2a</b>), {1,3-bis[(<i>Z</i>)-1′-phenylpropen-2′-yl]-imidazolyl-2-ylidene-borane} (<b>2b</b>), {1,3-bis[(<i>R</i>)-1-chlorobutan-2-yl]-imidazolyl-2-ylidene-borane} (<b>2c</b>), and {1,3-bis[but-1-en-2-yl]-imidazolyl-2-ylidene-borane} (<b>2d</b>). The carbene-borane adducts were synthesized and characterized by <sup>13</sup>C, <sup>1</sup>H, and <sup>11</sup>B nuclear magnetic resonance spectroscopy and time-of-flight mass spectrometry. The X-ray crystal analyses of compounds <b>2a</b> and <b>2b</b> were performed, and to understand the structure and interactions of <b>2a</b>, a computational study was carried out. The effect of <i>N</i>-substituents in the NHC-borane adducts was clearly observed in the C–B bond lengths obtained by single-crystal X-ray diffraction, where the C–B bond is longer for adducts with <i>N</i>-(<i>R</i>)-chloroethyl substituents than for vinyl substituents. The analysis of the reduced density gradient and the bond critical point calculations of <b>2a</b> showed intramolecular proton–hydride and Cl···N interactions. These chiral imidazolium salts could have applicability in the development of new materials and possibly in pharmaceutical research.</p>","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 2","pages":"136–143 136–143"},"PeriodicalIF":3.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsorginorgau.4c00088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Strategic Methodologies for Efficient Synthesis of Imidazo[1,5-a]pyridine and Benzazepine Analogs via the Unique Ritter-Type Reaction","authors":"Gunniga Tanomsiri, Suthimon Boonmee, Nattawadee Chaisan, Jumreang Tummatorn*, Charnsak Thongsornkleeb and Somsak Ruchirawat, ","doi":"10.1021/acsorginorgau.4c0007510.1021/acsorginorgau.4c00075","DOIUrl":"https://doi.org/10.1021/acsorginorgau.4c00075https://doi.org/10.1021/acsorginorgau.4c00075","url":null,"abstract":"<p >We have developed novel approaches for synthesizing imidazo[1,5-<i>a</i>]pyridine and benzazepine analogs through a Ritter-type reaction. These methods utilize bismuth(III) trifluoromethanesulfonate (Bi(OTf)<sub>3</sub>), an efficient catalyst for converting benzylic alcohol into benzylic cations, in combination with <i>para</i>-toluenesulfonic acid (<i>p</i>-TsOH·H<sub>2</sub>O). The procedures offer a wide substrate scope and deliver the desired products in yields ranging from moderate to excellent.</p>","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 2","pages":"117–135 117–135"},"PeriodicalIF":3.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsorginorgau.4c00075","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Strategic Methodologies for Efficient Synthesis of Imidazo[1,5-<i>a</i>]pyridine and Benzazepine Analogs via the Unique Ritter-Type Reaction.","authors":"Gunniga Tanomsiri, Suthimon Boonmee, Nattawadee Chaisan, Jumreang Tummatorn, Charnsak Thongsornkleeb, Somsak Ruchirawat","doi":"10.1021/acsorginorgau.4c00075","DOIUrl":"10.1021/acsorginorgau.4c00075","url":null,"abstract":"<p><p>We have developed novel approaches for synthesizing imidazo[1,5-<i>a</i>]pyridine and benzazepine analogs through a Ritter-type reaction. These methods utilize bismuth(III) trifluoromethanesulfonate (Bi(OTf)<sub>3</sub>), an efficient catalyst for converting benzylic alcohol into benzylic cations, in combination with <i>para</i>-toluenesulfonic acid (<i>p</i>-TsOH·H<sub>2</sub>O). The procedures offer a wide substrate scope and deliver the desired products in yields ranging from moderate to excellent.</p>","PeriodicalId":29797,"journal":{"name":"ACS Organic & Inorganic Au","volume":"5 2","pages":"117-135"},"PeriodicalIF":3.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11969277/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143796448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}