مورد إلكتروني
Interplay between the Directing Group and Multifunctional Acetate Ligand in Pd-Catalyzed anti-Acetoxylation of Unsymmetrical Dialkyl-Substituted Alkynes
| العنوان: | Interplay between the Directing Group and Multifunctional Acetate Ligand in Pd-Catalyzed anti-Acetoxylation of Unsymmetrical Dialkyl-Substituted Alkynes |
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| بيانات النشر: | Linköpings universitet, Bioinformatik Linköpings universitet, Tekniska fakulteten Univ Autonoma Madrid UAM, Spain Univ Autonoma Madrid UAM, Spain UAM, Spain; UAM, Spain Univ Autonoma Madrid UAM, Spain; UAM, Spain Univ Autonoma Madrid UAM, Spain; UAM, Spain UAM, Spain; UAM, Spain 2022 |
| تفاصيل مُضافة: | Corpas, Javier Arpa González, Enrique Manuel Lapierre, Romain Corral, Ines Mauleon, Pablo Arrayas, Ramon Gomez Carretero, Juan C. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The cooperative action of the acetate ligand, the 2-pyridyl sulfonyl (SO2Py) directing group on the alkyne substrate,and the palladium catalyst has been shown to be crucial forcontrolling reactivity, regioselectivity, and stereoselectivity in theacetoxylation of unsymmetrical internal alkynes under mildreaction conditions. The corresponding alkenyl acetates wereobtained in good yields with complete levels of beta-regioselectivityandanti-acetoxypalladation stereocontrol. Experimental andcomputational analyses provide insight into the reasons behindthis delicate interplay between the ligand, directing group, and themetal in the reaction mechanism. In fact, these studies unveil themultiple important roles of the acetate ligand in the coordinationsphere at the Pd center: (i) it brings the acetic acid reagent into close proximity to the metal to allow the simultaneous activation ofthe alkyne and the acetic acid, (ii) it serves as an inner-sphere base while enhancing the nucleophilicity of the acid, and (iii) it acts asan intramolecular acid to facilitate protodemetalation and regeneration of the catalyst. Further insight into the origin of the observedregiocontrol is provided by the mapping of potential energy profiles and distortion-interaction analysis Funding Agencies|Ministerio de Ciencia e Innovacion (MICINN); Fondo Europeo de Desarrollo Regional (FEDER, UE) [PGC2018-098660-B-I00, PGC2018-094644-B-C21]; MECD; MINECO |
| مصطلحات الفهرس: | multifunctional ligand; ligand-assisted proton shuttle; acetoxylation of alkynes; unsymmetrical dialkyl alkynes; metal-ligand cooperativity; directing group, Organic Chemistry, Organisk kemi, Article in journal, info:eu-repo/semantics/article, text |
| DOI: | 10.1021.acscatal.2c00710 |
| URL: | ACS Catalysis, 2155-5435, 2022, 12:11, s. 6596-6605 |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess |
| ملاحظة: | application/pdf English |
| أرقام أخرى: | UPE oai:DiVA.org:liu-186510 doi:10.1021/acscatal.2c00710 PMID 35692253 ISI:000810516000030 1349053240 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1349053240 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1021.acscatal.2c00710 |
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