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Title: Synthesis of Tridentate [1,2,4] Triazinyl-Pyridin-2-yl Indole Lewis Basic Complexants via Pd-Catalyzed Suzuki–Miyaura Cross-Coupling

Abstract

Full closure of the nuclear fuel cycle is predicated, in part, on defining efficient separations processes for the effective speciation of the neutron-absorbing lanthanides from the minor actinides post-PUREX. Pursuant to the aforementioned, a class of tridentate, Lewis basic procomplexants have been prepared leveraging a Pd-catalyzed Suzuki–Miyaura cross-coupling between 6-bromo-[1,2,4]-triazinylpyridine derivatives and various protected indole-boronic acids to afford functionalized 2-[6-(5,6-diphenyl-[1,2,4]triazin-3-yl)-pyridin-2-yl]-1H-indoles. A highly active catalyst/ligand system with low loadings was employed rapidly affording 26 examples in yields as high as 85%. Method optimization, substrate and indole scope, comparative analysis between coupling reagents, and a scale-up experiment are reported.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]
  1. Tennessee Technological Univ., Cookeville, TN (United States)
Publication Date:
Research Org.:
Tennessee Technological Univ., Cookeville, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1572218
Alternate Identifier(s):
OSTI ID: 1574459
Grant/Contract Number:  
SC0018033
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Volume: 4; Journal Issue: 20; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Gulledge, Zachary Z., Tedder, Mariah L., Lyons, Kyle R., and Carrick, Jesse D. Synthesis of Tridentate [1,2,4] Triazinyl-Pyridin-2-yl Indole Lewis Basic Complexants via Pd-Catalyzed Suzuki–Miyaura Cross-Coupling. United States: N. p., 2019. Web. doi:10.1021/acsomega.9b02891.
Gulledge, Zachary Z., Tedder, Mariah L., Lyons, Kyle R., & Carrick, Jesse D. Synthesis of Tridentate [1,2,4] Triazinyl-Pyridin-2-yl Indole Lewis Basic Complexants via Pd-Catalyzed Suzuki–Miyaura Cross-Coupling. United States. doi:10.1021/acsomega.9b02891.
Gulledge, Zachary Z., Tedder, Mariah L., Lyons, Kyle R., and Carrick, Jesse D. Tue . "Synthesis of Tridentate [1,2,4] Triazinyl-Pyridin-2-yl Indole Lewis Basic Complexants via Pd-Catalyzed Suzuki–Miyaura Cross-Coupling". United States. doi:10.1021/acsomega.9b02891.
@article{osti_1572218,
title = {Synthesis of Tridentate [1,2,4] Triazinyl-Pyridin-2-yl Indole Lewis Basic Complexants via Pd-Catalyzed Suzuki–Miyaura Cross-Coupling},
author = {Gulledge, Zachary Z. and Tedder, Mariah L. and Lyons, Kyle R. and Carrick, Jesse D.},
abstractNote = {Full closure of the nuclear fuel cycle is predicated, in part, on defining efficient separations processes for the effective speciation of the neutron-absorbing lanthanides from the minor actinides post-PUREX. Pursuant to the aforementioned, a class of tridentate, Lewis basic procomplexants have been prepared leveraging a Pd-catalyzed Suzuki–Miyaura cross-coupling between 6-bromo-[1,2,4]-triazinylpyridine derivatives and various protected indole-boronic acids to afford functionalized 2-[6-(5,6-diphenyl-[1,2,4]triazin-3-yl)-pyridin-2-yl]-1H-indoles. A highly active catalyst/ligand system with low loadings was employed rapidly affording 26 examples in yields as high as 85%. Method optimization, substrate and indole scope, comparative analysis between coupling reagents, and a scale-up experiment are reported.},
doi = {10.1021/acsomega.9b02891},
journal = {ACS Omega},
number = 20,
volume = 4,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acsomega.9b02891

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