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Bi C, Chadwick J, Davies ML, DelMonte AJ, Geng P, Glace AW, Green RA, Gurak JA, Haley MW, He BL, Inankur B, Jamison CR, Joe CL, Kolotuchin S, Lin D, Lou S, Nye J, Ortiz A, Purdum GE, Rosso VW, Shah M, Simmons EM, Stevens JM, Strotman NA, Tan Y, Zhang L. Coupling-Condensation Strategy for the Convergent Synthesis of an Imidazole-Fused 2-Aminoquinoline NLRP3 Agonist. J Org Chem 2023; 88:384-394. [PMID: 36516991 DOI: 10.1021/acs.joc.2c02395] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The development of a convergent route to the NLRP3 (nucleotide-binding domain and leucine-rich repeat-containing protein 3) agonist BMS-986299 is reported. The synthesis relies on a key Miyaura borylation and a tandem Suzuki-Miyaura coupling between an iodoimidazole and an o-aminochloroarene, followed by acid-mediated cyclization to afford the aminoquinoline core. The subsequent Boc cleavage and regioselective acylation afford the target compound. Two routes to the iodoimidazole intermediate are presented, along with the synthesis of the o-aminochloroarene via Negishi coupling. The convergent six-step route leads to an 80% reduction in process mass intensity compared to the linear enabling synthesis.
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Affiliation(s)
- Cong Bi
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - James Chadwick
- Chemical Process Development, Bristol Myers Squibb, Reeds Lane, Moreton, Wirral CH46 1QW, U.K
| | - Merrill L Davies
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Albert J DelMonte
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Peng Geng
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Andrew W Glace
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Rebecca A Green
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - John A Gurak
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Matthew W Haley
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Brian L He
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Bahar Inankur
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Christopher R Jamison
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Candice L Joe
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Sergei Kolotuchin
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Dong Lin
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Sha Lou
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Jeffrey Nye
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Adrian Ortiz
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Geoffrey E Purdum
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Victor W Rosso
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Mansi Shah
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Eric M Simmons
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Jason M Stevens
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Neil A Strotman
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Yichen Tan
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Ling Zhang
- Chemical Process Development, Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
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Simlandy AK, Rodphon W, Alturaifi TM, Mai BK, Ni HQ, Gurak JA, Liu P, Engle KM. Catalytic Addition of Nitroalkanes to Unactivated Alkenes via Directed Carbopalladation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amit Kumar Simlandy
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Warabhorn Rodphon
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Turki M. Alturaifi
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Hui-Qi Ni
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - John A. Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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3
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Goldfogel MJ, Guo X, Meléndez Matos JL, Gurak JA, Joannou MV, Moffat WB, Simmons EM, Wisniewski SR. Advancing Base-Metal Catalysis: Development of a Screening Method for Nickel-Catalyzed Suzuki–Miyaura Reactions of Pharmaceutically Relevant Heterocycles. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00210] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Matthew J. Goldfogel
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Xuelei Guo
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Jeishla L. Meléndez Matos
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - John A. Gurak
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Matthew V. Joannou
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - William B. Moffat
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Eric M. Simmons
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Steven R. Wisniewski
- Chemical Process Development, Bristol Myers Squibb Company, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
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4
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Wang X, Li ZQ, Mai BK, Gurak JA, Xu JE, Tran VT, Ni HQ, Liu Z, Liu Z, Yang KS, Xiang R, Liu P, Engle KM. Controlling cyclization pathways in palladium(ii)-catalyzed intramolecular alkene hydro-functionalization via substrate directivity. Chem Sci 2020; 11:11307-11314. [PMID: 35382446 PMCID: PMC8914520 DOI: 10.1039/d0sc03409f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/16/2020] [Indexed: 11/21/2022] Open
Abstract
We report a series of palladium(ii)-catalyzed, intramolecular alkene hydrofunctionalization reactions with carbon, nitrogen, and oxygen nucleophiles to form five- and six-membered carbo- and heterocycles. In these reactions, the presence of a proximal bidentate directing group controls the cyclization pathway, dictating the ring size that is generated, even in cases that are disfavored based on Baldwin's rules and in cases where there is an inherent preference for an alternative pathway. DFT studies shed light on the origins of pathway selectivity in these processes. We report a series of palladium(ii)-catalyzed, intramolecular alkene hydrofunctionalization reactions with carbon, nitrogen, and oxygen nucleophiles to form five- and six-membered carbo- and heterocycles.![]()
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Affiliation(s)
- Xin Wang
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA .,Department of Medicinal Chemistry, School of Medicine, Nankai University 94 Weijin Road Tianjin 300071 China
| | - Zi-Qi Li
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburg Pittsburgh Pennsylvania 15260 USA
| | - John A Gurak
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Jessica E Xu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Van T Tran
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Hui-Qi Ni
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Zhen Liu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Zhonglin Liu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Kin S Yang
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
| | - Rong Xiang
- Department of Medicinal Chemistry, School of Medicine, Nankai University 94 Weijin Road Tianjin 300071 China
| | - Peng Liu
- Department of Chemistry, University of Pittsburg Pittsburgh Pennsylvania 15260 USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA
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5
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Vasquez AM, Gurak JA, Joe CL, Cherney EC, Engle KM. Catalytic α-Hydroarylation of Acrylates and Acrylamides via an Interrupted Hydrodehalogenation Reaction. J Am Chem Soc 2020; 142:10477-10484. [PMID: 32379433 PMCID: PMC7293711 DOI: 10.1021/jacs.0c03040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The palladium-catalyzed, α-selective hydroarylation of acrylates and acrylamides is reported. Under optimized conditions, this method is highly tolerant of a wide range of substrates including those with base sensitive functional groups and/or multiple enolizable carbonyl groups. A detailed mechanistic study was undertaken, and the high selectivity of this transformation was shown to be enabled by the formation of a [PdII(Ar)(H)] intermediate, which performs selective hydride insertion into the β-position of α,β-unsaturated carbonyl compounds.
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Affiliation(s)
- Alena M. Vasquez
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - John A. Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Candice L. Joe
- Chemistry Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Emily C. Cherney
- Discovery Chemistry, Bristol Myers Squibb, US Rt. 206 & Province Line Road, Princeton, New Jersey 08540, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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6
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Abstract
The Mizoroki-Heck reaction is one of the most studied palladium-catalyzed cross-coupling reactions, representing a powerful method for forming C-C bonds between diverse substrates with broad functional group compatibility. However, the reductive variant has received considerably less attention. In this Review, we summarize distinct mechanistic aspects of the reductive Heck reaction, highlight recent contributions to the field, and discuss potential applications of the reductive Heck reaction in the pharmaceutical industry. With the potential to have a large impact in both academic and industrial settings, further development of the reductive Heck reaction is a promising area of future investigation.
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Affiliation(s)
- Lucas J. Oxtoby
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - John A. Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Steven R. Wisniewski
- Chemical & Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Martin D. Eastgate
- Chemical & Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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7
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Abstract
The hydroarylation of alkenes is an attractive approach to construct carbon-carbon (C-C) bonds from abundant and structurally diverse starting materials. Herein we report a palladiumcatalyzed reductive Heck hydroarylation of unactivated and heteroatom-substituted terminal alkenes with an array of (hetero)aryl iodides. The reaction is anti-Markovnikov selective and tolerates a wide variety of functional groups on both the alkene and (hetero)aryl coupling partners. Additionally, applications of this method to complex molecule diversifications were demonstrated. Deuteriumlabeling experiments are consistent with a mechanism in which the key alkylpalladium(II) intermediate is intercepted with formate and undergoes a decarboxylation/C-H reductive elimination cascade to afford the saturated product and turn over the cycle.
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Affiliation(s)
- John A Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
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8
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Tran VT, Gurak JA, Yang KS, Engle KM. Activation of diverse carbon-heteroatom and carbon-carbon bonds via palladium(II)-catalysed β-X elimination. Nat Chem 2018; 10:1126-1133. [PMID: 30127512 DOI: 10.1038/s41557-018-0110-z] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/19/2018] [Indexed: 11/09/2022]
Abstract
Chemists' ability to synthesize structurally complex, high-value organic molecules from simple starting materials is limited by methods to selectively activate and functionalize strong alkyl C(sp3) covalent bonds. Recent activity has focused on the activation of abundant C-O, C-N and C-C bonds via a mechanistic paradigm of oxidative addition of a low-valent, electron-rich transition metal. This approach typically employs nickel(0), rhodium(I), ruthenium(0) and iron catalysts under conditions finely tuned for specific, electronically activated substrates, sometimes assisted by chelating functional groups or ring strain. By adopting a redox-neutral strategy involving palladium(II)-catalysed C-H activation followed by β-heteroatom/carbon elimination, we describe here a catalytic method to activate alkyl C(sp3)-oxygen, nitrogen, carbon, fluorine and sulfur bonds with high regioselectivity. Directed hydrofunctionalization of the resultant palladium(II)-bound alkene leads to formal functional group metathesis. The method is applied to amino acid upgrading with complete regioselectivity and moderate to high retention of enantiomeric excess. Low-strain heterocycles undergo strong-bond activation and substitution, giving ring-opened products.
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Affiliation(s)
- Van T Tran
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - John A Gurak
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - Kin S Yang
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA.
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9
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O'Duill ML, Matsuura R, Wang Y, Turnbull JL, Gurak JA, Gao DW, Lu G, Liu P, Engle KM. Tridentate Directing Groups Stabilize 6-Membered Palladacycles in Catalytic Alkene Hydrofunctionalization. J Am Chem Soc 2017; 139:15576-15579. [PMID: 28972751 DOI: 10.1021/jacs.7b08383] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Removable tridentate directing groups inspired by pincer ligands have been designed to stabilize otherwise kinetically and thermodynamically disfavored 6-membered alkyl palladacycle intermediates. This family of directing groups enables regioselective remote hydrocarbofunctionalization of several synthetically useful alkene-containing substrate classes, including 4-pentenoic acids, allylic alcohols, homoallyl amines, and bis-homoallylamines, under Pd(II) catalysis. In conjunction with previous findings, we demonstrate regiodivergent hydrofunctionalization of 3-butenoic acid derivatives to afford either Markovnikov or anti-Markovnikov addition products depending on directing group choice. Preliminary mechanistic and computational data are presented to support the proposed catalytic cycle.
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Affiliation(s)
- Miriam L O'Duill
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Rei Matsuura
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Yanyan Wang
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Joshua L Turnbull
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - John A Gurak
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - De-Wei Gao
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Gang Lu
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh , 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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Gurak JA, Tran VT, Sroda MM, Engle KM. N-alkylation of 2-pyridone derivatives via palladium(II)-catalyzed directed alkene hydroamination. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Yang KS, Gurak JA, Liu Z, Engle KM. Catalytic, Regioselective Hydrocarbofunctionalization of Unactivated Alkenes with Diverse C–H Nucleophiles. J Am Chem Soc 2016; 138:14705-14712. [DOI: 10.1021/jacs.6b08850] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Kin S. Yang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - John A. Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Zhen Liu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
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12
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Affiliation(s)
- John A. Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kin S. Yang
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Zhen Liu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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13
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Yang SH, Wang EH, Gurak JA, Bhawal S, Deshmukh R, Wijeratne AB, Edwards BL, Foss FW, Timmons RB, Schug KA. Affinity mesh screen materials for selective extraction and analysis of antibiotics using transmission mode desorption electrospray ionization mass spectrometry. Langmuir 2013; 29:8046-8053. [PMID: 23721220 DOI: 10.1021/la401125e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The extraction of active compounds from natural sources has shown to be an effective approach to drug discovery. However, the isolation and identification of natural products from complex extracts can be an arduous task. A novel approach to drug discovery is presented through the use of polymer screens functionalized with an l-lysine-d-alanine-d-alanine (Kaa) peptide to create new affinity capture mesh screen materials. The Kaa sequence is a well-characterized specific binding site for antibiotics that inhibit cell wall synthesis in Gram-positive bacteria. The detailed synthesis and characterization of these novel screen materials are presented in this work. Polypropylene mesh screens were first coated with a poly(acrylic acid) film by pulsed plasma polymerization. The synthesized Kaa peptide was then covalently attached to carboxylic acid groups through a condensation reaction. An analysis of captured compounds was performed in a rapid fashion with transmission-mode desorption electrospray ionization (TM-DESI) mass spectrometry. A proof of principle was demonstrated to show the ability of the novel affinity capture materials to select for a macrocyclic antibiotic, vancomycin, over a negative control compound, spectinomycin. With further development, this method may provide a rapid screening technique for new antibacterial compounds, for example, those extracted from natural product sources having a limited supply. Here, we show that the screen can capture vancomycin preferentially over spectinomycin in a spiked extract of tea leaves.
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Affiliation(s)
- Samuel H Yang
- Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA
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Gurak JA, Chinn JW, Lagow RJ. Characterization of the vapor species of dilithiomethane by flash vaporization mass spectroscopy and the Ziegler synthesis of dilithiomethane. J Am Chem Soc 2002. [DOI: 10.1021/ja00373a052] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Shimp LA, Morrison JA, Gurak JA, Chinn JW, Lagow RJ. Observations on the nature of polylithium organic compounds and their rearrangements. J Am Chem Soc 2002. [DOI: 10.1021/ja00409a074] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gurak JA, Chinn JW, Lagow RJ, Steinfink H, Yannoni CS. Synthesis of isotopic forms of dilithiomethane [(CH26Li2)n and (CD2Li2)n] and preliminary structural information obtained by x-ray powder and solid-phase carbon-13 NMR techniques. Inorg Chem 2002. [DOI: 10.1021/ic00191a010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Gurak JA, Chinn JW, Lagow RJ, Kendrick RD, Yannoni CS. Solid phase 13C NMR techniques, a new structural probe for the study of solid organolithium compounds. Inorganica Chim Acta 1985. [DOI: 10.1016/s0020-1693(00)87567-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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