1
|
Polimera SR, Ilangovan A, Subbaiah MAM. Examining the Scope of Deriving β-Aryl Enones from Enol Silanes as Ketone Equivalents via Pd(II)-Mediated Sequential Dehydrosilylation and Arylation. J Org Chem 2023. [PMID: 37192466 DOI: 10.1021/acs.joc.3c00502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Silyl enol ethers were examined as a masked source of saturated ketones to derive β-aryl enones and their derivatives by dehydrosilylation to generate enones in situ and subsequent oxidative arylation with arylboronic acids as transmetallation coupling partners using relayed Pd(II) catalysis in one pot under base-free conditions. Oxygen was found to be an efficient and green oxidant to enable both dehydrosilylation of enol silanes and arylation. Additionally, arylation conditions can be custom-designed to take advantage of aryl halides as an alternative source of arylating agents. The preparative scope was investigated with 35 examples (up to 95% yield), and mechanistic studies implied a cationic Pd(II)-based catalytic system.
Collapse
Affiliation(s)
- Subba Rao Polimera
- Department of Medicinal Chemistry, Biocon Bristol Myers Squibb R&D Centre, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore 560099, Karnataka, India
- Department of Chemistry, Bharathidasan University, Palkalaiperur, Thiruchirapalli 620024, Tamil Nadu, India
| | - Andivelu Ilangovan
- Department of Chemistry, Bharathidasan University, Palkalaiperur, Thiruchirapalli 620024, Tamil Nadu, India
| | - Murugaiah A M Subbaiah
- Department of Medicinal Chemistry, Biocon Bristol Myers Squibb R&D Centre, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore 560099, Karnataka, India
| |
Collapse
|
2
|
Wen ZK, Zhao ZK, Wang NJ, Chen ZL, Chao JB, Feng LH. Palladium-Catalyzed Controllable Reductive/Oxidative Heck Coupling between Cyclic Enones and Thiophenes via C–H Activation. Org Lett 2019; 21:9545-9549. [DOI: 10.1021/acs.orglett.9b03721] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhen-Kang Wen
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Ze-Kai Zhao
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Ning-Jing Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Zi-Ling Chen
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Jian-Bin Chao
- Scientific Instrument Center, Shanxi University, Taiyuan 030006, China
| | - Li-Heng Feng
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| |
Collapse
|
3
|
Wen ZK, Song TT, Liu YF, Chao JB. Palladium-catalyzed dehydrogenative coupling of cyclic enones with thiophenes: a rapid access to β-heteroarylated cyclic enones. Chem Commun (Camb) 2018; 54:3668-3671. [DOI: 10.1039/c8cc01059e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A dehydrogenative coupling reaction of cyclic enones with thiophenes through palladium-catalyzed C–H functionalization is reported herein. Further molecular transformations of the coupling products to synthetically useful meta-heteroarylated phenols are also demonstrated.
Collapse
Affiliation(s)
- Zhen-Kang Wen
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Ting-Ting Song
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Yu-Fang Liu
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Jian-Bin Chao
- Scientific Instrument Center
- Shanxi University
- Taiyuan 030006
- China
| |
Collapse
|
4
|
Yang SM, Kuo GH, Gaul MD, Murray WV. Synthesis of β-Substituted Cyclic Enones via Phosphonium Salt-Activated, Palladium-Catalyzed Cross-Coupling of Cyclic 1,3-Diones. J Org Chem 2016; 81:3464-9. [PMID: 27052958 DOI: 10.1021/acs.joc.6b00317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Phosphonium salt-activated, Pd-catalyzed Suzuki-Miyaura and Sonogashira cross-coupling reactions of cyclic 1,3-diones in the synthesis of β-substituted cyclic enones are described. These transformations exhibit good isolated yield and high generality with respect to both substrates and coupling partners. Extension of the substrate scope to cyclic 1,3-dione equivalents, such as 2-cyanocyclohexanone (4), is also briefly examined.
Collapse
Affiliation(s)
- Shyh-Ming Yang
- Cardiovascular and Metabolism Research, Janssen Research and Development, LLC , Welsh & McKean Roads, Spring House, Pennsylvania 19477, United States
| | - Gee-Hong Kuo
- Cardiovascular and Metabolism Research, Janssen Research and Development, LLC , Welsh & McKean Roads, Spring House, Pennsylvania 19477, United States
| | - Michael D Gaul
- Cardiovascular and Metabolism Research, Janssen Research and Development, LLC , Welsh & McKean Roads, Spring House, Pennsylvania 19477, United States
| | - William V Murray
- Cardiovascular and Metabolism Research, Janssen Research and Development, LLC , Welsh & McKean Roads, Spring House, Pennsylvania 19477, United States
| |
Collapse
|
5
|
|
6
|
|
7
|
Khalaf J, Estrella-Jimenez ME, Shashack MJ, Phatak SS, Zhang S, Gilbertson SR. Design, synthesis, and diversification of 3,5-substituted enone library. ACS COMBINATORIAL SCIENCE 2011; 13:351-6. [PMID: 21648460 DOI: 10.1021/co200070m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This paper describes the synthesis of a 300 member library of 3,5-substituted enones. The synthesis starts with 6 different bromoenones that are accessed from the corresponding 1,3 diones. These bromides are then diversified by Suzuki coupling with a variety of aromatic and vinyl boronic acids. Additionally a small series of triazoles was synthesized by a Sonogashira coupling reaction dipolar cycloaddition sequence. The library was analyzed by principal component analysis to examine its diversity.
Collapse
Affiliation(s)
- Juhienah Khalaf
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | | | - Matthew J. Shashack
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Sharangdhar S. Phatak
- Integrated Molecular Discovery Laboratory, Department of Experimental Therapeutics, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston Texas 77030, United States
- School of Biomedical Informatics, The University of Texas Health Science Center, 7000 Fannin Street, Houston, Texas 77030, United States
| | - Shuxing Zhang
- Integrated Molecular Discovery Laboratory, Department of Experimental Therapeutics, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston Texas 77030, United States
| | - Scott R. Gilbertson
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| |
Collapse
|
8
|
|
9
|
Hämmerle J, Schnürch M, Iqbal N, Mihovilovic MD, Stanetty P. A guideline for the arylation of positions 4 and 5 of thiazole via Pd-catalyzed cross-coupling reactions. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.07.081] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Testing the efficacy and toxicity of adenylyl cyclase inhibitors against enteric pathogens using in vitro and in vivo models of infection. Infect Immun 2010; 78:1740-9. [PMID: 20123712 DOI: 10.1128/iai.01114-09] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Enterotoxigenic Escherichia coli (ETEC) produces the ADP-ribosyltransferase toxin known as heat-labile enterotoxin (LT). In addition to the toxic effect of LT resulting in increases of cyclic AMP (cAMP) and disturbance of cellular metabolic processes, this toxin promotes bacterial adherence to intestinal epithelial cells (A. M. Johnson, R. S. Kaushik, D. H. Francis, J. M. Fleckenstein, and P. R. Hardwidge, J. Bacteriol. 191:178-186, 2009). Therefore, we hypothesized that the identification of a compound that inhibits the activity of the toxin would have a suppressive effect on the ETEC colonization capabilities. Using in vivo and in vitro approaches, we present evidence demonstrating that a fluorenone-based compound, DC5, which inhibits the accumulation of cAMP in intoxicated cultured cells, significantly decreases the colonization abilities of adenylyl cyclase toxin-producing bacteria, such as ETEC. These findings established that DC5 is a potent inhibitor both of toxin-induced cAMP accumulation and of ETEC adherence to epithelial cells. Thus, DC5 may be a promising compound for treatment of diarrhea caused by ETEC and other adenylyl cyclase toxin-producing bacteria.
Collapse
|