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Kawauchi D, Noda K, Komatsu Y, Yoshida K, Ueda H, Tokuyama H. Aerobic Dehydrogenation of N-Heterocycles with Grubbs Catalyst: Its Application to Assisted-Tandem Catalysis to Construct N-Containing Fused Heteroarenes. Chemistry 2020; 26:15793-15798. [PMID: 32484596 DOI: 10.1002/chem.202001961] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 01/10/2023]
Abstract
An aerobic dehydrogenation of nitrogen-containing heterocycles catalyzed by Grubbs catalyst is developed. The reaction is applicable to various nitrogen-containing heterocycles. The exceptionally high functional group compatibility of this method was confirmed by the oxidation of an unprotected dihydroindolactam V to indolactam V. Furthermore, by taking advantage of the oxygen-mediated structural change of the Grubbs catalyst, we integrated ring-closing metathesis and subsequent aerobic dehydrogenation to develop the novel assisted-tandem catalysis using molecular oxygen as a chemical trigger. The utility of the assisted-tandem catalysis was demonstrated by the concise synthesis of N-containing fused heteroarenes including a natural antibiotic, pyocyanine.
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Affiliation(s)
- Daichi Kawauchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Kenta Noda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Yoshiyuki Komatsu
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Kei Yoshida
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
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Kumar V, Singh A, Mithra SVA, Krishnamurthy SL, Parida SK, Jain S, Tiwari KK, Kumar P, Rao AR, Sharma SK, Khurana JP, Singh NK, Mohapatra T. Genome-wide association mapping of salinity tolerance in rice (Oryza sativa). DNA Res 2015; 22:133-45. [PMID: 25627243 PMCID: PMC4401324 DOI: 10.1093/dnares/dsu046] [Citation(s) in RCA: 147] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 12/26/2014] [Indexed: 02/07/2023] Open
Abstract
Salinity tolerance in rice is highly desirable to sustain production in areas rendered saline due to various reasons. It is a complex quantitative trait having different components, which can be dissected effectively by genome-wide association study (GWAS). Here, we implemented GWAS to identify loci controlling salinity tolerance in rice. A custom-designed array based on 6,000 single nucleotide polymorphisms (SNPs) in as many stress-responsive genes, distributed at an average physical interval of <100 kb on 12 rice chromosomes, was used to genotype 220 rice accessions using Infinium high-throughput assay. Genetic association was analysed with 12 different traits recorded on these accessions under field conditions at reproductive stage. We identified 20 SNPs (loci) significantly associated with Na+/K+ ratio, and 44 SNPs with other traits observed under stress condition. The loci identified for various salinity indices through GWAS explained 5–18% of the phenotypic variance. The region harbouring Saltol, a major quantitative trait loci (QTLs) on chromosome 1 in rice, which is known to control salinity tolerance at seedling stage, was detected as a major association with Na+/K+ ratio measured at reproductive stage in our study. In addition to Saltol, we also found GWAS peaks representing new QTLs on chromosomes 4, 6 and 7. The current association mapping panel contained mostly indica accessions that can serve as source of novel salt tolerance genes and alleles. The gene-based SNP array used in this study was found cost-effective and efficient in unveiling genomic regions/candidate genes regulating salinity stress tolerance in rice.
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Affiliation(s)
- Vinod Kumar
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - Anshuman Singh
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - S V Amitha Mithra
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - S L Krishnamurthy
- Central Soil Salinity Research Institute, Karnal, Haryana 132001, India
| | - Swarup K Parida
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - Sourabh Jain
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - Kapil K Tiwari
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - Pankaj Kumar
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - Atmakuri R Rao
- Indian Agricultural Statistics Research Institute, New Delhi 110012, India
| | - S K Sharma
- Central Soil Salinity Research Institute, Karnal, Haryana 132001, India
| | | | - Nagendra K Singh
- National Research Centre on Plant Biotechnology, New Delhi 110012, India
| | - Trilochan Mohapatra
- National Research Centre on Plant Biotechnology, New Delhi 110012, India Central Rice Research Institute, Cuttack, Odisha 753006, India
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Schmidt B, Krehl S, Jablowski E. Assisted tandem catalytic RCM-aromatization in the synthesis of pyrroles and furans. Org Biomol Chem 2012; 10:5119-30. [DOI: 10.1039/c2ob25543j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Schmidt B, Geißler D. Olefin-Metathesis-Based Synthesis of Furans by an RCM/Deprotonation/Phosphorylation Sequence and Their Diels-Alder Reactions. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101078] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- Jingwei Li
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL 60607‐7061, USA, Fax: +1‐312‐996‐0431
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL 60607‐7061, USA, Fax: +1‐312‐996‐0431
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van Otterlo WAL, de Koning CB. Metathesis in the synthesis of aromatic compounds. Chem Rev 2009; 109:3743-82. [PMID: 19618929 DOI: 10.1021/cr900178p] [Citation(s) in RCA: 247] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Willem A L van Otterlo
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Wits 2050, South Africa.
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Kotha S, Meshram M, Tiwari A. Advanced approach to polycyclics by a synergistic combination of enyne metathesis and Diels-Alder reaction. Chem Soc Rev 2009; 38:2065-92. [PMID: 19551182 DOI: 10.1039/b810094m] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enyne metathesis (EM) has widely been used to prepare various synthetic and natural products. Further, a sequential use of EM and Diels-Alder (DA) reactions generates highly functionalized and intricate polycarbocycles and heterocyclic frameworks. In this critical review we describe the application of a unique combination of EM and DA reactions to prepare various amino acid derivatives, natural products and heterocycles. Some of the heterocyclic targets include cyclic peroxides, siloxanes and various nitrogen (or oxygen) containing compounds. Use of ethylene and cyclooctadiene (COD) for improving the yield of EM products are also discussed (69 references).
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India.
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Donohoe TJ, Fishlock LP, Procopiou PA. Ring-closing metathesis: novel routes to aromatic heterocycles. Chemistry 2008; 14:5716-26. [PMID: 18381742 DOI: 10.1002/chem.200800130] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Olefin metathesis has been established as an important and general reaction in synthetic organic chemistry. Recently, it has attracted interest as a powerful tool for the construction of aromatic heterocycles. The importance of heteroaromatic motifs in medicinal chemistry and biology, as well as the efficiency and wealth of metathesis transformations, have resulted in significant success in this rapidly developing area.
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Affiliation(s)
- Timothy J Donohoe
- Chemistry Research Laboratory, University of Oxford, Oxford, OX1 3TA UK.
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Evanno L, Deville A, Bodo B, Nay B. An enyne metathesis/Diels–Alder reaction sequence towards the synthesis of cup-shaped 5/5/6-tricyclic architectures. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.04.107] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Moonen K, Dieltiens N, Stevens CV. Synthesis of 2-Phosphonopyrroles via a One-Pot RCM/Oxidation Sequence. J Org Chem 2006; 71:4006-9. [PMID: 16674086 DOI: 10.1021/jo060160e] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A four-step synthesis of 2-phosphonopyrroles is presented starting from suitable aldehydes. The key step in the synthesis involves a one-pot ring-closing metathesis/oxidation sequence of a functionalized alpha-aminoalkenyl phosphonate. Notwithstanding the presence of a nucleophilic nitrogen atom and high substitution patterns in the substrate, the results of the RCM reaction are excellent using mild reaction conditions. Furthermore, a synergism is observed between the RCM catalyst and the oxidizing agent, causing higher oxidation rates and allowing reaction for substrates that normally fail to ring close under standard RCM conditions.
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Affiliation(s)
- Kristof Moonen
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium.
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