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Fekri S, Mansoori Y, Esquivel D, Navarro MA. Efficient Hydrodehalogenation of Aryl Halides Catalyzed by Bis(NHC)-Pd(II) Complex Supported on Magnetic Mesoporous Silica. Catal Letters 2023. [DOI: 10.1007/s10562-023-04319-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Vetrichelvan M, Sankar U, Bokkala V, Akunuri A, Ramesh N, Pitchai M, Mathur A, Gupta A. Chlorotrimethylsilane and Sodium Iodide: An Expedient Combination for the Chemo/Regioselective Dehalogenation of Benzothiazole and Thiazole Derivatives. ChemistrySelect 2023. [DOI: 10.1002/slct.202203856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Muthalagu Vetrichelvan
- Department of Discovery Synthesis Biocon Bristol Myers Squibb R&D Centre Syngene International Ltd. Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV Bangalore 560 099 India
| | - Ulaganathan Sankar
- Department of Discovery Synthesis Biocon Bristol Myers Squibb R&D Centre Syngene International Ltd. Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV Bangalore 560 099 India
| | - Vijayabhaskar Bokkala
- Department of Discovery Synthesis Biocon Bristol Myers Squibb R&D Centre Syngene International Ltd. Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV Bangalore 560 099 India
| | - Arun Akunuri
- Department of Discovery Synthesis Biocon Bristol Myers Squibb R&D Centre Syngene International Ltd. Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV Bangalore 560 099 India
| | - Natesan Ramesh
- Department of Discovery Synthesis Biocon Bristol Myers Squibb R&D Centre Syngene International Ltd. Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV Bangalore 560 099 India
| | - Manivel Pitchai
- Department of Discovery Synthesis Biocon Bristol Myers Squibb R&D Centre Syngene International Ltd. Biocon Park, Plot No. 2 & 3, Jigani Link Road, Bommasandra IV Bangalore 560 099 India
| | - Arvind Mathur
- Department of Discovery Synthesis Small Molecule Drug Discovery Bristol Myers Squibb Research and Early Development P.O. Box 5400 Princeton New Jersey 08543-4000 USA
| | - Anuradha Gupta
- Department of Discovery Synthesis Small Molecule Drug Discovery Bristol Myers Squibb Research and Early Development P.O. Box 5400 Princeton New Jersey 08543-4000 USA
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Bartolo ND, Demkiw KM, Read JA, Valentín EM, Yang Y, Dillon AM, Hu CT, Ward MD, Woerpel KA. Conformationally Biased Ketones React Diastereoselectively with Allylmagnesium Halides. J Org Chem 2022; 87:3042-3065. [PMID: 35167300 PMCID: PMC9022492 DOI: 10.1021/acs.joc.1c02844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The addition of the highly reactive reagent allylmagnesium halide to α-substituted acyclic chiral ketones proceeded with high stereoselectivity. The stereoselectivity cannot be analyzed by conventional stereochemical models because these reactions do not conform to the requirements of those models. Instead, the stereoselectivity arises from the approach of the nucleophile to the most accessible diastereofaces of the lowest-energy conformations of the ketones. High stereoselectivity is expected, and the stereochemical outcome can be predicted, with conformationally biased ketones that have sterically distinguishable diastereofaces wherein only one face is accessible for nucleophilic addition. The conformations of the ketones can be determined by a combination of computational modeling and, in some cases, structure determination by X-ray crystallography.
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Affiliation(s)
- Nicole D. Bartolo
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | - Krystyna M. Demkiw
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | - Jacquelyne A. Read
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | | | - Yingying Yang
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | - Alexandra M. Dillon
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | - Chunhua T. Hu
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | - Michael D. Ward
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
| | - K. A. Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 USA
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Reddy BRP, Auffrant A, Gosmini C. Dehalogenation and Desulfonation from Aryl and Alkyl Compounds with a Cobalt Catalyst in the Presence of Alcohol. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Audrey Auffrant
- Laboratoire de Chimie Moléculaire CNRS, École Polytechnique, IP Paris 91128 Palaiseau France
| | - Corinne Gosmini
- Laboratoire de Chimie Moléculaire CNRS, École Polytechnique, IP Paris 91128 Palaiseau France
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Karuo Y, Shiraki R, Yoshida A, Tsunokawa R, Nakahara-Yamada M, Tarui A, Sato K, Kawai K, Omote M, Nishimura H. Identification and Synthesis of DDI-6, a Quinolinol Analog Capable of Activating Both Caenorhabditis elegans and Mouse Spermatozoa. Chem Pharm Bull (Tokyo) 2021; 69:557-563. [PMID: 34078802 DOI: 10.1248/cpb.c21-00127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sperm activation is an essential process by which the male gametes become capable of fertilization. Because the process in Caenorhabditis elegans is readily reproducible in vitro, this organism serves as an excellent model to investigate it. C. elegans sperm activation in vivo occurs during spermiogenesis. Membranous organelles (MOs) contained within spermatids fuse with the plasma membrane, resulting in extracellular release of their contents and relocation of some proteins indispensable for fertilization from the MO membrane onto the sperm surface. Intriguingly, these cytological alternations are exhibited similarly in mouse spermatozoa during the acrosome reaction, which also represents a form of sperm activation, prompting us to hypothesize that C. elegans and mice share a common mechanism for sperm activation. To explore this, we first screened a chemical library to identify compounds that activate C. elegans spermatozoa. Because a quinolinol analog named DDI-6 seemed to be a candidate sperm activator, we synthesized it to use for further analyses. This involved direct dechlorination and hydrogenolysis of commercially available 5-chloro-8-quinolinol, both of which are key steps to yield 1,2,3,4-tetrahydro-8-quinolinol, and we subsequently introduced the sulfonamide group to the compound. When C. elegans spermatids were stimulated with solvent alone or the newly synthesized DDI-6, approx. 3% and approx. 28% of spermatids became MO-fused spermatozoa, respectively. Moreover, DDI-6 triggered the acrosome reaction in approx. 20% of mouse spermatozoa, while approx. 12% became acrosome-reacted after mock stimulation. Thus, DDI-6 serves as a moderately effective activator for both C. elegans and mouse spermatozoa.
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Affiliation(s)
- Yukiko Karuo
- Faculty of Pharmaceutical Sciences, Setsunan University
| | - Riona Shiraki
- Department of Life Science, Faculty of Science and Engineering, Setsunan University
| | - Ayaka Yoshida
- Department of Life Science, Faculty of Science and Engineering, Setsunan University
| | - Ryo Tsunokawa
- Faculty of Pharmaceutical Sciences, Setsunan University
| | | | - Atsushi Tarui
- Faculty of Pharmaceutical Sciences, Setsunan University
| | - Kazuyuki Sato
- Faculty of Pharmaceutical Sciences, Setsunan University
| | - Kentaro Kawai
- Faculty of Pharmaceutical Sciences, Setsunan University
| | - Masaaki Omote
- Faculty of Pharmaceutical Sciences, Setsunan University
| | - Hitoshi Nishimura
- Department of Life Science, Faculty of Science and Engineering, Setsunan University
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Exploration of Cu-catalyzed regioselective hydrodehalogenation of o-haloanilides using EtOH as hydrogen source. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Bartolo ND, Demkiw KM, Valentín EM, Hu CT, Arabi AA, Woerpel KA. Diastereoselective Additions of Allylmagnesium Reagents to α-Substituted Ketones When Stereochemical Models Cannot Be Used. J Org Chem 2021; 86:7203-7217. [PMID: 33978419 DOI: 10.1021/acs.joc.1c00553] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The stereoselectivities of reactions of allylmagnesium reagents with chiral ketones cannot be easily explained by stereochemical models. Competition experiments indicate that the complexation step is not reversible, so nucleophiles cannot access the widest range of possible encounter complexes and therefore cannot be analyzed easily using available models. Nevertheless, additions of allylmagnesium reagents to a ketone can still be stereoselective provided that the carbonyl group adopts a conformation that leads to one face being completely blocked from the approach of the allylmagnesium reagent.
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Affiliation(s)
- Nicole D Bartolo
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003, United States
| | - Krystyna M Demkiw
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003, United States
| | - Elizabeth M Valentín
- St. Mary's College of California, 1928 St. Marys Road, Moraga, California 94575, United States
| | - Chunhua T Hu
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003, United States
| | - Alya A Arabi
- Biochemistry Department, College of Medicine and Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain, United Arab Emirates.,Centre for Computational Science, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - K A Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003, United States
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Shamir D, Elias I, Albo Y, Meyerstein D, Burg A. ORMOSIL-entrapped copper complex as electrocatalyst for the heterogeneous de-chlorination of alkyl halides. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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