1
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Khairnar P, Saathoff JM, Cook DW, Hochstetler SR, Pandya U, Robinson SJ, Satam V, Donsbach KO, Gupton BF, Jin LM, Shanahan CS. Practical Synthesis of 6-Amino-1-hydroxy-2,1-benzoxaborolane: A Key Intermediate of DNDI-6148. Org Process Res Dev 2024; 28:1213-1223. [PMID: 38660377 PMCID: PMC11036395 DOI: 10.1021/acs.oprd.4c00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/03/2024] [Accepted: 03/11/2024] [Indexed: 04/26/2024]
Abstract
Visceral leishmaniasis (VL), a parasitic, poverty-linked, neglected disease, is endemic across multiple regions of the world and fatal if untreated. There is an urgent need for a better and more affordable treatment for VL. DNDI-6148 is a promising drug candidate being evaluated for the treatment of VL; however, the current process for producing the key intermediate of DNDI-6148, 6-amino-1-hydroxy-2,1-benzoxaborolane, is expensive and difficult to scale up. Herein, we describe two practical approaches to synthesizing 6-amino-1-hydroxy-2,1-benzoxaborolane from inexpensive and readily available raw materials. Starting with 4-tolunitrile, the first approach is a five-step sequence involving a Hofmann rearrangement, resulting in an overall yield of 40%. The second approach utilizes 2-methyl-5-nitroaniline as the starting material and features borylation of aniline and continuous flow hydrogenation as the key steps, with an overall yield of 46%. Both routes bypass the nitration of 1-hydroxy-2,1-benzoxaborolane, which is challenging and expensive to scale. In particular, the second approach is more practical and scalable because of the mild operating conditions and facile isolation process.
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Affiliation(s)
- Pankaj
V. Khairnar
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - John M. Saathoff
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - Daniel W. Cook
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - Samuel R. Hochstetler
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - Urvish Pandya
- Drugs
for Neglected Diseases initiative, 15 Chemin Camille-Vidart, 1202 Geneva, Switzerland
| | - Stephen J. Robinson
- Drugs
for Neglected Diseases initiative, 15 Chemin Camille-Vidart, 1202 Geneva, Switzerland
| | - Vijay Satam
- Drugs
for Neglected Diseases initiative, 15 Chemin Camille-Vidart, 1202 Geneva, Switzerland
| | - Kai O. Donsbach
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - B. Frank Gupton
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - Li-Mei Jin
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
| | - Charles S. Shanahan
- Medicines
for All Institute, Virginia Commonwealth
University, Richmond, Virginia 23284-3068, United States
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2
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Kumar R, Mahata B, Gayathridevi S, Vipin Raj K, Vanka K, Sen SS. Lanthanide Mimicking by Magnesium for Oxazolidinone Synthesis. Chemistry 2024; 30:e202303478. [PMID: 37897110 DOI: 10.1002/chem.202303478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 10/29/2023]
Abstract
In the last decade, magnesium complexes have emerged as a viable alternative to transition-metal catalysts for the hydrofunctionalization of unsaturated bonds. However, their potential for advanced catalytic reactions has not been thoroughly investigated. To address this gap, we have developed a novel magnesium amide compound (3) using a PNP framework that is both bulky and flexible. Our research demonstrates that compound 3 can effectively catalyze the synthesis of biologically significant oxazolidinone derivatives. This synthesis involves a tandem reaction of hydroalkoxylation and cyclohydroamination of isocyanate using propargyl alcohol. Furthermore, we conducted comprehensive theoretical calculations to gain insights into the reaction mechanism. It is important to note that these types of transformations have not been reported for magnesium and would significantly enhance the catalytic portfolio of the 7th most abundant element.
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Affiliation(s)
- Rohit Kumar
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Biplab Mahata
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - S Gayathridevi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - K Vipin Raj
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Sakya S Sen
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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3
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Zhai S, Forsyth C, Liu Z, Vidović D. Synthesis of Mono- and Acyclic Bis-aminoboranes via Controlled Hydroboration of Imines. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Siyuan Zhai
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
| | - Craig Forsyth
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
| | - Zhizhou Liu
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Dragoslav Vidović
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
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4
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Gilbert A, Langowski P, Delgado M, Chabaud L, Pucheault M, Paquin JF. Amine-borane complex-initiated SF 5Cl radical addition on alkenes and alkynes. Beilstein J Org Chem 2020; 16:3069-3077. [PMID: 33414854 PMCID: PMC7753108 DOI: 10.3762/bjoc.16.256] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 12/03/2020] [Indexed: 11/30/2022] Open
Abstract
The SF5Cl radical addition on unsaturated compounds was performed using an air-stable amine-borane complex as the radical initiator. This method showed to be complementary to the classic Et3B-mediated SF5Cl addition on alkenes and alkynes. A total of seven alkene and three alkyne derivatives were tested in the reaction, with yields ranging from 3% to 85%.
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Affiliation(s)
- Audrey Gilbert
- Départment de chimie, Université Laval, Québec, QC, G1V 0A6, Canada
| | | | - Marine Delgado
- Institut des Sciences Moléculaires - Groupe ORGA - UMR 5255, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
| | - Laurent Chabaud
- Institut des Sciences Moléculaires - Groupe ORGA - UMR 5255, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
| | - Mathieu Pucheault
- Institut des Sciences Moléculaires - Groupe ORGA - UMR 5255, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
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5
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Birepinte M, Liautard V, Chabaud L, Pucheault M. Zirconium-Catalyzed Synthesis of Alkenylaminoboranes: From a Reliable Preparation of Alkenylboronates to a Direct Stereodivergent Access to Alkenyl Bromides. Org Lett 2020; 22:2838-2843. [PMID: 32207309 DOI: 10.1021/acs.orglett.0c00908] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A simple procedure has been optimized for the preparation of alkenylaminoborane from alkynes using diisopropylaminoborane and HZrCp2Cl. Coupled with a magnesium-catalyzed dehydrogenation, it allowed for the use of air- and moisture-stable diisopropylamine. This synthesis has been extended to a one-pot sequence leading directly to bromoalkenes with controlled stereochemistry. As such, it provides an easy, scalable, cheap process to access alkenylboronates and both (E)- and (Z)-bromoalkenes from commercially available alkynes.
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Affiliation(s)
- Mélodie Birepinte
- Institut des Sciences Moléculaires, UMR 5255, CNRS, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
| | - Virginie Liautard
- Institut des Sciences Moléculaires, UMR 5255, CNRS, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
| | - Laurent Chabaud
- Institut des Sciences Moléculaires, UMR 5255, CNRS, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
| | - Mathieu Pucheault
- Institut des Sciences Moléculaires, UMR 5255, CNRS, Université de Bordeaux, 351 Cours de la libération, 33405 Talence, France
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6
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Birepinte M, Liautard V, Chabaud L, Pucheault M. Magnesium‐Catalyzed Tandem Dehydrogenation‐Dehydrocoupling: An Atom Economical Access to Alkynylboranes. Chemistry 2020; 26:3236-3240. [DOI: 10.1002/chem.201905772] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Mélodie Birepinte
- Institute of Molecular ScienceCNRS, Université de Bordeaux 351 Cours de la libération 33405 Talence Cedex France
| | - Virginie Liautard
- Institute of Molecular ScienceCNRS, Université de Bordeaux 351 Cours de la libération 33405 Talence Cedex France
| | - Laurent Chabaud
- Institute of Molecular ScienceCNRS, Université de Bordeaux 351 Cours de la libération 33405 Talence Cedex France
| | - Mathieu Pucheault
- Institute of Molecular ScienceCNRS, Université de Bordeaux 351 Cours de la libération 33405 Talence Cedex France
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7
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Birepinte M, Robert F, Pinet S, Chabaud L, Pucheault M. Non-biaryl atropisomerism at the C–B bond in sterically hindered aminoarylboranes. Org Biomol Chem 2020; 18:3007-3011. [DOI: 10.1039/d0ob00421a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Sterically hindered aminoarylboranes with atropisomerism about the C–B bond were prepared and resolved by chiral stationary phase HPLC.
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Affiliation(s)
- Mélodie Birepinte
- Institute of Molecular Science
- CNRS
- Université de Bordeaux
- 33405 Talence cedex
- France
| | - Frédéric Robert
- Institute of Molecular Science
- CNRS
- Université de Bordeaux
- 33405 Talence cedex
- France
| | - Sandra Pinet
- Institute of Molecular Science
- CNRS
- Université de Bordeaux
- 33405 Talence cedex
- France
| | - Laurent Chabaud
- Institute of Molecular Science
- CNRS
- Université de Bordeaux
- 33405 Talence cedex
- France
| | - Mathieu Pucheault
- Institute of Molecular Science
- CNRS
- Université de Bordeaux
- 33405 Talence cedex
- France
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8
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Buchner MR, Müller M, Raymond O, Severinsen RJ, Nixon DJ, Henderson W, Brothers PJ, Rowlands GJ, Plieger PG. Synthesis of a Boronic Acid Anhydride Based Ligand and Its Application in Beryllium Coordination. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900772] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Magnus R. Buchner
- Nachwuchsgruppe Berylliumchemie Fachbereich Chemie Philipps‐Universität Marburg Hans‐Meerwein‐Straße 4 35032 Marburg Germany
| | - Matthias Müller
- Nachwuchsgruppe Berylliumchemie Fachbereich Chemie Philipps‐Universität Marburg Hans‐Meerwein‐Straße 4 35032 Marburg Germany
| | - Onyekachi Raymond
- Chemistry, School of Science University of Waikato Private Bag 3105 3240 Hamilton New Zealand
| | - Rebecca J. Severinsen
- School of Fundamental Sciences Massey University Private Bag 11222 4410 Palmerston North New Zealand
| | - David J. Nixon
- School of Fundamental Sciences Massey University Private Bag 11222 4410 Palmerston North New Zealand
| | - William Henderson
- Chemistry, School of Science University of Waikato Private Bag 3105 3240 Hamilton New Zealand
| | | | - Gareth J. Rowlands
- School of Fundamental Sciences Massey University Private Bag 11222 4410 Palmerston North New Zealand
| | - Paul G. Plieger
- School of Fundamental Sciences Massey University Private Bag 11222 4410 Palmerston North New Zealand
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