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Sharma A, Pandey SK. Organocatalyzed epoxidation in the total synthesis of (-)- trans-, (+)- trans- and (+)- cis-disparlures. Org Biomol Chem 2023; 21:1514-1517. [PMID: 36691731 DOI: 10.1039/d2ob02195a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A simple, flexible and efficient organocatalyzed synthetic approach for the synthesis of (-)-trans-, (+)-trans- and (+)-cis-disparlures has been described. The pivotal reaction sequence comprises organocatalyzed asymmetric Jørgensen epoxidation, Wittig olefination, migration of epoxide and Mitsunobu inversion reaction. Excellent enantiomeric purity (≥99%) was achieved during the synthesis of disparlure enantiomers by the Jørgensen epoxidation key step.
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Affiliation(s)
- Ajay Sharma
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Satyendra Kumar Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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2
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Sharma A, Pandey SK. Organocatalyzed Protecting-Group-Free Total Synthesis of ( S,S)- and ( S,R)-Reboxetine, an Antidepressant Drug. J Org Chem 2022; 87:10430-10434. [PMID: 35866872 DOI: 10.1021/acs.joc.2c00886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient, simple, and concise organocatalyzed protecting-group-free synthetic approach to the stereoisomers of the antidepressant drug reboxetine and its implementation toward the asymmetric synthesis of (S,S)-reboxetine and (S,R)-reboxetine from commercially available trans-cinnamaldehyde are described. The synthesis features organocatalytic Jørgensen asymmetric epoxidation, epoxide migration, and Mitsunobu inversion as key steps.
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Affiliation(s)
- Ajay Sharma
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Satyendra Kumar Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
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3
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Kaur A, Gehlawat A, Prakash R, Pandey SK. Enantioselective Total Synthesis of Sacubitril. ChemistrySelect 2021. [DOI: 10.1002/slct.202102506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Amanpreet Kaur
- School of Chemistry and Biochemistry Thapar Institute of Engineering and Technology Patiala 147 001 India
| | - Anju Gehlawat
- School of Chemistry and Biochemistry Thapar Institute of Engineering and Technology Patiala 147 001 India
| | - Ranjana Prakash
- School of Chemistry and Biochemistry Thapar Institute of Engineering and Technology Patiala 147 001 India
| | - Satyendra Kumar Pandey
- School of Chemistry and Biochemistry Thapar Institute of Engineering and Technology Patiala 147 001 India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221 005 India
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4
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Da Silva Pinto S, Davies SG, Fletcher AM, Newton SK, Roberts PM, Thomson JE. Short asymmetric syntheses of sphinganine [(2S,3R)-2-aminooctadecane-1,3-diol] and its C(2)-epimer. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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5
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Chevis PJ, Pyne SG. Synthesis of enantioenriched α-heteroatom functionalised aldehydes by chiral organocatalysis and their synthetic applications. Org Chem Front 2021. [DOI: 10.1039/d1qo00101a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Asymmetric organocatalysis is a versatile method for the enantioselective α-functionalisation of aldehydes. The synthetic scope for chiral α-heteroatom substituted aldehydes is examined including their applications in synthesis.
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Affiliation(s)
- Philip J. Chevis
- School of Chemistry and Molecular Bioscience
- University of Wollongong
- Wollongong
- Australia
| | - Stephen G. Pyne
- School of Chemistry and Molecular Bioscience
- University of Wollongong
- Wollongong
- Australia
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Gehlawat A, Prakash R, Kumar Pandey S. A Short and Efficient Enantioselective Synthesis of (+)‐(2
S
,3
S
,5
S
)‐
epi
‐Muscarine. ChemistrySelect 2020. [DOI: 10.1002/slct.202001598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anju Gehlawat
- School of Chemistry and BiochemistryThapar Institute of Engineering and Technology Patiala 147 001 India
| | - Ranjana Prakash
- School of Chemistry and BiochemistryThapar Institute of Engineering and Technology Patiala 147 001 India
| | - Satyendra Kumar Pandey
- School of Chemistry and BiochemistryThapar Institute of Engineering and Technology Patiala 147 001 India
- Department of Chemistry Institute of ScienceBanaras Hindu University Varanasi 221 005 India
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Gehlawat A, Prakash R, Pandey SK. An efficient enantioselective approach to multifunctionalized γ-butyrolactone: concise synthesis of (+)-nephrosteranic acid. RSC Adv 2020; 10:19655-19658. [PMID: 35515420 PMCID: PMC9054058 DOI: 10.1039/d0ra04267f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 05/14/2020] [Indexed: 11/21/2022] Open
Abstract
A short, efficient and novel approach for multifunctionalized γ-butyrolactone paraconic acids and its application to the total synthesis of (+)-nephrosteranic acid from readily available PMB (R)-glycidyl ether as a starting material are described. Key transformations include asymmetric Michael addition catalyzed by chiral diphenylprolinol silyl ether and stereoselective α-methylation.
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Affiliation(s)
- Anju Gehlawat
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology Patiala-147 001 India
| | - Ranjana Prakash
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology Patiala-147 001 India
| | - Satyendra Kumar Pandey
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology Patiala-147 001 India .,Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi-221 005 India
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8
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Raschmanová JŠ, Martinková M, Gonda J, Pilátová MB, Kuchár J, Jáger D. Synthesis and in vitro biological evaluation of 3-amino-3-deoxydihydrosphingosines and their analogues. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Čonková M, Martinková M, Gonda J, Jacková D, Pilátová MB, Kupka D, Jáger D. Stereoselective synthesis and antiproliferative activity of the isomeric sphinganine analogues. Carbohydr Res 2019; 472:76-85. [PMID: 30529492 DOI: 10.1016/j.carres.2018.09.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 09/27/2018] [Accepted: 09/27/2018] [Indexed: 12/21/2022]
Abstract
A flexible synthetic approach to biologically active sphingoid base-like compounds with a 3-amino-1,2-diol framework was achieved through a [3,3]-sigmatropic rearrangement and late stage olefin cross-metathesis as the key transformations. The stereochemistry of the newly created stereogenic centre was assigned via a single crystal X-ray analysis of the (4S,5R)-5-(hydroxymethyl)-4-vinyloxazolidine-2-thione. In order to rationalise the observed stereoselectivity of the aza-Claisen rearrangement, DFT calculations were carried out. The targeted isomeric sphingoid bases were screened in vitro for anticancer activity on a panel of seven human malignant cell lines. Cell viability experiments revealed that C17-homologues are more active than their C12 congeners.
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Affiliation(s)
- Miroslava Čonková
- Institute of Chemical Sciences, Department of Organic Chemistry, P.J. Šafárik University, Moyzesova 11, 040 01, Košice, Slovak Republic
| | - Miroslava Martinková
- Institute of Chemical Sciences, Department of Organic Chemistry, P.J. Šafárik University, Moyzesova 11, 040 01, Košice, Slovak Republic.
| | - Jozef Gonda
- Institute of Chemical Sciences, Department of Organic Chemistry, P.J. Šafárik University, Moyzesova 11, 040 01, Košice, Slovak Republic
| | - Dominika Jacková
- Institute of Chemical Sciences, Department of Organic Chemistry, P.J. Šafárik University, Moyzesova 11, 040 01, Košice, Slovak Republic
| | - Martina Bago Pilátová
- Institute of Pharmacology, Faculty of Medicine, P.J. Šafárik University, SNP 1, 040 66, Košice, Slovak Republic
| | - Daniel Kupka
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovak Republic
| | - Dávid Jáger
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovak Republic
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