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Vinodkumar R, Nakate AK, Sharma H, Vanka K, Rama Krishna G, Kontham R. Brønsted Acid-Promoted Cyclodimerization of α,β-Unsaturated γ-Ketoesters: Construction of Fused Pyrano-ketal-lactones and γ-Ylidene-butenolides. ACS OMEGA 2024; 9:19859-19878. [PMID: 38737031 PMCID: PMC11079881 DOI: 10.1021/acsomega.3c08873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/12/2023] [Accepted: 01/09/2024] [Indexed: 05/14/2024]
Abstract
Unprecedented MsOH-promoted diastereoselective cascade dimerization and intramolecular lactonization of readily accessible α,β-unsaturated γ-ketoesters are presented. The results obtained in this work, control experiments, and density functional theory (DFT) calculations suggested that the initial enolization and E to Z isomerization/equilibration of olefin (C=C) of substrate α,β-unsaturated γ-ketoesters give a Z-isomer preferentially over an E-isomer. Subsequently, the Z-isomer undergoes intermolecular annulation with α,β-unsaturated γ-ketoesters via domino Michael addition/ketalization/lactonization steps to furnish fused tetracyclic pyrano-ketal-lactone. However, the Z-isomer prefers intramolecular trans-esterification in a competing pathway and gives bicyclic γ-ylidene-butenolide. The key features of this work include simple Brønsted acid catalysis, the formation of three bonds, two rings, and three contiguous stereogenic centers in a single step, DFT calculations, and the assignment of relative stereochemistry through X-ray diffraction (XRD) and two-dimensional (2D) nuclear magnetic resonance (NMR) analyses.
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Affiliation(s)
- Ramavath Vinodkumar
- Organic
Chemistry Division, CSIR-National Chemical
Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ashwini K. Nakate
- Organic
Chemistry Division, CSIR-National Chemical
Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Himanshu Sharma
- Physical
and Materials Chemistry Division, CSIR-National
Chemical Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kumar Vanka
- Physical
and Materials Chemistry Division, CSIR-National
Chemical Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Gamidi Rama Krishna
- Organic
Chemistry Division, CSIR-National Chemical
Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Center
for Materials Characterization, CSIR-National
Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Ravindar Kontham
- Organic
Chemistry Division, CSIR-National Chemical
Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Wang L, Huang Z, Guo X, Liu J, Dong J, Xu X. Diastereodivergent synthesis of chromeno[2,3- b]chromenes by tuning all of the reactivity centers of isocyanoacetate. Chem Commun (Camb) 2022; 58:6433-6436. [PMID: 35545968 DOI: 10.1039/d2cc01632j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel diastereodivergent tricyclization of isocyanoacetates with o-quinone methides was accomplished for the efficient synthesis of chromeno[2,3-b]chromene derivatives. All three reactive centers of isocyanoacetate reacted sequentially with two o-QMs, affording the products with four adjacent stereocenters in a diastereoselective manner. The asymmetric version was preliminarily investigated.
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Affiliation(s)
- Lei Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, China.
| | - Zitong Huang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, China.
| | - Xiaoyu Guo
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, China.
| | - Jian Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, China.
| | - Jinhuan Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, China.
| | - Xianxiu Xu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, China.
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3
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Total syntheses of hyperaspidinols A and B enabled by a bioinspired diastereoselective cascade sequence. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nair JB, Hakes L, Yazar-Klosinski B, Paisner K. Fully Validated, Multi-Kilogram cGMP Synthesis of MDMA. ACS OMEGA 2022; 7:900-907. [PMID: 35036754 PMCID: PMC8756783 DOI: 10.1021/acsomega.1c05520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
MDMA is increasingly used in clinical research, but no cGMP process has yet been reported. We describe here the first fully validated cGMP synthesis of up to 5 kg (≈30 000 patient doses) of MDMA in a four-step process beginning with a noncontrolled starting material. The overall yield was acceptable (41-53%, over four steps), and the chemical purity of the final product was excellent, exceeding 99.9% of the peak area by HPLC in each of the four validation trials. The availability of cGMP-compliant MDMA will facilitate ongoing clinical trials and provide for future therapeutic use, if encouraging results lead to FDA approval.
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Affiliation(s)
- Jay B. Nair
- MAPS
Public Benefit Corporation (MAPS PBC), 3141 Stevens Creek Blvd #40547, San Jose, California 95117, United States
| | - Linda Hakes
- Independent
Consultant for MAPS Public Benefit Corporation, 3141 Stevens Creek Blvd #40547, San Jose, California 95117, United States
| | - Berra Yazar-Klosinski
- Multidisciplinary
Association for Psychedelic Studies (MAPS), 3141 Stevens Creek Blvd #40563, San Jose, California 95117, United States
| | - Kathryn Paisner
- KP2
LLC, 2510 14th Ave., Oakland, California 94606, United States
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5
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Pertschi R, Wagner P, Ghosh N, Gandon V, Blond G. Gold(I)-Catalyzed Synthesis of Furopyrans: Insight into Hetero-Diels–Alder Reactions. Org Lett 2019; 21:6084-6088. [DOI: 10.1021/acs.orglett.9b02228] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Romain Pertschi
- CNRS, Laboratoire d’Innovation Thérapeutique, UMR 7200, Université de Strasbourg, 67000 Strasbourg, France
| | - Patrick Wagner
- CNRS, Laboratoire d’Innovation Thérapeutique, UMR 7200, Université de Strasbourg, 67000 Strasbourg, France
| | - Nayan Ghosh
- CNRS, Laboratoire d’Innovation Thérapeutique, UMR 7200, Université de Strasbourg, 67000 Strasbourg, France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, CNRS UMR 8182, Université Paris-Sud, Bâtiment 420, 91405 Orsay, France
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Gaëlle Blond
- CNRS, Laboratoire d’Innovation Thérapeutique, UMR 7200, Université de Strasbourg, 67000 Strasbourg, France
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Luong TM, Pilkington LI, Barker D. Stereoselective Total Synthesis of (+)-Aristolactam GI. J Org Chem 2019; 84:5747-5756. [PMID: 30973729 DOI: 10.1021/acs.joc.9b00653] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aristolactams are an important subgroup of aporphinoids, which all share a common phenanthrene chromophore motif that is thought to be responsible for the range of interesting physicochemical and biological properties exhibited by these compounds. Among all of the aristolactams discovered, (+)-aristolactam GI displays a unique structural feature of having the aristolactam scaffold linked via a benzodioxane ring to a phenyl propanoid unit, resulting in the compound being an aporphinoid-lignan hybrid. The synthesis of (+)-aristolactam GI was achieved first by synthesis of an orthogonally protected aristolactam, which was prepared using a Suzuki/aldol cascade to convert a differentially protected isoindolin-1-one to the required phenanthrene. The required enantiopure phenyl propanoid unit was prepared from readily available ( R)-methyl lactate. A selective Mitsunobu reaction was used to combine these two key fragments, prior to the formation of the linking benzodioxane in the final step. The absolute stereochemistry of the natural product was confirmed to be 7' S, 8' S.
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Affiliation(s)
- Tuan M Luong
- School of Chemical Sciences , University of Auckland , Auckland 1010 , New Zealand
| | - Lisa I Pilkington
- School of Chemical Sciences , University of Auckland , Auckland 1010 , New Zealand
| | - David Barker
- School of Chemical Sciences , University of Auckland , Auckland 1010 , New Zealand
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Davidson SJ, Pilkington LI, Dempsey-Hibbert NC, El-Mohtadi M, Tang S, Wainwright T, Whitehead KA, Barker D. Modular Synthesis and Biological Investigation of 5-Hydroxymethyl Dibenzyl Butyrolactones and Related Lignans. Molecules 2018; 23:molecules23123057. [PMID: 30467285 PMCID: PMC6321111 DOI: 10.3390/molecules23123057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 11/16/2022] Open
Abstract
Dibenzyl butyrolactone lignans are well known for their excellent biological properties, particularly for their notable anti-proliferative activities. Herein we report a novel, efficient, convergent synthesis of dibenzyl butyrolactone lignans utilizing the acyl-Claisen rearrangement to stereoselectively prepare a key intermediate. The reported synthetic route enables the modification of these lignans to give rise to 5-hydroxymethyl derivatives of these lignans. The biological activities of these analogues were assessed, with derivatives showing an excellent cytotoxic profile which resulted in programmed cell death of Jurkat T-leukemia cells with less than 2% of the incubated cells entering a necrotic cell death pathway.
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Affiliation(s)
- Samuel J Davidson
- School of Chemical Sciences, University of Auckland, Aucklamd 1010, New Zealand.
| | - Lisa I Pilkington
- School of Chemical Sciences, University of Auckland, Aucklamd 1010, New Zealand.
| | - Nina C Dempsey-Hibbert
- School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, UK.
| | - Mohamed El-Mohtadi
- School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, UK.
| | - Shiying Tang
- School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, UK.
| | - Thomas Wainwright
- School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, UK.
| | - Kathryn A Whitehead
- School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, UK.
| | - David Barker
- School of Chemical Sciences, University of Auckland, Aucklamd 1010, New Zealand.
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand.
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Abstract
The physicochemical properties of classical lignans, neolignans, flavonolignans and carbohydrate-lignan conjugates (CLCs) were analysed to assess their ADMET profiles and establish if these compounds are lead-like/drug-like and thus have potential to be or act as leads in the development of future therapeutics. It was found that while no studied compounds were lead-like, a very large proportion (>75%) fulfilled all the requirements to be deemed as present in drug-like space and almost all compounds studied were in the known drug space. Principal component analysis was an effective technique that enabled the investigation of the relationship between the studied molecular descriptors and was able to separate the lignans from their sugar derivatives and flavonolignans, primarily according to the parameters that are considered when defining chemical space (i.e., number of hydrogen bond donors, acceptors, rotatable bonds, polar surface area and molecular weight). These results indicate that while CLCs and flavonolignans are less drug-like, lignans show a particularly high level of drug-likeness, an observation that coupled with their potent biological activities, demands future pursuit into their potential for use as therapeutics.
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Affiliation(s)
- Lisa I Pilkington
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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Thorat SS, Kataria P, Kontham R. Synthesis of Furo[2,3-b]pyran-2-ones through Ag(I)- or Ag(I)–Au(I)-Catalyzed Cascade Annulation of Alkynols and α-Ketoesters. Org Lett 2018; 20:872-875. [DOI: 10.1021/acs.orglett.7b04027] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sagar S. Thorat
- Division
of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, India
- Academy of Scientific
and Innovative Research (AcSIR), New Delhi, India
| | - Priyanka Kataria
- Division
of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, India
- Academy of Scientific
and Innovative Research (AcSIR), New Delhi, India
| | - Ravindar Kontham
- Division
of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, India
- Academy of Scientific
and Innovative Research (AcSIR), New Delhi, India
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