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Sengupta S, Pabbaraja S, Mehta G. Domino Reactions through Recursive Anionic Cascades: The Advantageous Use of Nitronates. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Srihari Pabbaraja
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
| | - Goverdhan Mehta
- School of Chemistry University of Hyderabad Hyderabad 500046 India
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2
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Chavan SP, Kawale SA, Tripathi A, Kadam AL, Gonnade RG. Revisiting Classical Pummerer Cyclization Reaction: A Key Strategy for the Synthesis of (±)‐Quinagolide. ChemistrySelect 2022. [DOI: 10.1002/slct.202201600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Subhash P. Chavan
- CSIR-National Chemical Laboratory Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad, Uttar pradesh 201002 India
| | - Sanket A. Kawale
- CSIR-National Chemical Laboratory Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad, Uttar pradesh 201002 India
| | - Anupam Tripathi
- CSIR-National Chemical Laboratory Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad, Uttar pradesh 201002 India
| | - Appasaheb L. Kadam
- CSIR-National Chemical Laboratory Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad, Uttar pradesh 201002 India
| | - Rajesh G. Gonnade
- CSIR-National Chemical Laboratory Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad, Uttar pradesh 201002 India
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3
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Chavan SP, Kalbhor DB, Gonnade RG. Rapid Synthesis of the epi-Biotin Sulfone via Tandem S, N-Carbonyl Migration/aza-Michael/Spirocyclization and Haller-Bauer Reaction. ACS OMEGA 2022; 7:17215-17222. [PMID: 35647474 PMCID: PMC9134234 DOI: 10.1021/acsomega.2c01030] [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: 02/20/2022] [Accepted: 04/28/2022] [Indexed: 06/15/2023]
Abstract
A synthesis of 2-epi-biotin sulfone was accomplished from commercially available l-cysteine. The synthesis features an unprecedented tandem S,N-carbonyl migration/aza-Michael/spirocyclization reaction from an l-cysteine-derived enone with aq. ammonia, in which three new sigma bonds and two rings are formed. In addition, the synthesis includes a highly diastereoselective late-stage Haller-Bauer reaction of sulfone for direct introduction of the carbon side chain.
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Affiliation(s)
- Subhash P. Chavan
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Dinesh B. Kalbhor
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajesh G. Gonnade
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- Center
for Materials Characterization, CSIR-National
Chemical Laboratory, Pune 411008, India
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4
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Chavan SP, Kawale SA, Pisal MM, Kadam AL, Gonnade RG. Formal Synthesis of (-)-Quinagolide: Diastereoselective Ring Expansion via a Bicyclic Aziridinium Ion Strategy to Access the Octahydrobenzo[ g]quinoline Architecture. J Org Chem 2021; 86:9344-9352. [PMID: 34228439 DOI: 10.1021/acs.joc.1c00603] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The diastereoselective formal synthesis of (-)-quinagolide, a D2 receptor agonist, has been achieved. The synthesis started from l-pyroglutamic acid and relied on utilization of (a) a stereospecific catalytic hydrogenation and diastereoselective Horner-Emmons-Michael cascade to obtain functionalized prolinate, (b) a Lewis acid mediated Pummerer cyclization to construct a tricyclic fused ring system, and (c) a diastereoselective ring expansion via a bicyclic aziridinium intermediate to access the required 3-substituted piperidine scaffold.
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Affiliation(s)
- Subhash P Chavan
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sanket A Kawale
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Mahesh M Pisal
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Appasaheb L Kadam
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajesh G Gonnade
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.,Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
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5
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Practical synthesis of 5-hydroxy-2(5H)-furanone from furan. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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6
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Makai S, Falk E, Morandi B. Direct Synthesis of Unprotected 2-Azidoamines from Alkenes via an Iron-Catalyzed Difunctionalization Reaction. J Am Chem Soc 2020; 142:21548-21555. [DOI: 10.1021/jacs.0c11025] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Szabolcs Makai
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | - Eric Falk
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
| | - Bill Morandi
- ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093 Zürich, Switzerland
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7
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Chavan SP, Kadam AL, Shinde SS, Gonnade RG. Furan-Derived Chiral Bicycloaziridino Lactone Synthon: Collective Syntheses of Oseltamivir Phosphate (Tamiflu), (S)-Pipecolic acid and its 3-Hydroxy Derivatives. Chem Asian J 2020; 15:415-424. [PMID: 31794104 DOI: 10.1002/asia.201901523] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/02/2019] [Indexed: 11/07/2022]
Abstract
A unified synthetic strategy for oseltamivir phosphate (tamiflu), (S)-pipecolic acid, and its 3-hydroxy derivatives from furan derived common chiral bicycloaziridino lactone synthon is described here. Key features are the short (4-steps), enantiopure, and decagram-scale synthesis of common chiral synthon from furan and its first-ever application in the total synthesis of biologically active compounds by taking the advantages of high functionalization ability of chiral synthon.
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Affiliation(s)
- Subhash P Chavan
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
| | - Appasaheb L Kadam
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
| | - Shrikrishna S Shinde
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Rajesh G Gonnade
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, 411008, India
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8
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Chavan SP, Kadam AL, Gonnade RG. Enantioselective Formal Total Synthesis of (−)-Quinagolide. Org Lett 2019; 21:9089-9093. [DOI: 10.1021/acs.orglett.9b03477] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Subhash P. Chavan
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Appasaheb L. Kadam
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Rajesh G. Gonnade
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
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9
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Chavan SP, Kadam AL, Kawale SA. Total Synthesis of (±)-Quinagolide: A Potent D 2 Receptor Agonist for the Treatment of Hyperprolactinemia. ACS OMEGA 2019; 4:8231-8238. [PMID: 31459911 PMCID: PMC6648496 DOI: 10.1021/acsomega.9b00903] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 04/15/2019] [Indexed: 05/15/2023]
Abstract
A potent dopamine (D2) receptor agonist (±)-quinagolide, which is used for the treatment of hyperprolactinemia, was synthesized using the ring closing metathesis (RCM) approach from meta-hydroxybenzaldehyde as the starting material. The key features of this synthesis are pyrolytic elimination, late-stage expedient synthesis of functionalized trans-fused tetrahydropyridine-3-carboxylates from olefin 6, via conjugate addition-elimination upon acetate 11, followed by RCM and phenyliodine bis(trifluoroacetate) (PIFA)-mediated Hofmann rearrangement of piperidine-3-carboxamide, which enables the synthesis of 3-aminopiperidine skeleton of quinagolide. For the total synthesis of natural products such as ergot alkaloids, late-stage synthesis of functionalized trans-fused tetrahydropyridine-3-carboxylates using RCM and PIFA-mediated Hofmann rearrangement of piperidine-3-carboxamide, which allows quick access to the synthetically challenging 3-aminopiperidine skeleton, are the main achievements of the present work.
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Affiliation(s)
- Subhash P. Chavan
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Appasaheb L. Kadam
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Sanket A. Kawale
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory, Pune 411008, India
- Academy
of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
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10
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García-Lacuna J, Domínguez G, Blanco-Urgoiti J, Pérez-Castells J. Synthesis of treprostinil: key Claisen rearrangement and catalytic Pauson–Khand reactions in continuous flow. Org Biomol Chem 2019; 17:9489-9501. [DOI: 10.1039/c9ob02124h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Treprostinil is prepared in 12 linear steps using a plug flow reactor for the key Claisen rearrangement and Pauson–Khand reactions.
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Affiliation(s)
- Jorge García-Lacuna
- Dpto. Química y Bioquímica
- Facultad de Farmacia. Universidad San Pablo CEU. Urb. Montepríncipe
- 28668 Madrid
- Spain
| | - Gema Domínguez
- Dpto. Química y Bioquímica
- Facultad de Farmacia. Universidad San Pablo CEU. Urb. Montepríncipe
- 28668 Madrid
- Spain
| | | | - Javier Pérez-Castells
- Dpto. Química y Bioquímica
- Facultad de Farmacia. Universidad San Pablo CEU. Urb. Montepríncipe
- 28668 Madrid
- Spain
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