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Fraňová P, Marchalín Š, Šafář P, Cvečko M, Moncol J, Žídeková I, Othman M, Daïch A. Smart and concise entry to chiral spiro[cyclopentane-indolizidine]-tetraol diastereomers as a new aza-spirocyclic framework. NEW J CHEM 2021. [DOI: 10.1039/d1nj02180j] [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
Synthesis of chiral oxacarba-spiroindolizidine tetraols was achieved by alkene cis-dihydroxylation, diol protection, and lactam carbonyl reduction followed ultimately by acetonide deprotection.
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Affiliation(s)
- Paula Fraňová
- Department of Organic Chemistry, Faculty of Chemical & Food Technology, Slovak University of Technology, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Štefan Marchalín
- Department of Organic Chemistry, Faculty of Chemical & Food Technology, Slovak University of Technology, Radlinského 9, SK-81237 Bratislava, Slovakia
- Normandie Univ, UNILEHAVRE, URCOM EA 3221, INC3M CNRS-FR 3038, UFR des Sciences et Techniques, Université Le Havre Normandie, BP: 1123, 25 rue Philipe Lebon, F-76063 Le Havre Cedex, France
| | - Peter Šafář
- Department of Organic Chemistry, Faculty of Chemical & Food Technology, Slovak University of Technology, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Matej Cvečko
- Department of Organic Chemistry, Faculty of Chemical & Food Technology, Slovak University of Technology, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Ján Moncol
- Department of Inorganic Chemistry, Faculty of Chemical & Food Technology, Slovak University of Technology, Radlinského 9, SK-81237, Bratislava, Slovakia
| | - Ivana Žídeková
- Central Laboratories, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, SK – 81237 Bratislava, Slovakia
| | - Mohamed Othman
- Normandie Univ, UNILEHAVRE, URCOM EA 3221, INC3M CNRS-FR 3038, UFR des Sciences et Techniques, Université Le Havre Normandie, BP: 1123, 25 rue Philipe Lebon, F-76063 Le Havre Cedex, France
| | - Adam Daïch
- Normandie Univ, UNILEHAVRE, URCOM EA 3221, INC3M CNRS-FR 3038, UFR des Sciences et Techniques, Université Le Havre Normandie, BP: 1123, 25 rue Philipe Lebon, F-76063 Le Havre Cedex, France
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Šafář P, Marchalín Š, Cvečko M, Moncol J, Dujnič V, Šoral M, Daïch A. Synthesis and sequential diastereoselective incorporation of hydroxyl groups into hexahydrofuro[3,2-f]indolizin-7(2H)-one to give mono-, di- and tetra-hydroxyfuroindolizidines. Org Biomol Chem 2020; 18:6384-6393. [PMID: 32756691 DOI: 10.1039/d0ob00896f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Dihydrofuro[2,3-f]indolizidinone obtained from biosourced reagents even at multigram-scale was used as an advanced building-block with up to five points of chemical diversification. This resulted in the sequential synthesis of a series of mono-, di- and tetra-hydroxyfuranoindolizidines belonging to a very scarce and elaborate tetrahydrofuran-fused indolizidine family with up to six controlled stereogenic centers. These sequences include, among others, diastereoselective olefin epoxidation, stereoselective epoxide ring opening into tetrahydrofuran trans-diols, their protection as an ester or acetonide, and lactam carbonyl reduction ultimately followed by acetate or acetonide deprotection.
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Affiliation(s)
- Peter Šafář
- Department of Organic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia.
| | - Štefan Marchalín
- Department of Organic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia. and Normandie Univ, UNILEHAVRE, CNRS, URCOM, 76600 Le Havre, France.
| | - Matej Cvečko
- Department of Organic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia.
| | - Ján Moncol
- Department of Inorganic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Viera Dujnič
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 38, Bratislava, Slovakia
| | - Michal Šoral
- Central Laboratories, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Adam Daïch
- Normandie Univ, UNILEHAVRE, CNRS, URCOM, 76600 Le Havre, France.
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Kang K, Sakamoto K, Nishimoto Y, Yasuda M. Synthesis of (Z)-β-(Carbonylamino)alkenylindium through Regioselective anti-Carboindation of Ynamides and Its Transformation to Multisubstituted Enamides. Chemistry 2020; 26:4930-4934. [PMID: 31833583 DOI: 10.1002/chem.201905175] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/12/2019] [Indexed: 11/06/2022]
Abstract
The regioselective anti-carboindation of ynamides by using InBr3 and silylated nucleophiles was developed to synthesize (Z)-β-(carbonylamino)alkenylindiums. The X-ray crystallographic analysis of an alkenylindium suggested that the reaction proceeded in an anti-addition fashion. In contrast to reported syn-carbometalations of ynamides by using organometallics, a cooperation of InBr3 and silylated nucleophiles to ynamides achieved an anti-addition, which was supported by DFT calculations. The scope of substrates included various ynamides and silylated nucleophiles, such as silyl ketene acetals and silyl ketene imines. The transformation of synthesized alkenylindiums by iodination, radical coupling, and Pd-catalyzed cross-coupling successfully afforded trisubstituted enamines with high regio- and stereoselectivities.
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Affiliation(s)
- Kyoungmin Kang
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan
| | - Kosuke Sakamoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan
| | - Yoshihiro Nishimoto
- Frontier Research Base for Global Young Researchers Center, for Open Innovation Research and Education (COiRE), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan
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