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Zayene M, Le Bideau F, Retailleau P, Jannet HB, Alami M, Romdhane A, Messaoudi S. Site-Selective Palladium(II)-Catalyzed Methylene C(sp 3)-H Diarylation of a Tropane Scaffold. J Org Chem 2022; 87:16399-16409. [PMID: 36473230 DOI: 10.1021/acs.joc.2c02081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of 2,4-di-arylated tropane derivatives was synthesized through a site-selective palladium-catalyzed β-C(sp3)-H di-arylation process. This type of structure has been scarcely reported in literature. They nevertheless represent an interesting class of biologically relevant molecules as illustrated by the observed activity at the micromolecular level of eight derivatives toward human colorectal cancer cell line HCT116.
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Affiliation(s)
- Mayssa Zayene
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France.,Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Avenue of Environment, Faculty of Science of Monastir, University of Monastir, 5019 Monastir, Tunisia
| | - Franck Le Bideau
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Universite Paris-Saclay, avenue de la terrasse, 91198 Gif-sur-Yvette, France
| | - Hichem Ben Jannet
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Avenue of Environment, Faculty of Science of Monastir, University of Monastir, 5019 Monastir, Tunisia
| | - Mouad Alami
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France
| | - Anis Romdhane
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Avenue of Environment, Faculty of Science of Monastir, University of Monastir, 5019 Monastir, Tunisia
| | - Samir Messaoudi
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France
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Shivanyuk A, Gerasov A, Boiko R, Dolgonos G, Mandzhulo A, Fetyukhin V, Lukin O. Tropane-Based Dispirocyclic Oxiranes and Spirocyclic Ketones. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0040-1719848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractThe Prilezhaev epoxidation of N-Boc-protected 3-cyclobutylidenetropane 1a affords a 1:2 mixture of compounds 2a and 2b, in which tropane and cyclobutane fragments are spiro-connected to the oxirane ring in endo- and exo-fashion, respectively. The exo-isomer 2b is obtained in 89% yield and 97% selectivity via the dioxirane oxidation of 1a. BF3-catalyzed isomerization of exo-oxirane 2b results in a 1:1 mixture of the spirocyclic ketones endo 3a and exo 3b containing spiro-connected tropane and cyclopentanone rings, while endo-epoxide 2a gives exclusively endo-ketone 3a. Prilezhaev and dioxirane epoxidations of N-Boc-protected 3-cyclopropylidenetropane 1b affords a mixture of endo- and exo-oxiranes 2c and 2d. Compounds 2c and 2d are not isolated in individual forms since they isomerize into a mixture of spirocyclic ketones endo 3c and exo 3d. Removal of the Boc groups from ketones 3a–d gives the corresponding hydrochlorides of aminoketones 4a–d in quantitative yields. Quantum chemical calculations predict that the rearrangement of endo-epoxides into the corresponding endo-ketones involving BF3-containing intermediates has by 4.4–7.9 kcal/mol lower activation barriers than the respective conversion of the exo-epoxides into exo-ketones. The cyclopropyl-containing dispiroepoxides 2c and 2d are predicted to interconvert faster into the corresponding ketones compared to their less strained cyclobutyl counterparts 2a and 2b.
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Affiliation(s)
| | - Andrii Gerasov
- I.F. Lab Ltd., Representative of Life Chemicals Inc. in Ukraine
| | - Rodion Boiko
- I.F. Lab Ltd., Representative of Life Chemicals Inc. in Ukraine
| | | | - Aleksandr Mandzhulo
- I.F. Lab Ltd., Representative of Life Chemicals Inc. in Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine
| | | | - Oleg Lukin
- I.F. Lab Ltd., Representative of Life Chemicals Inc. in Ukraine
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