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Serusi L, Palombi L, Pierri G, Mola AD, Massa A. Asymmetric Cascade Aza-Henry/Lactamization Reaction in the Highly Enantioselective Organocatalytic Synthesis of 3-(Nitromethyl)isoindolin-1-ones from α-Amido Sulfones. J Org Chem 2022; 87:8420-8428. [PMID: 35699594 PMCID: PMC9490826 DOI: 10.1021/acs.joc.2c00518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
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The asymmetric synthesis
of novel 3-substituted isoindolinones
is herein reported. A new cascade reaction was developed that consisted
of the asymmetric nitro-Mannich reaction of suitable α-amido
sulfones designed from 2-formyl benzoates, followed by the in situ cyclization of the adducts. Very high enantioselectivities,
up to 98% ee, and very good yields were obtained in the presence of
the readily available neutral bifunctional organocatalyst derived
from trans-1,2-diaminocyclohexane, which is known
as Takemoto’s catalyst. The investigation of the reactivity
of the obtained products allowed either the selective Boc-deprotection
or reduction of the nitro group, leading to further functionalized
3-substituted isoindolinones without affecting the enantiomeric purity.
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Affiliation(s)
- Lorenzo Serusi
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, Fisciano, Salerno 84084, Italy
| | - Laura Palombi
- Dipartimento di Scienze Fisiche e Chimiche, Università dell'Aquila, Via Vetoio, Coppito, L'Aquila 10-67100, Italy
| | - Giovanni Pierri
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, Fisciano, Salerno 84084, Italy
| | - Antonia Di Mola
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, Fisciano, Salerno 84084, Italy
| | - Antonio Massa
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, Fisciano, Salerno 84084, Italy
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Macchia A, Summa FF, Di Mola A, Tedesco C, Pierri G, Ofial AR, Monaco G, Massa A. Base-Promoted Cascade Reactions for the Synthesis of 3,3-Dialkylated Isoindolin-1-ones and 3-Methyleneisoindolin-1-ones. J Org Chem 2021; 86:15128-15138. [PMID: 34613731 PMCID: PMC8576826 DOI: 10.1021/acs.joc.1c01794] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Cascade reactions
of ortho-carbonyl-substituted
benzonitriles with ((chloromethyl)sulfonyl)benzenes as pronucleophiles
led to new isoindolin-1-ones with a tetrasubstituted C-3 position
or to (Z)-3-(sulfonyl-methylene)isoindolin-1-ones.
The reactions start from readily available materials, are carried
out under mild conditions, and do not require metal catalysis. Promoted
only by the cheap and environmentally benign K2CO3 as the base, up to six elemental steps can be combined in a single
pot. Hence, a sequential one-pot cascade/β-elimination/alkylation
furnished useful intermediates for the synthesis of aristolactam natural
products. The observed selectivity and the mechanism were investigated
by DFT studies.
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Affiliation(s)
- Antonio Macchia
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Francesco F Summa
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Antonia Di Mola
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Consiglia Tedesco
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Giovanni Pierri
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Armin R Ofial
- Department Chemie, Ludwig-Maximilians-Universität München, 81377 München, Germany
| | - Guglielmo Monaco
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Antonio Massa
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
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Combined electrochemical/chemical methods for the synthesis and the molecular diversifying of isoindolinone-based heterocyclic scaffolds. Mol Divers 2014; 18:323-33. [DOI: 10.1007/s11030-013-9502-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 12/23/2013] [Indexed: 11/25/2022]
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