1
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Mondal B, Chatterjee A, Saha NC, Jana M, Saha J. Thianthrenation-promoted photoinduced alkene difunctionalization and aryl allylation with Morita-Baylis-Hillman adducts. Chem Commun (Camb) 2024; 60:7184-7187. [PMID: 38904419 DOI: 10.1039/d4cc01792g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
An organophotoredox-catalyzed alkoxyallylation of feed-stock olefins, through thianthrenation using a Morita-Baylis-Hillman adduct as an allylating agent, is described. Site-selective addition of MeOH to an alkene-thianthrenium salt and its subsequent conversion into a nucleophilic radical species forms the basis of this unique difunctionalization strategy. The scope is also expanded into radical aryl allylation.
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Affiliation(s)
- Biplab Mondal
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research (CBMR), Lucknow 226014, India
| | - Ayan Chatterjee
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research (CBMR), Lucknow 226014, India
| | | | - Manoranjan Jana
- Department of Chemistry, University of Kalyani, West Bengal, India
| | - Jaideep Saha
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Mohali 160062, India.
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2
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Garbini M, Brunetti A, Pedrazzani R, Monari M, Marcaccio M, Bertuzzi G, Bandini M. Reductive cyclodimerization of chalcones: exploring the "self-adaptability" of galvanostatic electrosynthesis. Chem Commun (Camb) 2024; 60:404-407. [PMID: 38084060 DOI: 10.1039/d3cc04920e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The "self-adaptability" of galvanostatic electrolysis was shown to assist a multistage unprecedented chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. The process, all involving the reductive events, delivered densely functionalized cyclopentanes featuring five contiguous stereocenters (25 examples, yields of up to 95%, dr values up to >20 : 1). Dedicated and combined experimental as well as electrochemical investigation revealed the key role of a dynamic kinetic resolution of the aldol intermediate for the reaction mechanism.
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Affiliation(s)
- Mauro Garbini
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
| | - Andrea Brunetti
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
- Center for Chemical Catalysis - C3, Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Riccardo Pedrazzani
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
- Center for Chemical Catalysis - C3, Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Magda Monari
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
- Center for Chemical Catalysis - C3, Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Massimo Marcaccio
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
- Center for Chemical Catalysis - C3, Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Giulio Bertuzzi
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
- Center for Chemical Catalysis - C3, Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Marco Bandini
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy.
- Center for Chemical Catalysis - C3, Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
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3
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Giovanelli R, Lombardi L, Pedrazzani R, Monari M, Reis MC, López CS, Bertuzzi G, Bandini M. Nickel Catalyzed Carbonylation/Carboxylation Sequence via Double CO 2 Incorporation. Org Lett 2023; 25:6969-6974. [PMID: 37669466 PMCID: PMC10546374 DOI: 10.1021/acs.orglett.3c02394] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Indexed: 09/07/2023]
Abstract
A carbonylation-carboxylation synthetic sequence, via double CO2 fixation, is described. The productive merger of a Ni-catalyzed cross-electrophile coupling manifold, with the use of AlCl3, triggered a cascade reaction with the formation of three consecutive C-C bonds in a single operation. This strategy traces an unprecedented synthetic route to ketones under Lewis acid assisted carbon dioxide valorization. Computational insights revealed a unique double function of AlCl3, and labeling (13CO2) experiments validate the genuine incorporation of CO2 in both functional groups.
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Affiliation(s)
- Riccardo Giovanelli
- Dipartimento
di Chimica “Giacomo Ciamician”, Alma Mater Studiorum − Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
- Center
for Chemical Catalysis − C3, Dipartimento di Chimica “Giacomo
Ciamician”, Alma Mater Studiorum
− Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Lorenzo Lombardi
- Dipartimento
di Chimica “Giacomo Ciamician”, Alma Mater Studiorum − Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Riccardo Pedrazzani
- Dipartimento
di Chimica “Giacomo Ciamician”, Alma Mater Studiorum − Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
- Center
for Chemical Catalysis − C3, Dipartimento di Chimica “Giacomo
Ciamician”, Alma Mater Studiorum
− Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Magda Monari
- Dipartimento
di Chimica “Giacomo Ciamician”, Alma Mater Studiorum − Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
- Center
for Chemical Catalysis − C3, Dipartimento di Chimica “Giacomo
Ciamician”, Alma Mater Studiorum
− Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Marta Castiñeira Reis
- Departamento
de Química Orgánica, Universidad
de Vigo, As Lagoas-Marcosende, 36310, Vigo, Spain
| | - Carlos Silva López
- Departamento
de Química Orgánica, Universidad
de Vigo, As Lagoas-Marcosende, 36310, Vigo, Spain
| | - Giulio Bertuzzi
- Dipartimento
di Chimica “Giacomo Ciamician”, Alma Mater Studiorum − Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
- Center
for Chemical Catalysis − C3, Dipartimento di Chimica “Giacomo
Ciamician”, Alma Mater Studiorum
− Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
| | - Marco Bandini
- Dipartimento
di Chimica “Giacomo Ciamician”, Alma Mater Studiorum − Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
- Center
for Chemical Catalysis − C3, Dipartimento di Chimica “Giacomo
Ciamician”, Alma Mater Studiorum
− Università di Bologna, Via P. Gobetti 85, 40129, Bologna, Italy
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4
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Rapisarda L, Fermi A, Ceroni P, Giovanelli R, Bertuzzi G, Bandini M. Electrochemical C(sp 3)-H functionalization of ethers via hydrogen-atom transfer by means of cathodic reduction. Chem Commun (Camb) 2023; 59:2664-2667. [PMID: 36785969 DOI: 10.1039/d2cc06999g] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The chemo- and stereoselective electrochemical allylation/alkylation of ethers is presented via a C(sp3)-H activation event. The electrosynthetic protocol enables the realization of a large library of functionalized ethers (35 examples) in high yields (up to 84%) via cathodic activation of a new type of redox-active carbonate (RAC), capable of triggering HAT (Hydrogen-Atom-Transfer) events through the generation of electrophilic oxy radicals. The process displayed high functional group tolerance and mild reaction conditions. A mechanistic elucidation via voltammetric analysis completes the study.
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Affiliation(s)
- Leonardo Rapisarda
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, via Selmi 2, 40126, Bologna, Italy.
| | - Andrea Fermi
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, via Selmi 2, 40126, Bologna, Italy. .,Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna Via Selmi 2, 40126, Bologna, Italy
| | - Paola Ceroni
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, via Selmi 2, 40126, Bologna, Italy. .,Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna Via Selmi 2, 40126, Bologna, Italy
| | - Riccardo Giovanelli
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, via Selmi 2, 40126, Bologna, Italy. .,Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna Via Selmi 2, 40126, Bologna, Italy
| | - Giulio Bertuzzi
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, via Selmi 2, 40126, Bologna, Italy. .,Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna Via Selmi 2, 40126, Bologna, Italy
| | - Marco Bandini
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum - Università di Bologna, via Selmi 2, 40126, Bologna, Italy. .,Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna Via Selmi 2, 40126, Bologna, Italy
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