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Nong ZS, Chen XR, Wang PS, Hong X, Gong LZ. Enantioconvergent Palladium-Catalyzed Alkylation of Tertiary Allylic C-H Bonds. Angew Chem Int Ed Engl 2023; 62:e202312547. [PMID: 37752890 DOI: 10.1002/anie.202312547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 09/28/2023]
Abstract
Enantioconvergent catalysis enables the conversion of racemic molecules into a single enantiomer in perfect yield and is considered an ideal approach for asymmetric synthesis. Despite remarkable advances in this field, enantioconvergent transformations of inert tertiary C-H bonds remain largely unexplored due to the high bond dissociation energy and the surrounding steric repulsion that pose unparalleled constraints on bond cleavage and formation. Here, we report an enantioconvergent Pd-catalyzed alkylation of racemic tertiary allylic C-H bonds of α-alkenes, providing a unique approach to access a broad range of enantioenriched γ,δ-unsaturated carbonyl compounds featuring quaternary carbon stereocenters. Mechanistic studies reveal that a stereoablative event occurs through the rate-limiting cleavage of tertiary allylic C-H bonds to generate σ-allyl-Pd species, and the achieved E/Z-selectivity of σ-allyl-Pd species effectively regulates the diastereoselectivity via a nucleophile coordination-enabled SN 2'-allylation pathway.
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Affiliation(s)
- Zhong-Sheng Nong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Xin-Ran Chen
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Pu-Sheng Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Xin Hong
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei, 230026, China
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Heravi MM, Mohammadi L. Application of Pauson-Khand reaction in the total synthesis of terpenes. RSC Adv 2021; 11:38325-38373. [PMID: 35493249 PMCID: PMC9044263 DOI: 10.1039/d1ra05673e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 10/28/2021] [Indexed: 12/28/2022] Open
Abstract
The Pauson-Khand reaction (PKR) is a formal [2 + 2 + 1] cycloaddition involving an alkyne, an alkene and carbon monoxide mediated by a hexacarbonyldicobaltalkyne complex to yield cyclopentenones in a single step. This versatile reaction has become a method of choice for the synthesis of cyclopentenone and its derivatives since its discovery in the early seventies. The aim of this review is to point out the applications of PKR in the total synthesis of terpenes.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Leila Mohammadi
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
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Uwamori M, Osada R, Sugiyama R, Nagatani K, Nakada M. Enantioselective Total Synthesis of Cotylenin A. J Am Chem Soc 2020; 142:5556-5561. [DOI: 10.1021/jacs.0c01774] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masahiro Uwamori
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Ryunosuke Osada
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Ryoji Sugiyama
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Kotaro Nagatani
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masahisa Nakada
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
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Shao W, Clive DLJ. Synthesis of substituted resorcinol monomethyl ethers from 2-bromo-3-methoxycyclohex-2-en-1-ones. J Org Chem 2015; 80:3211-6. [PMID: 25695316 DOI: 10.1021/acs.joc.5b00192] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2-Bromo-3-methoxycyclohex-2-en-1-ones are readily alkylated at C-6 with reactive halides, and then treatment with DBU (2 equiv) in PhMe at room temperature results in smooth loss of bromide and aromatization to resorcinol monomethyl ethers of defined substitution pattern.
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Affiliation(s)
- Wenjie Shao
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Derrick L J Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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Huang MY, Chen L, Li R, Jia X, Hong R. Synthesis of (±)-Bakuchiol via a Pot-Economy Approach. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Synthesis of ∆3-2-hydroxybakuchiol analogues and their growth inhibitory activity against rat UMR106 cells. Molecules 2014; 19:2213-25. [PMID: 24561330 PMCID: PMC6272004 DOI: 10.3390/molecules19022213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 02/09/2014] [Accepted: 02/11/2014] [Indexed: 11/16/2022] Open
Abstract
A series of ∆3-2-hydroxybakuchiol analogues have been synthesized and tested for their growth inhibitory activity against rat UMR106 cells by using the MTT method. Some of them exhibit enhanced activities compared with the natural product, and the preliminary SAR profile shows that the chain tail on the natural product could be subtly modified to enhance the activity and the aromatic moiety or the terminal olefin on the main chain can also be modified without any evident loss of activity. The stereo-configuration of the quaternary chiral center has an important influence on the activity.
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The Orthoester Johnson-Claisen Rearrangement in the Synthesis of Bioactive Molecules, Natural Products, and Synthetic Intermediates - Recent Advances. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301033] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Magoulas GE, Garnelis T, Athanassopoulos CM, Papaioannou D, Mattheolabakis G, Avgoustakis K, Hadjipavlou-Litina D. Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.06.066] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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China Raju B, Saidachary G, Ashok Kumar J. Wittig homologation of 2-(chloromethyl)-2H-chromen-2-ol derivatives: a new facile synthesis of substituted 2,3-dihydrobenzoxepine-4-carboxylates. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.047] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chen J, Gao P, Yu F, Yang Y, Zhu S, Zhai H. Total Synthesis of (±)-Merrilactone A. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200378] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Chen J, Gao P, Yu F, Yang Y, Zhu S, Zhai H. Total synthesis of (±)-merrilactone A. Angew Chem Int Ed Engl 2012; 51:5897-9. [PMID: 22565358 DOI: 10.1002/anie.201200378] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 02/24/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Jianwei Chen
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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Magoulas GE, Bariamis SE, Athanassopoulos CM, Haskopoulos A, Dedes PG, Krokidis MG, Karamanos NK, Kletsas D, Papaioannou D, Maroulis G. Syntheses, antiproliferative activity and theoretical characterization of acitretin-type retinoids with changes in the lipophilic part. Eur J Med Chem 2010; 46:721-37. [PMID: 21208698 DOI: 10.1016/j.ejmech.2010.12.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 11/22/2010] [Accepted: 12/07/2010] [Indexed: 11/19/2022]
Abstract
Acitretin analogs, incorporating changes in the lipophilic part, were efficiently synthesized from commercially available aromatic aldehydes or methyl ketones using the Wittig or Horner-Wadsworth-Emmons reaction. Their antiproliferative activity was evaluated against human breast MCF-7 epithelial cells. Analogs 3, 4, 8 and 11 exhibited strong, dose-dependent, antiproliferative activity on the tested cell line. Analog 3, incorporating three methoxy groups in the aromatic ring, exhibited the strongest inhibitory effect at 10 μM. High-level all electron conventional ab initio and density functional theory quantum chemical calculations were performed to obtain the molecular structure, electron charge distribution and polarization properties of all compounds of interest in this work. The most active analogs were planar and were characterized by larger dipole moments than the other synthesized molecules. Another factor of importance to the analysis of the activity of these molecules is the dipole polarizability.
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Affiliation(s)
- George E Magoulas
- Laboratory of Synthetic Organic Chemistry, Department of Chemistry, University of Patras, GR-265 04 Patras, Greece
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