1
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Parte LG, Fernández S, Sandonís E, Guerra J, López E. Transition-Metal-Catalyzed Transformations for the Synthesis of Marine Drugs. Mar Drugs 2024; 22:253. [PMID: 38921564 PMCID: PMC11204618 DOI: 10.3390/md22060253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/23/2024] [Accepted: 05/25/2024] [Indexed: 06/27/2024] Open
Abstract
Transition metal catalysis has contributed to the discovery of novel methodologies and the preparation of natural products, as well as new chances to increase the chemical space in drug discovery programs. In the case of marine drugs, this strategy has been used to achieve selective, sustainable and efficient transformations, which cannot be obtained otherwise. In this perspective, we aim to showcase how a variety of transition metals have provided fruitful couplings in a wide variety of marine drug-like scaffolds over the past few years, by accelerating the production of these valuable molecules.
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Affiliation(s)
- Lucía G. Parte
- Department of Organic Chemistry, Science Faculty, University of Valladolid (UVa), Paseo de Belén 7, 47011 Valladolid, Spain; (L.G.P.); (E.S.)
| | - Sergio Fernández
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London (QMUL), Mile End Road, London E1 4NS, UK;
| | - Eva Sandonís
- Department of Organic Chemistry, Science Faculty, University of Valladolid (UVa), Paseo de Belén 7, 47011 Valladolid, Spain; (L.G.P.); (E.S.)
| | - Javier Guerra
- Department of Organic Chemistry, Science Faculty, University of Valladolid (UVa), Paseo de Belén 7, 47011 Valladolid, Spain; (L.G.P.); (E.S.)
| | - Enol López
- Department of Organic Chemistry, ITAP, School of Engineering (EII), University of Valladolid (UVa), Dr Mergelina, 47002 Valladolid, Spain
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2
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Trienes S, Xu J, Ackermann L. Photoinduced C-H arylation of 1,3-azoles via copper/photoredox dual catalysis. Chem Sci 2024; 15:7293-7299. [PMID: 38756807 PMCID: PMC11095366 DOI: 10.1039/d4sc00393d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/15/2024] [Indexed: 05/18/2024] Open
Abstract
The visible light-induced C-H arylation of azoles has been accomplished by dual-catalytic system with the aid of an inexpensive ligand-free copper(i)-catalyst in combination with a suitable photoredox catalyst. An organic photoredox catalyst, 10-phenylphenothiazine (PTH), was identified as effective, cost-efficient and environmentally-benign alternative to commonly-used, expensive Ir(iii)-based complexes. The method proved applicable for the C-H arylation of various azole derivatives, including oxazoles, benzoxazoles, thiazoles, benzothiazoles as well as more challenging imidazoles and benzimidazoles. Moreover, the derivatization of complex molecules and the gram scale synthesis of the natural product balsoxin reflected the synthetic utility of the developed strategy. Mechanistic studies were indicative of a single electron transfer-based (SET) mechanism with an aryl radical as key intermediate.
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Affiliation(s)
- Sven Trienes
- Institut für Organische und Biomolekulare Chemie, Wöhler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Tammannstraße 2 37077 Göttingen Germany
- DZHK (German Centre for Cardiovascular Research) Potsdamer Straße 58 10875 Berlin Germany
| | - Jiawei Xu
- Institut für Organische und Biomolekulare Chemie, Wöhler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Tammannstraße 2 37077 Göttingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Wöhler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Tammannstraße 2 37077 Göttingen Germany
- DZHK (German Centre for Cardiovascular Research) Potsdamer Straße 58 10875 Berlin Germany
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3
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Staronova L, Yamazaki K, Xu X, Shi H, Bickelhaupt FM, Hamlin TA, Dixon DJ. Cobalt-Catalyzed Enantio- and Regioselective C(sp 3 )-H Alkenylation of Thioamides. Angew Chem Int Ed Engl 2024; 63:e202316021. [PMID: 38143241 DOI: 10.1002/anie.202316021] [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: 10/23/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/26/2023]
Abstract
An enantioselective cobalt-catalyzed C(sp3 )-H alkenylation of thioamides with but-2-ynoate ester coupling partners employing thioamide directing groups is presented. The method is operationally simple and requires only mild reaction conditions, while providing alkenylated products as single regioisomers in excellent yields (up to 85 %) and high enantiomeric excess [up to 91 : 9 enantiomeric ratio (er), or up to >99 : 1 er after a single recrystallization]. Diverse downstream derivatizations of the products are demonstrated, delivering a range of enantioenriched constructs. Extensive computational studies using density functional theory provide insight into the detailed reaction mechanism, origin of enantiocontrol, and the unusual regioselectivity of the alkenylation reaction.
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Affiliation(s)
- Lucia Staronova
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Xing Xu
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Heyao Shi
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - F Matthias Bickelhaupt
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
- Institute of Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg, 2006, South Africa
| | - Trevor A Hamlin
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
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4
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Zhu X, Li Y, Luo H, Li J, Hua Y, Liu G, Li L, Liu R. Propargylic Dialkyl Effect for Cyclobutene Formation through Ir(III)-Catalyzed Cycloisomerization of 1,6-Enynes. Org Lett 2024; 26:966-970. [PMID: 38270400 DOI: 10.1021/acs.orglett.3c04330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
The propargylic dialkyl effect (PDAE) has a significant impact on the cyclization reaction of enynes, partly reflected in changing the types of products. Herein, we described the influence of the propargylic dialkyl effect on the Ir(III)-catalyzed cycloisomerization of 1,6-enynes to provide strained cyclobutenes. A series of substituted 1,6-enynes were proved to be excellent substrate candidates in the presence of [Cp*IrCl2]2 in toluene. Mechanistic investigation, based on deuterium labeling experiments and control experiments, indicated that the propargylic dialkyl effect might boost C(sp)-H activation by preventing the coordination of active iridium species to the C(sp)≡C(sp) bond of enynes. This finding contributes to the fundamental understanding of enyne cyclization reactions and offers valuable insight into the propargylic dialkyl effect.
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Affiliation(s)
- Xuanyu Zhu
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Yi Li
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Hongtao Luo
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Jing Li
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Yuhui Hua
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Guohua Liu
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
| | - Lingling Li
- Instrumental Analysis Center of Shanghai Jiao Tong University, Shanghai 200240, China
| | - Rui Liu
- Shanghai Frontiers Science Center of Biomimetic Catalysis, Joint Laboratory of International Cooperation of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China
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5
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Guan Q, Zhou LL, Dong YB. Metalated covalent organic frameworks: from synthetic strategies to diverse applications. Chem Soc Rev 2022; 51:6307-6416. [PMID: 35766373 DOI: 10.1039/d1cs00983d] [Citation(s) in RCA: 63] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Covalent organic frameworks (COFs) are a class of organic crystalline porous materials discovered in the early 21st century that have become an attractive class of emerging materials due to their high crystallinity, intrinsic porosity, structural regularity, diverse functionality, design flexibility, and outstanding stability. However, many chemical and physical properties strongly depend on the presence of metal ions in materials for advanced applications, but metal-free COFs do not have these properties and are therefore excluded from such applications. Metalated COFs formed by combining COFs with metal ions, while retaining the advantages of COFs, have additional intriguing properties and applications, and have attracted considerable attention over the past decade. This review presents all aspects of metalated COFs, from synthetic strategies to various applications, in the hope of promoting the continued development of this young field.
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Affiliation(s)
- Qun Guan
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, China.
| | - Le-Le Zhou
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, China.
| | - Yu-Bin Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, China.
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6
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Prajapati R, Gola AK, Kumar A, Jaiswal S, Tadigoppula N. o-Acetoxylation of oxo-benzoxazines via C–H activation by palladium( ii)/aluminium oxide. NEW J CHEM 2022. [DOI: 10.1039/d2nj00134a] [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
Direct activation of sp2 C–H bonds by a palladium catalyst has received significant attention in organic chemistry.
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Affiliation(s)
- Ramanand Prajapati
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, U.P., India
| | - Ajay Kant Gola
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, U.P., India
| | - Amrendra Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, U.P., India
| | - Shubham Jaiswal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, U.P., India
| | - Narender Tadigoppula
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, U.P., India
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7
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Singh P, Kumar Chouhan K, Mukherjee A. Ruthenium Catalyzed Intramolecular C-X (X=C, N, O, S) Bond Formation via C-H Functionalization: An Overview. Chem Asian J 2021; 16:2392-2412. [PMID: 34251077 DOI: 10.1002/asia.202100513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/09/2021] [Indexed: 01/12/2023]
Abstract
Ruthenium catalyzed C-H activation is well known for its high tolerance towards the functional group and broad applicability in organic synthesis and molecular sciences, with significant applications in pharmaceutical industries, material sciences, and polymer industry. In the last few decades, enormous progress has been observed with ruthenium-catalyzed C-H activation chemistry. Notably, the vast majority of the C-H functionalization known in the literature are intermolecular, although the intramolecular variant provides fascinating new structural facet starting from the simple molecular scaffolds. Intramolecular C-H functionalization is atom economical and step efficient, results in less formation of undesired products which is easy to purify. This has created a lot of interest in organic chemistry in developing new synthetic strategies for such functionalization. The focus of this review is to present the relatively unexplored intramolecular functionalization of C-H bonds into C-X (X=C, N, O, S) bonds utilizing versatile ruthenium catalysts, their scope, and brief mechanistic discussion.
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Affiliation(s)
- Pallavi Singh
- Department of Chemistry, Indian Institute of Technology Bhilai GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India
| | - Kishor Kumar Chouhan
- Department of Chemistry, Indian Institute of Technology Bhilai GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India
| | - Arup Mukherjee
- Department of Chemistry, Indian Institute of Technology Bhilai GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India
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8
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Zhang J, Zhao WY, Wang C, Yi J, Yu ZL, Deng S, Zhang HL, Huo XK, Sun CP, Ma XC. Identification, semisynthesis, and anti-inflammatory evaluation of 2,3-seco-clavine-type ergot alkaloids from human intestinal fungus Aspergillus fumigatus CY018. Eur J Med Chem 2021; 224:113731. [PMID: 34352712 DOI: 10.1016/j.ejmech.2021.113731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 10/20/2022]
Abstract
Intestinal commensal fungi are vital to human health, and their secondary metabolites play a key role in the reciprocal relationship. In the present study, the first example of 2,3-seco ergot alkaloids belonging to clavine-type were isolated from the fermentation of human intestinal fungus Aspergillus fumigatus CY018, including two pairs of diastereoisomers, secofumigaclavines A (3) and B (4) and secofumigaclavines C (5) and D (6), one analogue features a highly unsaturated skeleton, secofumigaclavine E (7), along with two known ones, fumigaclavines C (1) and D (2). Their structures were identified based on extensive spectroscopic data in a combination of quantum chemical calculations. Moreover, a single-step operation of semi-synthetic reaction based on riboflavin (RF)-dependent photocatalysis was performed to obtain the novel 2,3-seco ergot alkaloids 3 and 5 from their biosynthetic precursors 1 and 2. All the isolated compounds were evaluated for their anti-inflammatory activity. Among them, secofumigaclavine B (4) could bind to MD2 with a low micromole level of the equilibrium dissociation constant measured by surface plasmon resonance (SPR), and suppress TLR4-mediated NF-κB signaling pathway in RAW264.7 cells, resulting in its anti-inflammatory effect. Molecular dynamics revealed that amino acid residue Tyr131 played a key role in the interaction of secofumigaclavine B (4) with MD2. These findings suggested that secofumigaclavine B (4) could be considered as a potential candidate for the development of MD2 inhibitors.
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Affiliation(s)
- Juan Zhang
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China; School of Life Science, Liaoning Normal University, Dalian, China
| | - Wen-Yu Zhao
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Chao Wang
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Jing Yi
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Zhen-Long Yu
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Sa Deng
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Hou-Li Zhang
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Xiao-Kui Huo
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Cheng-Peng Sun
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China.
| | - Xiao-Chi Ma
- Dalian Key Laboratory of Metabolic Target Characterization and Traditional Chinese Medicine Intervention, College (Institute) of Integrative Medicine, College of Pharmacy, Dalian Medical University, Dalian, China; Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China.
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9
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Ratsch F, Strache JP, Schlundt W, Neudörfl J, Adler A, Aziz S, Goldfuss B, Schmalz H. Enantioselective Cleavage of Cyclobutanols Through Ir-Catalyzed C-C Bond Activation: Mechanistic and Synthetic Aspects. Chemistry 2021; 27:4640-4652. [PMID: 33314360 PMCID: PMC7986405 DOI: 10.1002/chem.202004843] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Indexed: 12/20/2022]
Abstract
The Ir-catalyzed conversion of prochiral tert-cyclobutanols to β-methyl-substituted ketones proceeds under comparably mild conditions in toluene (45-110 °C) and is particularly suited for the enantioselective desymmetrization of β-oxy-substituted substrates to give products with a quaternary chirality center with up to 95 % ee using DTBM-SegPhos as a chiral ligand. Deuteration experiments and kinetic isotope effect measurements revealed major mechanistic differences to related RhI -catalyzed transformations. Supported by DFT calculations we propose the initial formation of an IrIII hydride intermediate, which then undergoes a β-C elimination (C-C bond activation) prior to reductive C-H elimination. The computational model also allows the prediction of the stereochemical outcome. The Ir-catalyzed cyclobutanol cleavage is broadly applicable but fails for substrates bearing strongly coordinating groups. The method is of particular value for the stereo-controlled synthesis of substituted chromanes related to the tocopherols and other natural products.
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Affiliation(s)
- Friederike Ratsch
- Department of ChemistryUniversity of CologneGreinstraße 450939KölnGermany
| | - Joss Pepe Strache
- Department of ChemistryUniversity of CologneGreinstraße 450939KölnGermany
| | - Waldemar Schlundt
- Department of ChemistryUniversity of CologneGreinstraße 450939KölnGermany
| | | | - Andreas Adler
- Department of ChemistryUniversity of CologneGreinstraße 450939KölnGermany
| | - Sarwar Aziz
- Department of ChemistryUniversity of CologneGreinstraße 450939KölnGermany
| | - Bernd Goldfuss
- Department of ChemistryUniversity of CologneGreinstraße 450939KölnGermany
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10
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Slack ED, Colacot TJ. Understanding the Activation of Air-Stable Ir(COD)(Phen)Cl Precatalyst for C–H Borylation of Aromatics and Heteroaromatics. Org Lett 2021; 23:1561-1565. [PMID: 33546555 DOI: 10.1021/acs.orglett.0c04210] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Eric D. Slack
- Johnson Matthey, 2001 Nolte Drive, West Deptford, New Jersey 08066, United States
| | - Thomas J. Colacot
- Johnson Matthey, 2001 Nolte Drive, West Deptford, New Jersey 08066, United States
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11
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Kathuria L, Samuelson AG. Chiral N-heterocyclic carbene-iridium complexes for asymmetric reduction of prochiral ketimines. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Ejaz S, Zubair M, Rizwan K, Karakaya I, Rasheed T, Rasool N. An Updated Coverage on the Synthesis of Benzo[b]thiophenes via Transition-metalcatalyzed Reactions: A Review. CURR ORG CHEM 2021. [DOI: 10.2174/1385272824999201111204317] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The benzo[b]thiophene nucleus is ubiquitous in biologically and pharmaceutically
important compounds. These moieties are highly important in materials science. The synthesis
of benzothiophene as a privileged structure has readily become a subject of great interest
and actively pursued in recent years. This review focuses on facile and convenient methods of
synthesis of benzo[b]thiophene based molecules through different transition metals catalyzed
reactions.
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Affiliation(s)
- Saba Ejaz
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Zubair
- Department of Chemistry, Government College University, Faisalabad 38000,, Pakistan
| | - Komal Rizwan
- Department of Chemistry, Government College University, Faisalabad 38000,, Pakistan
| | - Idris Karakaya
- Department of Chemistry, College of Basic Sciences, Gebze Technical University, 41400 Gebze, Turkey
| | - Tahir Rasheed
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Nasir Rasool
- Department of Chemistry, Government College University, Faisalabad 38000,, Pakistan
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13
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Asymmetric hydrogenation of unfunctionalized olefins or with poorly coordinative groups. ADVANCES IN CATALYSIS 2021. [DOI: 10.1016/bs.acat.2021.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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Rana S, Biswas JP, Paul S, Paik A, Maiti D. Organic synthesis with the most abundant transition metal–iron: from rust to multitasking catalysts. Chem Soc Rev 2021; 50:243-472. [DOI: 10.1039/d0cs00688b] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The promising aspects of iron in synthetic chemistry are being explored for three-four decades as a green and eco-friendly alternative to late transition metals. This present review unveils these rich iron-chemistry towards different transformations.
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Affiliation(s)
- Sujoy Rana
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | | | - Sabarni Paul
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | - Aniruddha Paik
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | - Debabrata Maiti
- Department of Chemistry
- IIT Bombay
- Mumbai-400076
- India
- Tokyo Tech World Research Hub Initiative (WRHI)
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15
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Mohammadkhani L, Heravi MM. Applications of Transition-Metal-Catalyzed Asymmetric Allylic Substitution in Total Synthesis of Natural Products: An Update. CHEM REC 2020; 21:29-68. [PMID: 33206466 DOI: 10.1002/tcr.202000086] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 01/14/2023]
Abstract
Metal-catalyzed asymmetric allylic substitution (AAS) reaction is one of the most synthetically useful reactions catalyzed by metal complexes for the formation of carbon-carbon and carbon-heteroatom bonds. It comprises the substitution of allylic substrates with a wide range of nucleophiles or SN 2'-type allylic substitution, which results in the formation of the above-mentioned bonds with high levels of enantioselective induction. AAS reaction tolerates a broad range of functional groups, thus has been successfully applied in the asymmetric synthesis of a wide range of optically pure compounds. This reaction has been extensively used in the total synthesis of several complex molecules, especially natural products. In this review, we try to highlight the applications of metal (Pd, Ir, Mo, or Cu)-catalyzed AAS reaction in the total synthesis of the biologically active natural products, as a key step, updating the subject from 2003 till date.
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Affiliation(s)
- Leyla Mohammadkhani
- Department of Chemistry, School of Sciences, Alzahra University Vanak, Tehran, Iran
| | - Majid M Heravi
- Department of Chemistry, School of Sciences, Alzahra University Vanak, Tehran, Iran
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16
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Song L, Van der Eycken EV. Transition Metal-Catalyzed Intermolecular Cascade C-H Activation/Annulation Processes for the Synthesis of Polycycles. Chemistry 2020; 27:121-144. [PMID: 32530508 DOI: 10.1002/chem.202002110] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Indexed: 12/16/2022]
Abstract
Polycycles are abundantly present in numerous advanced chemicals, functional materials, bioactive molecules and natural products. However, the strategies for the synthesis of polycycles are limited to classical reactions and transition metal-catalyzed cross-coupling reactions, requiring pre-functionalized starting materials and lengthy synthetic operations. The emergence of novel approaches shows great promise for the fields of organic/medicinal/materials chemistry. Among them, transition metal-catalyzed C-H activation followed by intermolecular annulation reactions prevail, due to their straightforward manner with high atom- and step-economy, providing rapid, concise and efficient methods for the construction of diverse polycycles. Several strategies have been developed for the synthesis of polycycles, relying on sequential multiple C-H activation/annulation, or combination of C-H activation/annulation and further interaction with a proximal group, or merger of C-H activation with a cycloaddition reaction, or in situ formation of the directing group. These are attractive, efficient, step- and atom-economic methods starting from commercially available materials. This Minireview will provide an introduction to transition metal-catalyzed C-H activation for the synthesis of polycycles, helping researchers to discover indirect connections and reveal hidden opportunities. It will also promote the discovery of novel synthetic strategies relying on C-H activation.
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya street, Moscow, 117198, Russia
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17
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Kopp J, Brückner R. Stereoselective Total Synthesis of the Dimeric Naphthoquinonopyrano-γ-lactone (-)-Crisamicin A: Introducing the Dimerization Site by a Late-Stage Hartwig Borylation. Org Lett 2020; 22:3607-3612. [PMID: 32298125 DOI: 10.1021/acs.orglett.0c01078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first stereoselective total synthesis of the dimeric naphthoquinonopyrano-γ-lactone (-)-crisamicin A was realized (13 steps, 5% overall yield). 1,4,5-Trimethoxynaphthalene, reached in five known steps, was brominated at C-3 to install a but-3-enoic ester by an ensuing Heck coupling. An asymmetric Sharpless dihydroxylation followed and gave a β-hydroxy-γ-lactone with >99.9% ee. Its OH substituent and acetaldehyde established the dihydropyran ring in a completely diastereoselective oxa-Pictet-Spengler cyclization. The 2,3-fused anisole moiety allowed the C5-H bond under Hartwig's conditions to be borylated. This set the stage for engaging the resulting C5-B bond in an oxidative dimerization, which led to a binaphthohydroquinon-5-yl. The latter was advanced to synthetic crisamicin A by a double CAN oxidation (→ a binaphthoquinon-5-yl) and a double demethylation.
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Affiliation(s)
- Julia Kopp
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany
| | - Reinhard Brückner
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany
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18
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Affiliation(s)
- Quan Zheng
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chen‐Fu Liu
- College of Pharmaceutical ScienceGannan Medical University Ganzhou 341000 People's Republic of China
| | - Jie Chen
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Guo‐Wu Rao
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of Technology Hangzhou 310014 People's Republic of China
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19
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Li X, Ouyang W, Nie J, Ji S, Chen Q, Huo Y. Recent Development on Cp*Ir(III)‐Catalyzed C−H Bond Functionalization. ChemCatChem 2020. [DOI: 10.1002/cctc.201902150] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xianwei Li
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Wensen Ouyang
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Jianhong Nie
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Shaomin Ji
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Qian Chen
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
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20
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Iridium-Catalyzed Undirected Homogeneous C–H Borylation Reaction. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Shishido R, Sasaki I, Seki T, Ishiyama T, Ito H. Direct Dimesitylborylation of Benzofuran Derivatives by an Iridium-Catalyzed C-H Activation with Silyldimesitylborane. Chemistry 2019; 25:12924-12928. [PMID: 31432548 DOI: 10.1002/chem.201903776] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Indexed: 12/23/2022]
Abstract
Direct dimesitylborylation of benzofuran derivatives by a C-H activation catalyzed by an iridium(I)/N-heterocyclic carbene (NHC) complex in the presence of Ph2 MeSi-BMes2 afforded the corresponding dimesitylborylation products in good to high yield with excellent regioselectivity. This method provides a straightforward route to donor-(π-spacer)-acceptor systems with intriguing solvatochromic luminescence properties.
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Affiliation(s)
- Ryosuke Shishido
- Division of Applied Chemistry, Graduate School of Engineering Hokkaido University, Kita 13 Nishi 8 Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
| | - Ikuo Sasaki
- Department of Chemistry and Bioscience, Faculty of Science and Technology, Aoyama Gakuin University, 5-10-1, Fuchinobe, Chuo-ku, Sagamihara, 252-5258, Japan
| | - Tomohiro Seki
- Division of Applied Chemistry, Graduate School of Engineering Hokkaido University, Kita 13 Nishi 8 Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICRD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, 001-0021, Japan
| | - Tatsuo Ishiyama
- Division of Applied Chemistry, Graduate School of Engineering Hokkaido University, Kita 13 Nishi 8 Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
| | - Hajime Ito
- Division of Applied Chemistry, Graduate School of Engineering Hokkaido University, Kita 13 Nishi 8 Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICRD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, 001-0021, Japan
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22
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Xun MM, Bai Y, Wang Y, Hu Z, Fu K, Ma W, Yuan C. Synthesis of Four Illudalane Sesquiterpenes Utilizing a One-Pot Diels-Alder/Oxidative Aromatization Sequence. Org Lett 2019; 21:6879-6883. [PMID: 31441309 DOI: 10.1021/acs.orglett.9b02511] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The concise, divergent total syntheses of four illudalane sesquiterpenes using an indanone as the key intermediate are reported. The key elements in these total syntheses, which involve only four to six operational steps, consist of a Suzuki cross-coupling and a one-pot Diels-Alder/oxidative aromatization reaction.
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Affiliation(s)
- Miao-Miao Xun
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
| | - Yunli Bai
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
| | - Yanhong Wang
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
| | - Zhiyong Hu
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
| | - Kai Fu
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
| | - Wenbing Ma
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
| | - Changchun Yuan
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan 030000, P.R. China
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23
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Ratsch F, Schlundt W, Albat D, Zimmer A, Neudörfl JM, Netscher T, Schmalz HG. Total Synthesis of α-Tocopherol through Enantioselective Iridium-Catalyzed Fragmentation of a Spiro-Cyclobutanol Intermediate. Chemistry 2019; 25:4941-4945. [PMID: 30741456 DOI: 10.1002/chem.201900564] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Indexed: 11/10/2022]
Abstract
A conceptionally new strategy for the asymmetric (2R-selective) synthesis of α-tocopherol (vitamin E) was developed. In the stereocontrolled key step, a prochiral spiro[chromane-2,3'-cyclobutanol] unit is effectively desymmetrized under C-C bond activation in an unprecedented iridium-catalyzed transformation using (S)-DTBM-SegPhos as a chiral ligand (e.r. 97:3). To complete the synthesis, the side chain was attached through Ru-catalyzed cross-metathesis employing an alkene derived from (R,R)-hexahydrofarnesol. To suppress epimerization during the final hydrogenation, PtO2 had to be used as a catalyst instead of Pd/C. In an alternative approach (employing a propargyl-substituted spiro-cyclobutanol), the side chain was constructed prior to the Ir-catalyzed ring fragmentation (>99:1 d.r.) through enyne cross-metathesis (using an alkene derived from (R)-dihydrocitronellal) followed by Cr-catalyzed 1,4-hydrogenation and (diastereoselective) Pfaltz hydrogenation of the resulting triple-substituted olefin. The work demonstrates the potential of iridium catalysis for enantioselective C-C bond activation.
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Affiliation(s)
- Friederike Ratsch
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939, Koeln, Germany
| | - Waldemar Schlundt
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939, Koeln, Germany
| | - Dominik Albat
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939, Koeln, Germany
| | - Anne Zimmer
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939, Koeln, Germany
| | - Jörg-Martin Neudörfl
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939, Koeln, Germany
| | - Thomas Netscher
- Research and Development, DSM Nutritional Products, P.O. Box 2676, CH-4002, Basel, Switzerland
| | - Hans-Günther Schmalz
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939, Koeln, Germany
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24
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Cheng Q, Tu HF, Zheng C, Qu JP, Helmchen G, You SL. Iridium-Catalyzed Asymmetric Allylic Substitution Reactions. Chem Rev 2018; 119:1855-1969. [PMID: 30582688 DOI: 10.1021/acs.chemrev.8b00506] [Citation(s) in RCA: 442] [Impact Index Per Article: 73.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this review, we summarize the origin and advancements of iridium-catalyzed asymmetric allylic substitution reactions during the past two decades. Since the first report in 1997, Ir-catalyzed asymmetric allylic substitution reactions have attracted intense attention due to their exceptionally high regio- and enantioselectivities. Ir-catalyzed asymmetric allylic substitution reactions have been significantly developed in recent years in many respects, including ligand development, mechanistic understanding, substrate scope, and application in the synthesis of complex functional molecules. In this review, an explicit outline of ligands, mechanism, scope of nucleophiles, and applications is presented.
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Affiliation(s)
- Qiang Cheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Hang-Fei Tu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Jian-Ping Qu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials , Nanjing Tech University , Nanjing 211816 , China
| | - Günter Helmchen
- Organisch-Chemisches Institut der Ruprecht-Karls , Universität Heidelberg , Im Neuenheimer Feld 270 , D-69120 Heidelberg , Germany
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
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25
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1402] [Impact Index Per Article: 233.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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26
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Wang Z, Zhu L, Zhong K, Qu L, Bai R, Lan Y. Mechanistic Insights into Manganese (I)‐Catalyzed Chemoselective Hydroarylations of Alkynes: A Theoretical Study. ChemCatChem 2018. [DOI: 10.1002/cctc.201801301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zheyuan Wang
- School of Chemistry and Chemical Engineering Chongqing University Chongqing 400030 P.R. China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering Chongqing University Chongqing 400030 P.R. China
| | - Kangbao Zhong
- School of Chemistry and Chemical Engineering Chongqing University Chongqing 400030 P.R. China
| | - Ling‐Bo Qu
- College of Chemistry and Molecular Engineering Zhengzhou University Zhengzhou 450001 P.R. China
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering Chongqing University Chongqing 400030 P.R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering Chongqing University Chongqing 400030 P.R. China
- College of Chemistry and Molecular Engineering Zhengzhou University Zhengzhou 450001 P.R. China
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27
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Brandão P, Burke AJ. Recent advances in the asymmetric catalytic synthesis of chiral 3-hydroxy and 3-aminooxindoles and derivatives: Medicinally relevant compounds. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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28
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Han Z, Chaowei D, Lice L, Hongfei M, Hongzhong B, Yufeng L. Nickel (II)-Catalyzed efficient aminocarbonylation of unreactive alkanes with formanilides—Exploiting the deformylation behavior of imides. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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29
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Chen W, Liu FX, Gong W, Zhou Z, Gao H, Shi J, Wu B, Yi W. Hydroxyl Group-Prompted and Iridium(III)-Catalyzed Regioselective C−H Annulation of N
-phenoxyacetamides with Propargyl Alcohols. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800322] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Weijie Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & Fifth Affiliated Hospital; Guangzhou Medical University; Guangzhou, Guangdong 511436 China
| | - Fu-Xiaomin Liu
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & Fifth Affiliated Hospital; Guangzhou Medical University; Guangzhou, Guangdong 511436 China
| | - Wanchun Gong
- Central Research Institute of Shanghai Pharmaceuticals Holding Co., Ltd.; Shanghai 201203 China
| | - Zhi Zhou
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & Fifth Affiliated Hospital; Guangzhou Medical University; Guangzhou, Guangdong 511436 China
| | - Hui Gao
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & Fifth Affiliated Hospital; Guangzhou Medical University; Guangzhou, Guangdong 511436 China
| | - Jingjing Shi
- VARI/SIMM Center, Center for Structure and Function of Drug Targets, CAS-Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 China
| | - Bo Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & Fifth Affiliated Hospital; Guangzhou Medical University; Guangzhou, Guangdong 511436 China
| | - Wei Yi
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & Fifth Affiliated Hospital; Guangzhou Medical University; Guangzhou, Guangdong 511436 China
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30
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Miley GP, Rote JC, Silverman RB, Kelleher NL, Thomson RJ. Total Synthesis of Tambromycin Enabled by Indole C-H Functionalization. Org Lett 2018; 20:2369-2373. [PMID: 29584440 DOI: 10.1021/acs.orglett.8b00700] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The total synthesis of tambromycin (1), a recently isolated tetrapeptide, is reported. This unusual natural product possesses a highly modified tryptophan-derived indole fragment fused to an α-methylserine-derived oxazoline ring, and a unique noncanonical amino acid residue named tambroline (11). A convergent synthesis of tambromycin was achieved by a 13-step route that leveraged recent developments in the field of C-H functionalization to prepare the complex indole fragment, as well as an efficient synthesis of tambroline that featured a diastereoselective amination of homoproline.
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