1
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Zhou Y, Jiang Q, Cheng Y, Hu M, Duan XH, Liu L. Photoredox-Catalyzed Acylchlorination of α-CF 3 Alkenes with Acyl Chloride and Application as Masked Access to β-CF 3-enones. Org Lett 2024; 26:2656-2661. [PMID: 38526445 DOI: 10.1021/acs.orglett.4c00830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
We disclose a photocatalytic strategy that simultaneously addresses the construction of trifluoromethylated quaternary carbon centers and the preparation of β-CF3-enones through radical difunctionalization of α-CF3 alkenes with acyl chlorides. This method is characterized by its broad functional group compatibility, high efficiency, and atom economy. The versatility of this transformation is poised to broaden the applications of α-CF3 alkenes, providing new pathways for the rapid assembly of structurally diverse fluorinated compounds.
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Affiliation(s)
- Youkang Zhou
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Qi Jiang
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yangyang Cheng
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an 710061, China
| | - Mingyou Hu
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xin-Hua Duan
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Le Liu
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
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2
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Prajapati N, Sharma D, Ashok Bidve P, Chouhan D, Allani M, Kumar Patel S, Ghosh Chowdhury M, Shard A, Tiwari V. Glucose regulation by newly synthesized boronic acid functionalized molecules as dipeptidyl peptidase IV inhibitor: a potential compound for therapeutic intervention in hyperglycaemia. J Biomol Struct Dyn 2024; 42:2859-2871. [PMID: 37254302 DOI: 10.1080/07391102.2023.2215319] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 04/19/2023] [Indexed: 06/01/2023]
Abstract
Management of type 2 diabetes mellitus (T2DM) using dipeptidyl peptidase IV (DPP IV) inhibitors is gaining precedence as this enzyme plays an indispensable role in cleaving and inactivating peptides, such as glucagon-like peptide-1 (GLP-1), incretin hormones, and glucose-dependent insulinotropic polypeptide (GIP). There are several DPP IV inhibitors used to treat T2DM, but limited by side effects such as disturbed GIT, flu-like symptoms, etc. Thus, there is an urgent need for the development of novel and better DPP IV inhibitors for the management of the same. In the present study, we investigated the effect of new boronic acid-based thiazole compounds as DPP IV inhibitors. We used substituted anilines that were progressively modified through a multi-step synthesis and then chemically characterised. These molecules have good binding affinity and molecular interactions at the active site of the DPP IV enzyme. Two boronic acid-based molecules, i.e. PC06R58 and PC06R108, were used for the assessment of their in-vitro enzymatic activities. Both molecules (PC06108 and PC06R58) exhibited potent uncompetitive DPP IV enzyme inhibition at two different concentrations of 90.9 and 15.6 nM, respectively, compared to sitagliptin having an IC50 of 17.3 nM. Furthermore, the oral glucose tolerance test suggested significantly reduced blood glucose levels at 20 mg/kg of the body weight upon administration of PC06R58 and PC06R108 molecules in rats after glucose ingestion (2 g/kg of the body weight). The compounds showed satisfactory DPP IV inhibition. Furthermore, DPP IV inhibitory activity and acceptable pre-ADME/Tox profile indicate it is a lead compound in this novel class of DPP IV inhibitors.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Namrata Prajapati
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
| | - Dilip Sharma
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
- Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Pankaj Ashok Bidve
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
| | - Deepak Chouhan
- Neuroscience and Pain Research Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India
| | - Meghana Allani
- Neuroscience and Pain Research Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India
| | - Sagar Kumar Patel
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
| | - Moumita Ghosh Chowdhury
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
| | - Amit Shard
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
| | - Vinod Tiwari
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Gandhinagar, Gujarat, India
- Neuroscience and Pain Research Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India
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3
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Cong X, Zhuo Q, Hao N, Mishra A, Nishiura M, Hou Z. Divergent Synthesis of Multi-Substituted Aminotetralins via [4+2] Annulation of Aldimines with Alkenes by Rare-Earth-Catalyzed Benzylic C(sp 3 )-H Activation. Angew Chem Int Ed Engl 2024; 63:e202318203. [PMID: 38226440 DOI: 10.1002/anie.202318203] [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: 11/28/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/17/2024]
Abstract
The search for efficient and selective methods for the divergent synthesis of multi-substituted aminotetralins is of much interest and importance. We report herein for the first time the diastereoselective [4+2] annulation of 2-methyl aromatic aldimines with alkenes via benzylic C(sp3 )-H activation by half-sandwich rare-earth catalysts, which constitutes an efficient route for the divergent synthesis of both trans and cis diastereoisomers of multi-substituted 1-aminotetralin derivatives from readily accessible aldimines and alkenes. The use of a scandium catalyst bearing a sterically demanding cyclopentadienyl ligand such as C5 Me4 SiMe3 or C5 Me5 exclusively afforded the trans-selective annulation products in the reaction of aldimines with styrenes and aliphatic alkenes. In contrast, the analogous yttrium catalyst, whose metal ion size is larger than that of scandium, yielded the cis-selective annulation products. This protocol features 100 % atom-efficiency, excellent diastereoselectivity, broad substrate scope, and good functional group compatibility. The reaction mechanisms have been elucidated by kinetic isotope effect (KIE) experiments and the isolation and transformations of some key reaction intermediates.
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Affiliation(s)
- Xuefeng Cong
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Qingde Zhuo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Na Hao
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Aniket Mishra
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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4
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Sindhe H, Kamble A, Reddy MM, Singh A, Sharma S. Iridium(III)-catalyzed β-trifluoromethyl enone carbonyl-directed regioselective ortho-C(sp 2)-H olefination. Org Biomol Chem 2024; 22:1162-1166. [PMID: 38226536 DOI: 10.1039/d3ob02024j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
Due to the lower LUMO energy level at the β-position of α,β-unsaturated-β-trifluoromethyl enone than that of its non-fluorinated counterpart, there is a challenge to activate the sp2 C-H bond of aromatic rings. Herein, we have reported iridium(III)-catalyzed β-trifluoromethyl enone carbonyl-directed regioselective aromatic C(sp2)-H olefination with acrylates under oxidative conditions. Furthermore, coupling with natural product-derived acrylates, scale-up and product diversification have also been performed.
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Affiliation(s)
- Haritha Sindhe
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat - 382355, India
| | - Akshay Kamble
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat - 382355, India
| | - Malladi Mounika Reddy
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat - 382355, India.
| | - Amardeep Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat - 382355, India.
| | - Satyasheel Sharma
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat - 382355, India.
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5
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Yao T, Zhu R, Liu T. Synthesis of 3-aminoindenes and cis-1-aminoindanes by Zn(OTf) 2-catalyzed cyclization of o-alkynylbenzaldehydes with tertiary alkyl primary amines. Chem Commun (Camb) 2023; 59:14325-14328. [PMID: 37971424 DOI: 10.1039/d3cc04180h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Using Zn(OTf)2 as catalyst, a highly regio- and chemo-selective cyclocarboamination of o-alkynylbenzaldehydes with tertiary alkyl primary amines was realized to access 3-aminoindenes with different substitution patterns from previously reported methods. The full reduction of the iminoindenone intermediates affords cis-1-amino-2-arylindanes with excellent diastereoselectivity. Mechanistically, the reaction involves the rearrangement of 1-amino-3-arylidene-isoindolines and isomerization of 1-aminoindenes to 3-aminoindenes.
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Affiliation(s)
- Tuanli Yao
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.
| | - Rui Zhu
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.
| | - Tao Liu
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.
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6
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Kang N, Zhao ZX, Zhang HX. Mechanistic Study on CpRh(III)-Catalyzed [3 + 2] Annulation of Aniline Derivatives with Vinylsilanes: A DFT Study. J Org Chem 2023. [PMID: 37167409 DOI: 10.1021/acs.joc.3c00539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The rhodium(III)-catalyzed reaction of aniline derivatives that contain a pyrimidine-directing group with vinylsilanes results in the formation of C3-substituted indoline derivatives. The reaction path and formation of the indoline product with density functional theory calculations were analyzed. This study reveals that the whole catalysis can be characterized in the following stages: (I) C-H activation via concerted metalation deprotonation, (II) 2,1-vinylsilane insertion, (III) deprotonation of the NH amide proton, (IV) the oxidation of Ag+, and (V) reductive elimination. These steps are kinetically and thermodynamically feasible for experimental realization under mild conditions, and the insertion step with a barrier of 22.0 kcal/mol should not only be the critical step of regioselectivity but also the rate-determining step during the whole catalysis. Computations reveal that the Ag+ oxidation can accelerate the reductive elimination step after the formation of natural intermediate, thus highlighting the role of Ag+ as a catalytic promoter for the oxidatively induced reactivity of the Rh catalyst in C3-substituted indoline synthesis.
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Affiliation(s)
- Na Kang
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Zeng-Xia Zhao
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Hong-Xing Zhang
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
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7
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Sindhe H, Saiyed N, Kamble A, Mounika Reddy M, Singh A, Sharma S. Catalytic and Chemodivergent Synthesis of 1-Substituted 9 H-Pyrrolo[1,2- a]indoles via Annulation of β-CF 3 Enones with 3-Substituted Indoles. J Org Chem 2023; 88:230-244. [PMID: 36503232 DOI: 10.1021/acs.joc.2c02240] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chemodivergent reactions are more advantageous in organic synthesis that yield diversely functionalized scaffolds from common starting materials. Herein, we report an efficient metal-free chemodivergent protocol for the synthesis of 1-substituted 9H-pyrrolo[1,2-a]indole derivatives in the presence of catalytic amounts of Lewis acid/Brønsted acid conditions using 3-substituted indoles and β-trifluoromethyl-α,β-unsaturated ketones. Fine-tuning of the catalyst and solvent system in the reaction conditions deliver the trifluoromethyl, trifluoroethylcarboxylate, or carboxylic acid substituents on the C1-position of 9H-pyrrolo[1,2-a]indole derivatives in situ. It is postulated that the solvent and LA/BA catalyst interaction was found to be crucial for the catalytic C-F activation in these transformations.
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Affiliation(s)
- Haritha Sindhe
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Ahmedabad, Gandhinagar, Gujarat 382355, India
| | - Nehanaz Saiyed
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Ahmedabad, Gandhinagar, Gujarat 382355, India
| | - Akshay Kamble
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Ahmedabad, Gandhinagar, Gujarat 382355, India
| | - Malladi Mounika Reddy
- Department of Natural Products, National Institute of Pharmaceutical Education and Research-Ahmedabad, Gandhinagar, Gujarat 382355, India
| | - Amardeep Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research-Ahmedabad, Gandhinagar, Gujarat 382355, India
| | - Satyasheel Sharma
- Department of Natural Products, National Institute of Pharmaceutical Education and Research-Ahmedabad, Gandhinagar, Gujarat 382355, India
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8
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Theoretical Investigation of the Mechanism of Rh(III)-catalyzed Annulation of 2-Biphenylboronic Acid with Activated Alkene. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2187-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Cong X, Zhuo Q, Hao N, Mo Z, Zhan G, Nishiura M, Hou Z. Regio‐ and Diastereoselective [3+2] Annulation of Aliphatic Aldimines with Alkenes by Scandium‐Catalyzed β‐C(sp
3
)−H Activation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xuefeng Cong
- Advanced Catalysis Research Group RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako, Saitama 351-0198 Japan
| | - Qingde Zhuo
- Organometallic Chemistry Laboratory RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako, Saitama 351-0198 Japan
| | - Na Hao
- Advanced Catalysis Research Group RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako, Saitama 351-0198 Japan
| | - Zhenbo Mo
- Organometallic Chemistry Laboratory RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako, Saitama 351-0198 Japan
| | - Gu Zhan
- Organometallic Chemistry Laboratory RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako, Saitama 351-0198 Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako, Saitama 351-0198 Japan
- Organometallic Chemistry Laboratory RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako, Saitama 351-0198 Japan
| | - Zhaomin Hou
- Advanced Catalysis Research Group RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako, Saitama 351-0198 Japan
- Organometallic Chemistry Laboratory RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako, Saitama 351-0198 Japan
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10
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Sindhe H, Chaudhary B, Chowdhury N, Kamble A, Kumar V, Lad A, Sharma S. Recent advances in transition-metal catalyzed directed C–H functionalization with fluorinated building blocks. Org Chem Front 2022. [DOI: 10.1039/d1qo01544c] [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
This review focuses on the advances in transition-metal catalyzed reactions with fluorinated building blocks via directed C–H bond activation for the construction of diverse organic molecules with an insight into the probable mechanistic pathway.
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Affiliation(s)
- Haritha Sindhe
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
| | - Bharatkumar Chaudhary
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
| | - Neelanjan Chowdhury
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
| | - Akshay Kamble
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
| | - Vivek Kumar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
| | - Aishwarya Lad
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
| | - Satyasheel Sharma
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Gandhinagar, Gujarat-382355, India
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11
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Cong X, Zhuo Q, Hao N, Mo Z, Zhan G, Nishiura M, Hou Z. Regio- and Diastereoselective [3+2] Annulation of Aliphatic Aldimines with Alkenes by Scandium-Catalyzed β-C(sp 3 )-H Activation. Angew Chem Int Ed Engl 2021; 61:e202115996. [PMID: 34913239 DOI: 10.1002/anie.202115996] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Indexed: 12/13/2022]
Abstract
Here we report for the first time the regio- and diastereoselective [3+2] annulation of a wide range of aliphatic aldimines with alkenes via the activation of an unactivated β-C(sp3 )-H bond by half-sandwich scandium catalysts. This protocol offers a straightforward and atom-efficient route for the synthesis of a new family of multi-substituted aminocyclopentane derivatives from easily accessible aliphatic aldimines and alkenes. The annulation of aldimines with styrenes exclusively afforded the 5-aryl-trans-substituted 1-aminocyclopentane derivatives with excellent diastereoselectivity through the 2,1-insertion of a styrene unit. The annulation of aldimines with aliphatic alkenes selectively gave the 4-alkyl-trans-substituted 1-aminocyclopentane products in a 1,2-insertion fashion. A catalytic amount of an appropriate amine such as adamantylamine (AdNH2 ) or dibenzylamine (Bn2 NH) showed significant effects on the catalyst activity and stereoselectivity.
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Affiliation(s)
- Xuefeng Cong
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Qingde Zhuo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Na Hao
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Zhenbo Mo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Gu Zhan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
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12
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Abstract
This review describes methods for the synthesis of 1-trifluomethylindanes and close structures, which are still quite rare and scarcely available compounds. There are two main approaches to obtain 1-CF3-indanes. The first one is the construction of an indane system from CF3 precursors; the main methods are acid-mediated Friedel–Crafts cyclization, transition metal-catalyzed [3+2] annulation, and free-radical transformations. The second approach is the trifluoromethylation of a ready-made indane core by various CF3 sources, such as Ruppert–Prakash or Togni reagents. Many of these synthetic procedures possess high regio- and stereo-selectivity, allowing the preparation of unique 1-CF3-indane structures. In recent years, great attention has been paid to the synthesis of 1-CF3-indanes, due to the discovery of important biologically active properties for these compounds.
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13
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Liu B, Yang L, Dong Z, Chang J, Li X. Rh(III)-Catalyzed Annulation of 2-Biphenylboronic Acid with Diverse Activated Alkenes. Org Lett 2021; 23:7199-7204. [PMID: 34468147 DOI: 10.1021/acs.orglett.1c02597] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Rhodium(III)-catalyzed annulation of 2-biphenylboronic acids with three classes of activated alkenes has been realized, leading to the synthesis of fused or bridged cyclic skeletons via transmetalation-initiated C-H activation. In the annulative coupling of 2-biphenylboronic acid with a CF3-substituted enone, the bulky cyclopentadienyl ligand (CptBu) in the catalyst proved effective to promote the reductive elimination process prior to protonolysis, affording the [4 + 2] annulated products instead of the simple 1,4-addition product. Seven-membered rings were obtained when disubstituted cyclopropenones were employed. Bridged cycles were isolated from the coupling of 2-biphenylboronic acid with benzoquinones as a result of 2-fold Michael additions. The substrate scopes were found to be broad with up to 99% yield under air-tolerant conditions.
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Affiliation(s)
- Bingxian Liu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Lingyun Yang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Zhenzhen Dong
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Junbiao Chang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Xingwei Li
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China.,School of Chemistry and Chemical Engineering, Shaanxi Normal University (SNNU), Xi'an 710062, People's Republic of China
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14
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Zhao F, Qiao J, Lu Y, Zhang X, Dai L, Liu S, Ni H, Jia X, Wu X, Lu S. Redox-Neutral Rhodium(III)-Catalyzed Chemospecific and Regiospecific [4+1] Annulation between Indoles and Alkenes for the Synthesis of Functionalized Imidazo[1,5- a]indoles. J Org Chem 2021; 86:10591-10607. [PMID: 34297561 DOI: 10.1021/acs.joc.1c01256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Exploiting internal alkenes embedded with an oxidizing function/leaving group as a rare and unconventional one-carbon unit, a redox-neutral rhodium(III)-catalyzed chemo- and regiospecific [4+1] annulation between indoles and alkenes for the synthesis of functionalized imidazo[1,5-a]indoles has been achieved. Internal alkenes employed here can fulfill an unusual [4+1] annulation rather than normal [4+2] annulation/C-H alkenylation. This method is characterized by excellent chemo- and regioselectivity, broad substrate scope, good functional group tolerance, good to high yields, and redox-neutral conditions.
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Affiliation(s)
- Fei Zhao
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, P. R. China.,Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Jin Qiao
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Yangbin Lu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Xiaoning Zhang
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Long Dai
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Siyu Liu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Hangcheng Ni
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Xiuwen Jia
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, P. R. China
| | - Xiaowei Wu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China.,Zhongshan Institute for Drug Discovery, the Institutes of Drug Discovery and Development, Chinese Academy of Sciences, Zhongshan 528400, P. R. China
| | - Shiyao Lu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, P. R. China.,Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
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15
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Wang J, Ba D, Yang M, Cheng G, Wang L. Regioselective Synthesis of 2,4-Diaryl-6-trifluoromethylated Pyridines through Copper-Catalyzed Cyclization of CF 3-Ynones and Vinyl Azides. J Org Chem 2021; 86:6423-6432. [PMID: 33905254 DOI: 10.1021/acs.joc.1c00275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel copper-catalyzed cyclization of readily available vinyl azides with CF3-ynones is steadily achieved under mild conditions to furnish the versatile 2,4-diaryl-6-trifluoromethylated pyridine products, which are of great interest in medicinal chemistry. The generation of the vinyl iminophosphorane intermediates from vinyl azides through the Staudinger-Meyer reaction ensures the subsequent 1,4-addition process with CF3-ynones in this transformation.
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Affiliation(s)
- Jixin Wang
- School of Medicine, Huaqiao University, Quanzhou 362021, P.R. China
| | - Da Ba
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P.R. China
| | - Mengqi Yang
- School of Medicine, Huaqiao University, Quanzhou 362021, P.R. China
| | - Guolin Cheng
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P.R. China
| | - Lianhui Wang
- School of Medicine, Huaqiao University, Quanzhou 362021, P.R. China
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16
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Wang P, Luo G, Yang J, Cong X, Hou Z, Luo Y. Theoretical Studies of Rare-Earth-Catalyzed [3 + 2] Annulation of Aromatic Aldimine with Styrene: Mechanism and Origin of Diastereoselectivity. J Org Chem 2021; 86:4236-4244. [PMID: 33617714 DOI: 10.1021/acs.joc.0c03060] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The synthesis of multisubstituted 1-aminoindanes through catalyst-controlled diastereodivergent [3 + 2] annulation of aromatic imines with alkenes is of great interest and importance. An understanding of the exact reaction mechanism, especially for the origin of diastereoselectivity, is an essential aspect for further development of such reactions. In this study, density functional theory calculations have been carried out on the rare-earth-catalyzed diastereodivergent [3 + 2] annulation of benzaldimine with styrene. The results show that the reaction mainly involves generation of active species, olefin insertion, cyclization, and protonation steps. The noncovalent interactions, such as C-H···π and metal···π interactions, play an important role in stabilizing the key transition state or intermediate. Both steric and electronic factors account for the diastereoselectivity. The preferred cis-diastereoselectivity could be ascribed to more efficient orbital interaction, while the crowded space will induce the formation of a C-H···π interaction between the NtBu group and benzene ring in a trans-diastereoselectivity manner, thus stabilizing the trans-selective transition state. Therefore, the stereospecific product could be obtained by fine-tuning the ligand/metal combination of the catalysts.
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Affiliation(s)
- Pan Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Gen Luo
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Jimin Yang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xuefeng Cong
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science and Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 3510198, Japan
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.,Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science and Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 3510198, Japan
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.,PetroChina Petrochemical Research Institute, Beijing 102206, China
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17
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Hu T, Xu Y, Zhang S, Xiong HY, Zhang G. Synthesis of β-CF3 β-Amino Esters with an Indane Backbone by Rhenium-Catalyzed [3+2] Annulation. Org Lett 2020; 22:8866-8871. [DOI: 10.1021/acs.orglett.0c03239] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tingjun Hu
- Institute of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Yuanqing Xu
- Institute of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Saisai Zhang
- Institute of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Heng-Ying Xiong
- Institute of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Guangwu Zhang
- Institute of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
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18
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Chaudhary B, Kulkarni N, Saiyed N, Chaurasia M, Desai S, Potkule S, Sharma S. β
‐Trifluoromethyl
α
,
β
‐unsaturated Ketones: Efficient Building Blocks for Diverse Trifluoromethylated Molecules. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bharatkumar Chaudhary
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
| | - Neeraj Kulkarni
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
| | - Nehanaz Saiyed
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
| | - Meenakshi Chaurasia
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
| | - Surbhi Desai
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
| | - Sagar Potkule
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
| | - Satyasheel Sharma
- Department of Natural Products National Institute of Pharmaceutical Education and Research Ahmedabad (NIPER−A) Gandhinagar Gujarat 382355 INDIA
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19
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Zheng G, Duan X, Chen L, Sun J, Zhai S, Li X, Jing J, Li X. Access to [4,3,1]-Bridged Carbocycles via Rhodium(III)-Catalyzed C-H Activation of 2-Arylindoles and Annulation with Quinone Monoacetals. J Org Chem 2020; 85:4543-4552. [PMID: 32068406 DOI: 10.1021/acs.joc.0c00018] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reported herein is the Rh(III)-catalyzed annulation of N-unprotected 2-arylindoles with quinone monoacetals for the straightforward synthesis of [4,3,1]-bridged carbocycles with exclusive C(3) selectivity. Mechanistic studies, particularly deuterium-labeling experiments, suggest that the coupling likely proceeds via two-fold C-H activation with two-fold migratory insertion into the enone moieties.
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Affiliation(s)
- Guangfan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Xujing Duan
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Lu Chen
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Jiaqiong Sun
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Shuailei Zhai
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Xiaojiao Li
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Jierui Jing
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Xingwei Li
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering Shaanxi Normal University (SNNU), Xi'an 710062, China
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20
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Cong X, Zhan G, Mo Z, Nishiura M, Hou Z. Diastereodivergent [3 + 2] Annulation of Aromatic Aldimines with Alkenes via C-H Activation by Half-Sandwich Rare-Earth Catalysts. J Am Chem Soc 2020; 142:5531-5537. [PMID: 32148027 DOI: 10.1021/jacs.0c01171] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Stereodivergent catalysis is of great importance, as it can allow efficient access to all possible stereoisomers of a given product with multiple stereocenters from the same set of starting materials. We report herein the first diastereodivergent [3 + 2] annulation of aromatic aldimines with alkenes via C-H activation by half-sandwich rare-earth catalysts. This protocol provides an efficient and general route for the selective synthesis of both trans and cis diastereoisomers of multisubstituted 1-aminoindanes from the same set of aldimines and alkenes, featuring 100% atom efficiency, excellent diastereoselectivity, broad substrate scope, and good functional group compatibility. The diastereodivergence is achieved by fine-tuning the sterics or ligand/metal combination of the half-sandwich rare-earth metal complexes.
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Affiliation(s)
- Xuefeng Cong
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Gu Zhan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Zhenbo Mo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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21
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Chaudhary B, Kulkarni N, Sharma S. Rhodium(iii)-catalyzed synthesis of 3-trifluoromethylindanones from N-methoxybenzamides via C–H activation and Claisen/retro-Claisen reaction. Org Chem Front 2020. [DOI: 10.1039/d0qo00330a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An efficient synthesis of 3-trifluoromethylindanones via C–H annulation of N-methoxybenzamides with β-trifluoromethyl-α,β-unsaturated ketones under Rh(iii)-catalysis is described.
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Affiliation(s)
- Bharatkumar Chaudhary
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Ahmedabad (NIPER-A)
- Gandhinagar
- India
| | - Neeraj Kulkarni
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Ahmedabad (NIPER-A)
- Gandhinagar
- India
| | - Satyasheel Sharma
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Ahmedabad (NIPER-A)
- Gandhinagar
- India
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22
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Gao F, Meng FX, Du JY, Zhang S, Huang HL. One-Step Synthesis of Trifluoroethylated Chromones via Radical Cascade Cyclization-Coupling of 2-(Allyloxy)arylaldehydes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901636] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Fei Gao
- Institute of Molecular Medicine; Renji Hospital, School of Medicine; Shanghai Jiao Tong University; 200127 Shanghai China
| | - Fan-Xiao Meng
- College of Chemistry and Chemical Engineering; Liaocheng University; 252059 Liaocheng Shandong China
| | - Ji-Yuan Du
- College of Chemistry and Chemical Engineering; Liaocheng University; 252059 Liaocheng Shandong China
| | - Shiyan Zhang
- Institute of Molecular Medicine; Renji Hospital, School of Medicine; Shanghai Jiao Tong University; 200127 Shanghai China
| | - Hong-Li Huang
- College of Chemistry and Chemical Engineering; Liaocheng University; 252059 Liaocheng Shandong China
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23
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Liu Z, Zhang W, Guo S, Zhu J. Spiro[indene-1,4'-oxa-zolidinones] Synthesis via Rh(III)-Catalyzed Coupling of 4-Phenyl-1,3-oxazol-2(3 H)-ones with Alkynes: A Redox-Neutral Approach. J Org Chem 2019; 84:11945-11957. [PMID: 31436097 DOI: 10.1021/acs.joc.9b01804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transition-metal-catalyzed C-H activation synthesis of heterocyclic spiro[4,4]nonanes has persistently witnessed the use of additional stoichiometric transition-metal oxidant when employing C═C bond as the spiro ring closure site. Herein, we have addressed the issue by reporting a redox-neutral strategy for spiro[indene-1,4'-oxa-zolidinones] synthesis via Rh(III)-catalyzed coupling of 4-phenyl-1,3-oxazol-2(3H)-ones with alkynes. The synthesis features a broad substrate scope and high regiospecificity.
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Affiliation(s)
- Zhongsu Liu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
| | - Wenjing Zhang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
| | - Shan Guo
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
| | - Jin Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing 210023 , China
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24
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Tanaka R, Tanimoto I, Kojima M, Yoshino T, Matsunaga S. Imidate as the Intact Directing Group for the Cobalt-Catalyzed C–H Allylation. J Org Chem 2019; 84:13203-13210. [DOI: 10.1021/acs.joc.9b01972] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryo Tanaka
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Iku Tanimoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Masahiro Kojima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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