1
|
Hong C, Yu S, Liu Z, Xu Z, Zhang Y. Synthesis of Furans via Rhodium(III)-Catalyzed Cyclization of Acrylic Acids with α-Diazocarbonyl Compounds. J Org Chem 2022; 87:11979-11988. [PMID: 36037102 DOI: 10.1021/acs.joc.2c00924] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient protocol for the synthesis of furans through Rh(III)-catalyzed vinyl C-H activation from acrylic acids and α-diazocarbonyl compounds has been developed. The reaction features broad functional group tolerance and affords a series of furans in moderate to good yields. Moreover, no additives such as copper or silver salts are required. Some control experiments are performed to give insight into the mechanism of this cascade transformation and the decarbonylation process is involved in the formation of the furan product.
Collapse
Affiliation(s)
- Chao Hong
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Shuling Yu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zhanxiang Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zijing Xu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yuhong Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
2
|
Hong C, Yu S, Liu Z, Zhang Y. Rh-Catalyzed Coupling of Acrylic/Benzoic Acids with α-Diazocarbonyl Compounds: An Alternative Route for α-Pyrones and Isocoumarins. Org Lett 2022; 24:815-820. [PMID: 35019648 DOI: 10.1021/acs.orglett.1c03992] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A coupling of acrylic acids/benzoic acids with α-diazocarbonyl compounds has been realized by a combined catalytic system of rhodium catalyst and Zn(OAc)2 additive. The presence of Zn(OAc)2 obviously accelerates the C(sp2)-H activation and destructed the formation of carboxylic ester that is formed via a nucleophilic O-H insertion to metal carbenoid. The procedure featured mild reaction conditions and broad substrate scope, providing a straightforward approach to the synthesis of α-pyrones and isocoumarins without the transformation of carboxylic acids to the corresponding amides.
Collapse
Affiliation(s)
- Chao Hong
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Shuling Yu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zhanxiang Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yuhong Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
3
|
Li X, li D, zhang X. Ru(II)-Catalyzed C-H Bond Activation/Annulation of N-iminopyridinium Ylides with Sulfoxonium Ylides. Org Biomol Chem 2022; 20:1475-1479. [DOI: 10.1039/d1ob02427b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Ru(II)-catalyzed C-H bond activation/annulation of N-iminopyridinium ylides with sulfoxonium ylides has been developed for the synthesis of diverse functionalized isocoumarin derivatives. This method features broad substrate scope, high-functional-group tolerance,...
Collapse
|
4
|
Mancuso R, Ziccarelli I, Novello M, Cuocci C, Centore R, Della Ca' N, Olivieri D, Carfagna C, Gabriele B. A palladium iodide catalyzed regioselective carbonylative route to isocoumarin and thienopyranone carboxylic esters. J Catal 2022. [DOI: 10.1016/j.jcat.2021.11.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
5
|
Jha N, Khot NP, Kapur M. Transition-Metal-Catalyzed C-H Bond Functionalization of Arenes/Heteroarenes via Tandem C-H Activation and Subsequent Carbene Migratory Insertion Strategy. CHEM REC 2021; 21:4088-4122. [PMID: 34647679 DOI: 10.1002/tcr.202100193] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/20/2022]
Abstract
The past decade has witnessed tremendous developments in transition-metal-catalyzed C-H bond activation and subsequent carbene migratory insertion reactions, thus assisting in the construction of diverse arene/heteroarene scaffolds. Various transition-metal catalysts serve this purpose and provide efficient pathways for an easy access to substituted heterocycles. A brief introduction to metal-carbenes has been provided along with key mechanistic pathways underlying the coupling reactions. The purpose of this review is to provide a concise knowledge about diverse directing group-assisted coupling of varied arenes/heteroarenes and acceptor-acceptor/donor-acceptor diazo compounds. The review also highlights the synthesis of various carbocycles and fused heterocycles through diazo insertion pathways, via C-C, C-N and C-O bond forming reactions. The mechanism usually involves a C-H activation process, followed by diazo insertion leading to subsequent coupling.
Collapse
Affiliation(s)
- Neha Jha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhauri, Bhopal, 462066, Madhya Pradesh, India
| | - Nandkishor Prakash Khot
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhauri, Bhopal, 462066, Madhya Pradesh, India
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhauri, Bhopal, 462066, Madhya Pradesh, India
| |
Collapse
|
6
|
Pollack SR, Dion A. Metal-Free Stereoselective Synthesis of ( E)- and ( Z)-N-Monosubstituted β-Aminoacrylates via Condensation Reactions of Carbamates. J Org Chem 2021; 86:11748-11762. [PMID: 34479408 DOI: 10.1021/acs.joc.1c01212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
N-monosubstituted β-aminoacrylates are building blocks, which have been used in the preparation of amino acids and pharmaceuticals. Two efficient, stereoselective methods of preparation, via acid- or base-promoted condensation reactions of carbamates, are described. The base-promoted reaction is E-selective, while acid catalysis can, through the choice of solvent, selectively form E or Z. The acid-catalyzed E-selective process proceeds through a crystallization obviating the need for chromatographic purification.
Collapse
Affiliation(s)
- Scott R Pollack
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Amélie Dion
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| |
Collapse
|
7
|
Jiang Z, Zhou J, Zhu H, Liu H, Zhou Y. Rh(III)-Catalyzed [5 + 1] Annulation of Indole-enaminones with Diazo Compounds To Form Highly Functionalized Carbazoles. Org Lett 2021; 23:4406-4410. [PMID: 34018745 DOI: 10.1021/acs.orglett.1c01341] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A novel Rh(III)-catalyzed C-H activation/annulation cascade of indole-enaminones with diazo compounds was reported to construct diversely functionalized carbazole frameworks. The most notable characteristic is that this transformation could smoothly furnish a novel [5 + 1] cyclization product with good to excellent yields (up to 95%), accompanied by the thorough removal of acetyl and N,N-dimethyl groups of two substrates from the target products, rather than the normally expected [4 + 2] cyclization products.
Collapse
Affiliation(s)
- Zhidong Jiang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianhui Zhou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Haoran Zhu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Yu Zhou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| |
Collapse
|
8
|
Li J, Fang F, Wang R, Li Y, Xu B, Liu H, Zhou Y. A Rh(iii)-catalyzed C–H activation/regiospecific annulation cascade of benzoic acids with propargyl acetates to unusual 3-alkylidene-isochromanones. Org Chem Front 2021. [DOI: 10.1039/d1qo00387a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed a new approach to synthesize isochromanones with benzoic acids and propargyl acetates, which introducing an unusual exocyclic C–C double bond at the 3-position with high regioselectivity and moderate to excellent yields.
Collapse
Affiliation(s)
- Jiyuan Li
- Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
- State Key Laboratory of Drug Research
| | - Feifei Fang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Run Wang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Yuan Li
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Bin Xu
- Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
| | - Hong Liu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Yu Zhou
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| |
Collapse
|
9
|
A Direct and an Efficient Regioselective Synthesis of 1,2-Benzothiazine 1,1-dioxides, β-Carbolinones, Indolo[2,3- c]pyran-1-ones, Indolo[3,2- c]pyran-1-ones, Thieno[2,3- c]pyran-7-ones and Pyrano[3',4':4,5]imidazo[1,2- a]pyridin-1-ones via Tandem Stille/Heterocyclization Reaction. Molecules 2020; 25:molecules25215137. [PMID: 33158260 PMCID: PMC7663652 DOI: 10.3390/molecules25215137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 11/16/2022] Open
Abstract
A general regioselective one-pot synthesis of 1,2-benzothiazine 1,1-dioxides from 2-iodo benzenesulfonamide moieties and allenylstannanes is described using a domino Stille-like/Azacyclization reaction. The conditions developed also opened a novel access to β-carbolinones, indolopyranones, thienopyranones and pyrano-imidazopyridines.
Collapse
|
10
|
Rh(III)-Catalyzed C–H Bond Activation for the Construction of Heterocycles with sp3-Carbon Centers. Catalysts 2019. [DOI: 10.3390/catal9100823] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Rh(III)-catalyzed C–H activation features mild reaction conditions, good functional group tolerance, high reaction efficiency, and regioselectivity. Recently, it has attracted tremendous attention and has been employed to synthesize various heterocycles, such as indoles, isoquinolines, isoquinolones, pyrroles, pyridines, and polyheterocycles, which are important privileged structures in biological molecules, natural products, and agrochemicals. In this short review, we attempt to present an overview of recent advances in Rh(III)-mediated C–H bond activation to generate diverse heterocyclic scaffolds with sp3 carbon centers.
Collapse
|