1
|
Regioselective
ortho
‐sulfonamidation: Exploration of Intrinsic Directing Property of β‐Carbolines and their Photophysical Studies. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100602] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
2
|
Ke S, Xu T, Min Y, Wan Z, Yang Z, Wang K. Marine Alkaloid Pityriacitrin and Its Analogues: Discovery, Structures, Synthetic Methods and Biological Properties. Mini Rev Med Chem 2021; 21:233-244. [PMID: 33200706 DOI: 10.2174/1389557520666201116144156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 09/18/2020] [Accepted: 09/18/2020] [Indexed: 11/22/2022]
Abstract
Pityriacitrin is a natural marine alkaloid with a typical β-carboline scaffold, and which has been demonstrated to exhibit diverse biological functions. The special structural features for pityriacitrin lead to the increasing research interest and the emergence of versatile derivatives, and many pityriacitrin analogues have been isolated or synthesized over the past decades. The structural diversity and evolved biological activity of these natural alkaloids can offer opportunities for the development of highly potential novel drugs with a new mechanism of action, and therefore, the aim of this brief review is to describe the discovery, synthesis, and biological properties of natural pityriacitrin and its derivatives, as well as the isolation source.
Collapse
Affiliation(s)
- Shaoyong Ke
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Tingting Xu
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Yong Min
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Zhongyi Wan
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Ziwen Yang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Kaimei Wang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| |
Collapse
|
3
|
Abdolalian P, Tizhoush SK, Farshadfar K, Ariafard A. The role of hypervalent iodine(iii) reagents in promoting alkoxylation of unactivated C(sp 3)-H bonds catalyzed by palladium(ii) complexes. Chem Sci 2021; 12:7185-7195. [PMID: 34123345 PMCID: PMC8153247 DOI: 10.1039/d1sc01230d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/14/2021] [Indexed: 11/21/2022] Open
Abstract
Although Pd(OAc)2-catalysed alkoxylation of the C(sp3)-H bonds mediated by hypervalent iodine(iii) reagents (ArIX2) has been developed by several prominent researchers, there is no clear mechanism yet for such crucial transformations. In this study, we shed light on this important issue with the aid of the density functional theory (DFT) calculations for alkoxylation of butyramide derivatives. We found that the previously proposed mechanism in the literature is not consistent with the experimental observations and thus cannot be operating. The calculations allowed us to discover an unprecedented mechanism composed of four main steps as follows: (i) activation of the C(sp3)-H bond, (ii) oxidative addition, (iii) reductive elimination and (iv) regeneration of the active catalyst. After completion of step (i) via the CMD mechanism, the oxidative addition commences with an X ligand transfer from the iodine(iii) reagent (ArIX2) to Pd(ii) to form a square pyramidal complex in which an iodonium occupies the apical position. Interestingly, a simple isomerization of the resultant five-coordinate complex triggers the Pd(ii) oxidation. Accordingly, the movement of the ligand trans to the Pd-C(sp3) bond to the apical position promotes the electron transfer from Pd(ii) to iodine(iii), resulting in the reduction of iodine(iii) concomitant with the ejection of the second X ligand as a free anion. The ensuing Pd(iv) complex then undergoes the C-O reductive elimination by nucleophilic attack of the solvent (alcohol) on the sp3 carbon via an outer-sphere SN2 mechanism assisted by the X- anion. Noteworthy, starting from the five coordinate complex, the oxidative addition and reductive elimination processes occur with a very low activation barrier (ΔG ‡ 0-6 kcal mol-1). The strong coordination of the alkoxylated product to the Pd(ii) centre causes the regeneration of the active catalyst, i.e. step (iv), to be considerably endergonic, leading to subsequent catalytic cycles to proceed with a much higher activation barrier than the first cycle. We also found that although, in most cases, the alkoxylation reactions proceed via a Pd(ii)-Pd(iv)-Pd(ii) catalytic cycle, the other alternative in which the oxidation state of the Pd(ii) centre remains unchanged during the catalysis could be operative, depending on the nature of the organic substrate.
Collapse
Affiliation(s)
- Payam Abdolalian
- Department of Chemistry, Islamic Azad University Central Tehran Branch, Poonak Tehran 1469669191 Iran
| | - Samaneh K Tizhoush
- Department of Chemistry, Islamic Azad University Central Tehran Branch, Poonak Tehran 1469669191 Iran
| | - Kaveh Farshadfar
- Department of Chemistry, Islamic Azad University Central Tehran Branch, Poonak Tehran 1469669191 Iran
| | - Alireza Ariafard
- Department of Chemistry, Islamic Azad University Central Tehran Branch, Poonak Tehran 1469669191 Iran
- School of Natural Sciences - Chemistry, University of Tasmania Private Bag 75 Hobart TAS 7001 Australia
| |
Collapse
|
4
|
Application of Transition Metal‐Catalyzed C−H Activation Strategies in the Synthesis and Functionalization of β‐Carbolines. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100055] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
5
|
Sato T, Nogi K, Yorimitsu H. Palladium‐Catalyzed
peri
‐Selective C−H Fluoroalkoxylation of Aryl Sulfoxides. ChemCatChem 2020. [DOI: 10.1002/cctc.202000485] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tomohiko Sato
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Keisuke Nogi
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| |
Collapse
|
6
|
Li G, Jia C, Cai X, Zhong L, Zou L, Cui X. Ruthenium-catalyzed meta-C-H bond alkylation of aryl 2-pyridyl ketones. Chem Commun (Camb) 2019; 56:293-296. [PMID: 31808492 DOI: 10.1039/c9cc08624b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of meta-selective CAr-H bond functionalization of aryl 2-pyridyl ketones has been developed using [Ru(p-cymene)Cl2]2 as the catalyst and alkyl bromide as the coupling reagent. This development provides an efficient strategy for modifying the meta-position of aryl 2-pyridyl ketone skeletons, which are found in various functional molecules.
Collapse
Affiliation(s)
- Gang Li
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
| | | | | | | | | | | |
Collapse
|
7
|
Kumar J, Gupta A, Bhadra S. Pd II-Catalyzed methoxylation of C(sp 3)-H bonds adjacent to benzoxazoles and benzothiazoles. Org Biomol Chem 2019; 17:3314-3318. [PMID: 30860234 DOI: 10.1039/c9ob00337a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The Pd(OAc)2/PhI(OAc)2 catalyst system promotes the highly regioselective dehydrogenative methoxylation of a C(sp3)-H bond adjacent to benzoxazole and benzothiazole rings. The title transformation constitutes the first example of a Pd-catalyzed C(sp3)-H activating methoxylation at the proximal-selective α-position with regard to a directing auxiliary and provides expedient access to an important class of azole-decorated methyl ethers (up to 90% isolated yield). The synthetic practicality of the methodology was demonstrated by achieving α-methoxyacetic acids via the elimination of the benzoxazole auxiliaries and by obtaining the precursor of an O-methylated Breslow intermediate.
Collapse
Affiliation(s)
- Jogendra Kumar
- Inorganic Materials and Catalysis Division, Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, Gujarat, India.
| | | | | |
Collapse
|
8
|
Yang Q, Han X, Zhao J, Zhang HY, Zhang Y. Direct C3 Alkoxylation of Quinoxalin-2(1H)-ones with Alcohols via Cross-Dehydrogenative Coupling under Catalyst-Free Conditions. J Org Chem 2019; 84:11417-11424. [DOI: 10.1021/acs.joc.9b01181] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qiming Yang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Xulin Han
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Jiquan Zhao
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Hong-Yu Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Yuecheng Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, P. R. China
| |
Collapse
|
9
|
Zhang G, Zhu J, Ding C. Pharmaceutical-Oriented Iron-Catalyzed Ethoxylation of Aryl C(sp
2
)-H Bonds with Cobalt Co-Catalyst. ChemistrySelect 2018. [DOI: 10.1002/slct.201801881] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Guofu Zhang
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014, People's Republic of China
| | - Jianfei Zhu
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014, People's Republic of China
| | - Chengrong Ding
- College of Chemical Engineering; Zhejiang University of Technology; Hangzhou 310014, People's Republic of China
| |
Collapse
|
10
|
Han JN, Du C, Zhu X, Wang ZL, Zhu Y, Chu ZY, Niu JL, Song MP. Cobalt-catalyzed peri-selective alkoxylation of 1-naphthylamine derivatives. Beilstein J Org Chem 2018; 14:2090-2097. [PMID: 30202462 PMCID: PMC6122339 DOI: 10.3762/bjoc.14.183] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 07/30/2018] [Indexed: 11/23/2022] Open
Abstract
A cobalt-catalyzed C(sp2)-H alkoxylation of 1-naphthylamine derivatives has been disclosed, which represents an efficient approach to synthesize aryl ethers with broad functional group tolerance. It is noteworthy that secondary alcohols, such as hexafluoroisopropanol, isopropanol, isobutanol, and isopentanol, were well tolerated under the current catalytic system. Moreover, a series of biologically relevant fluorine-aryl ethers were easily obtained under mild reaction conditions after the removal of the directing group.
Collapse
Affiliation(s)
- Jiao-Na Han
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Cong Du
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Xinju Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Zheng-Long Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Yue Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Zhao-Yang Chu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Jun-Long Niu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Mao-Ping Song
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| |
Collapse
|
11
|
Mandal S, Bera T, Dubey G, Saha J, Laha JK. Uses of K2S2O8 in Metal-Catalyzed and Metal-Free Oxidative Transformations. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00743] [Citation(s) in RCA: 147] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sudip Mandal
- Centre of Biomedical Research, Division of Molecular Synthesis and Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Tishyasoumya Bera
- Centre of Biomedical Research, Division of Molecular Synthesis and Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Gurudutt Dubey
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Jaideep Saha
- Centre of Biomedical Research, Division of Molecular Synthesis and Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| |
Collapse
|
12
|
Qiu FC, Xie Q, Guan BT. Palladium-Catalyzed ortho
-Alkoxylation of Tertiary Benzamides: H2
SO4
as an Effective Additive. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700525] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Fang-Cheng Qiu
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Qi Xie
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Bing-Tao Guan
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
- Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; Tianjin 300071 China
| |
Collapse
|
13
|
Yang L, Li S, Cai L, Ding Y, Fu L, Cai Z, Ji H, Li G. Palladium-Catalyzed C–H Trifluoroethoxylation of N-Sulfonylbenzamides. Org Lett 2017; 19:2746-2749. [DOI: 10.1021/acs.orglett.7b01103] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Long Yang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Shangda Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Lei Cai
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Yongzheng Ding
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Lei Fu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Zhihua Cai
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Huafang Ji
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Gang Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology and ‡State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| |
Collapse
|
14
|
Le Bras J, Muzart J. Dehydrogenative (Hetero)arene Alkoxylations Triggered by PdII
-Catalyzed C(sp2
)-H Activation and Coordinating Substituent: PdII,III
or PdIV
Complex as Key Intermediate? European J Org Chem 2017. [DOI: 10.1002/ejoc.201601592] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jean Le Bras
- Institut de Chimie Moléculaire de Reims, UMR 7312; CNRS - Université de Reims Champagne-Ardenne; B. P. 1039 51687 Reims Cedex 2 France
| | - Jacques Muzart
- Institut de Chimie Moléculaire de Reims, UMR 7312; CNRS - Université de Reims Champagne-Ardenne; B. P. 1039 51687 Reims Cedex 2 France
| |
Collapse
|
15
|
Dighe SU, Samanta SK, Kolle S, Batra S. Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
16
|
Jin W, Zheng P, Wong WT, Law GL. Efficient Selenium-Catalyzed Selective C(sp3)−H Oxidation of Benzylpyridines with Molecular Oxygen. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601065] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Weiwei Jin
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hum Kowloon Hong Kong
| | - Poonnapa Zheng
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hum Kowloon Hong Kong
| | - Wing-Tak Wong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hum Kowloon Hong Kong
| | - Ga-Lai Law
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hum Kowloon Hong Kong
| |
Collapse
|
17
|
Li S, Zhu W, Gao F, Li C, Wang J, Liu H. Palladium-Catalyzed Ortho-Alkoxylation of N-Benzoyl α-Amino Acid Derivatives at Room Temperature. J Org Chem 2016; 82:126-134. [PMID: 27935311 DOI: 10.1021/acs.joc.6b02257] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient palladium-catalyzed ortho-alkoxylation of N-benzoyl α-amino acid derivatives at room temperature has been explored. This novel transformation, using amino acids as directing groups, Pd(OAc)2 as catalyst, alcohols as the alkoxylation reagents, and PhI(OAc)2 as the oxidant, showed wide generality, good functional tolerance, and high monoselectivity and regioselectivity.
Collapse
Affiliation(s)
- Shuangjie Li
- School of Pharmacy, China Pharmaceutical University , Jiangsu Nanjing 210009, P. R. China
| | - Wei Zhu
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Feng Gao
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Chunpu Li
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Jiang Wang
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Hong Liu
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| |
Collapse
|
18
|
Yu M, Wang Z, Tian M, Lu C, Li S, Du H. Purinyl N(3)-Directed Palladium-Catalyzed C-H Alkoxylation of N(9)-Arylpurines: A Late-Stage Strategy to Synthesize N(9)-(ortho-Alkoxyl)arylpurines. J Org Chem 2016; 81:3435-42. [PMID: 27015589 DOI: 10.1021/acs.joc.6b00148] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A palladium-catalyzed alkoxylation of N(9)-arylpurines with primary or secondary alcohols has been developed successfully, which is a rare C-H activation reaction of polynitrogenated purines and offers a late-stage strategy to synthesize N(9)-(ortho-alkoxyl)arylpurines. Although there are more than four nitrogen atoms present in the purine moiety, the reaction can be effectively conducted by sterically blocking the N(1) site for catalyst coordination and first employing the purinyl N(3) atom as a directing group.
Collapse
Affiliation(s)
- Mingwu Yu
- Faculty of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| | - Zhiqian Wang
- Faculty of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| | - Miao Tian
- Faculty of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| | - Chenghu Lu
- Faculty of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| | - Shunlai Li
- Faculty of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| | - Hongguang Du
- Faculty of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| |
Collapse
|
19
|
Kolle S, Batra S. β-Carboline-directed decarboxylative acylation of ortho-C(sp2)–H of the aryl ring of aryl(β-carbolin-1-yl)methanones with α-ketoacids under palladium catalysis. RSC Adv 2016. [DOI: 10.1039/c6ra11811a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A Pd-catalysed β-carboline assisted decarboxylative acylation of ortho-C(sp2)–H of aryl ring of aryl(β-carbolin-1-yl)methanones using α-oxocarboxylic acid as the acyl ion source to form (2-aroylaryl)(β-carbolin-2-yl)methanones is demonstrated.
Collapse
Affiliation(s)
- Shivalinga Kolle
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
| | - Sanjay Batra
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
- Academy for Scientific and Innovative Research
| |
Collapse
|