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Dan JH, Huang R, Wang J, Cheng CR. Copper-Catalyzed P-H Bond Functionalization to Construct Biaryl Phosphafluorene Oxides. J Org Chem 2024; 89:10639-10643. [PMID: 38992858 DOI: 10.1021/acs.joc.4c00844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
In this study, in the presence of a certain amount of cuprous chloride catalyst and the synergistic action of ligand and base, the P-H bond activation of secondary biarylphosphine oxides and the attack on the β-site of orthoaryl groups were investigated. Phosphafluorene oxide was synthesized by C-H bond activation and an intramolecular dehydrogenation coupling reaction to construct a C-P bond. Subsequently, we conducted a control experiment and made reasonable speculations about its mechanism. In addition, the use of phosphafluorene as a ligand in some synthetic catalytic reactions has shown excellent results, demonstrating its excellent catalytic properties.
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Affiliation(s)
- Jia-Huan Dan
- School of Chemical Engineering, Sichuan University of Science and Technology, No.180 Xueyuan Street, Huixing Road, Zigong, Sichuan 643000, China
| | - Rui Huang
- School of Chemical Engineering, Sichuan University of Science and Technology, No.180 Xueyuan Street, Huixing Road, Zigong, Sichuan 643000, China
| | - Juan Wang
- School of Chemical Engineering, Sichuan University of Science and Technology, No.180 Xueyuan Street, Huixing Road, Zigong, Sichuan 643000, China
| | - Chun-Ru Cheng
- School of Chemical Engineering, Sichuan University of Science and Technology, No.180 Xueyuan Street, Huixing Road, Zigong, Sichuan 643000, China
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2
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Yang XX, Wu MY, Wang SQ, Yang SD. Eight-Membered Palladacycle Intermediate Enabled Synthesis of Cyclic Biarylphosphonates. Chemistry 2024; 30:e202302416. [PMID: 37792811 DOI: 10.1002/chem.202302416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/20/2023] [Accepted: 10/02/2023] [Indexed: 10/06/2023]
Abstract
Transition-metal-catalyzed coupling reactions that involve the direct functionalization of insert C-H bond represent one of the most efficient strategies for forming carbon-carbon bonds. Herein, a palladium-catalyzed intramolecular C-H bond arylation of triaryl phosphates is reported to access seven-membered cyclic biarylphosphonate targets. The reaction is achieved via a unique eight-membered palladacyclic intermediate and shows good functional group compatibility. Meanwhile, the product can be readily converted into other valuable phosphate compounds.
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Affiliation(s)
- Xin-Xin Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Ming-Ying Wu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Shao-Qiu Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
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3
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Wu SF, Zhang GK, Wang X, He ZJ, Zhang YC, Shi F. Organocatalytic Diastereoselective (4 + 1) Cycloaddition of o-Hydroxyphenyl-Substituted Secondary Phosphine Oxides. J Org Chem 2023; 88:16497-16510. [PMID: 37982674 DOI: 10.1021/acs.joc.3c01990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
The first organocatalytic diastereoselective (4 + 1) cycloaddition of o-hydroxyphenyl-substituted secondary phosphine oxides (SPOs) has been established, which makes use of o-hydroxyphenyl substituted SPOs as suitable four-atom phosphorus-containing 1,4-dinucleophiles and 3-indolylformaldehydes as competent 1,1-dielectrophiles under Bro̷nsted acid catalysis. The reaction mechanism was suggested to involve the formation of 3-indolylmethanol intermediates and vinyliminium intermediates, which played an important role in controlling the reactivity and diastereoselectivity of the (4 + 1) cycloaddition under Bro̷nsted acid catalysis. By this approach, a series of benzo oxaphospholes bearing P- and C-stereocenters were synthesized in moderate to good yields (50%-95% yields) with excellent diastereoselectivities (all >95:5 dr). This reaction not only represents the first organocatalytic diastereoselective (4 + 1) cycloaddition of o-hydroxyphenyl-substituted SPOs but also provides an efficient and diastereoselective method for the construction of phosphorus-containing benzo five-membered heterocyclic skeletons bearing both P-stereocenter and C-stereocenter.
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Affiliation(s)
- Shu-Fang Wu
- Research Center of Chiral Functional Heterocycles, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Guo-Ke Zhang
- Research Center of Chiral Functional Heterocycles, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Xue Wang
- Research Center of Chiral Functional Heterocycles, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Zhuo-Jing He
- Research Center of Chiral Functional Heterocycles, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Yu-Chen Zhang
- Research Center of Chiral Functional Heterocycles, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Feng Shi
- Research Center of Chiral Functional Heterocycles, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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Cen K, Wei J, Feng Y, Liu Y, Wang X, Liu Y, Yin Y, Yu J, Wang D, Cai J. Synthesis of fused 3-trifluoromethyl-1,2,4-triazoles via base-promoted [3 + 2] cycloaddition of nitrile imines and 1 H-benzo[ d]imidazole-2-thiols. Org Biomol Chem 2023; 21:7095-7099. [PMID: 37622281 DOI: 10.1039/d3ob01133j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Here we report a strategy for the facile assembly of fused 3-trifluoromethyl-1,2,4-triazoles, which are difficult to synthesize using traditional strategies, in 50-96% yields through a triethylamine-promoted intermolecular [3 + 2] cycloaddition pathway. This protocol features high efficiency, good functional group tolerance, mild conditions, and easy operation. Furthermore, a gram-scale reaction and product derivatizations were carried out smoothly to illustrate the practicability of this method.
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Affiliation(s)
- Kaili Cen
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China.
| | - Jiahao Wei
- School of Pharmaceutical Science, University of South China, Hengyang 421001, Hunan, China
| | - Yuting Feng
- Chuanshan College University of South China, Hengyang 421001, Hunan, China
| | - Yuan Liu
- Chuanshan College University of South China, Hengyang 421001, Hunan, China
| | - Xinye Wang
- Chuanshan College University of South China, Hengyang 421001, Hunan, China
| | - Yangyu Liu
- Chuanshan College University of South China, Hengyang 421001, Hunan, China
| | - Yalin Yin
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China.
| | - Junhong Yu
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China.
| | - Dahan Wang
- Department of Food and Chemical Engineering, Shaoyang University, Shaoyang 422100, Hunan, China.
| | - Jinhui Cai
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China.
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Tali JA, Shankar R. Ru(II)-Catalyzed Synthesis of Fused Imidazo[1,2- a]pyridine-chromenones and Methylene-Tethered Bis-imidazo[1,2- a]pyridines and Regioselective O-Acetoxylation of Imidazo[1,2- a]pyridines. Org Lett 2023; 25:3200-3205. [PMID: 37140128 DOI: 10.1021/acs.orglett.3c00578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Herein, we disclose an unprecedented protocol via ruthenium-catalyzed annulation for the synthesis of 6H-chromeno[4',3':4,5]imidazo[1,2-a]pyridin-6-one, and functionalized 2-(3-formylimidazo[1,2-a]pyridin-2-yl)phenyl acetate has been revealed by intramolecular chelation-assisted C-H activation. Additionally, a one-pot approach for creating bis(2-phenylimidazo[1,2-a]pyridin-3-yl)methane (BIP) has been realized through ruthenium catalysis with the use of formic acid. This method was used in gram-scale synthesis of BIP and step-economical late-stage functionalization of a marketed drug, zolimidine, in good yield.
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Affiliation(s)
- Javeed Ahmad Tali
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu 180001, India
| | - Ravi Shankar
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu 180001, India
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Dong DQ, Tian BL, Yang H, Wei ZH, Yang SH, Zhou MY, Ding CZ, Wang YL, Gao JH, Wang SJ, Yang WC, Liu BT, Wang ZL. Visible light induced palladium-catalyzed reactions involving halogenated hydrocarbon (RX). MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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Hu J, Chai Z, Liu W, Wei J, Lv ZJ, Zhang WX. Direct and chlorine-free synthesis of phosphafluorenes or their oxides from white phosphorus. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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8
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Phosphine oxide directing-group-enabled atroposelective C–H bond acyloxylation via an eight-membered palladacycle intermediate. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhang P, Li Z, Liu Y, Shi F, Wang L, Pu M, Lei M. Hydride Relay Exchange Mechanism for the Heterocyclic C-H Arylation of Benzofuran and Benzothiophene Catalyzed by Pd Complexes. J Org Chem 2022; 87:12997-13010. [PMID: 36166363 DOI: 10.1021/acs.joc.2c01545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism and regioselectivity of the heterocyclic C-H arylation of benzofuran and benzothiophene catalyzed by Pd(OAc)2 complexes were investigated using the density functional theory (DFT) method. The Pd(0)L2(PhI) complex (L = HOAc) is proposed to be the catalytic species. Compared to the traditional Heck-type mechanism, concerted metalation-deprotonation (CMD) mechanism, and electrophilic aromatic substitution (SEAr) mechanism for the C-H arylation, a new hydride relay exchange mechanism was proposed for the benzoheterocyclic C-H arylation catalyzed by Pd complexes, which consists of two redox processes between Pd(II) and Pd(0) species to complete the regioselective C-H activation. The calculated results indicate that the reaction along the hydride relay exchange mechanism is more favorable than those along other mechanisms, including the traditional Heck-type mechanism and the base-assisted anti-H elimination mechanism. This agrees well with the experimental results. Meanwhile, the origin for the regioselective C-H arylation was unveiled in which the α-C-H arylation products are major for the heterocyclic C-H arylation of benzofuran, but the β-C-H arylation products are major for that of benzothiophene. This study might provide a deep mechanistic understanding on the regioselective C-H activation and arylation of benzoheterocycle compounds catalyzed by transition-metal complexes.
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Affiliation(s)
- Peihuan Zhang
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhewei Li
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Yangqiu Liu
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Fuxing Shi
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Luocong Wang
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Min Pu
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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