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Cui PC, Wang GW. Silver(I)-catalyzed highly para-selective phosphonation of 2-aryloxazolines. Chem Commun (Camb) 2024; 60:3150-3153. [PMID: 38407840 DOI: 10.1039/d3cc06241d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
A silver-catalyzed phosphonation of 2-aryloxazolines has been accomplished. This protocol provides highly regioselective access to para-phosphonation products with good functional group tolerance and moderate to good yields via cross-dehydrogenation coupling. Mechanistic studies have shown that para-phosphonation products are obtained via a radical pathway. Furthermore, the directing oxazoline group in the para-phosphonation products is removable and can be converted to benzoic esters.
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Affiliation(s)
- Peng-Cheng Cui
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Guan-Wu Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
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2
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Zhang X, Wang T, Cui S, Li L, Zheng Z, Mi C, Lin B, Ren X, He X. Design of Photosensitive Cobalt Complex Intermediates and Their Application in the Green Syntheses of Molecules Containing the Quinazolin-4(3 H)-imine Scaffold. J Org Chem 2022; 87:8303-8315. [PMID: 35709489 DOI: 10.1021/acs.joc.1c02987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cobalt/photoredox cooperative catalysis is a well-explored technology for visible-light photoredox catalysis. Recently, the photosensitivity of Co(II) complexes in homogeneous catalysis has aroused the interest of scientists. In this study, photosensitive Co(II) complex intermediates were designed to develop new synthetic methods. These intermediates, consisting of Co(II) and two substrate molecules, bind to O2 and absorb visible light over a wide spectral range, triggering in situ oxidative decarboxylation to produce molecules containing the quinazolin-4(3H)-imine scaffold. These reactions employed glyoxylic acid and ketoacids as new building blocks, and good to excellent yields of the corresponding products were obtained under mild reaction conditions using green and inexpensive reagents and solvents. These results are of importance since the design of Co-based photosensitive intermediates will aid in establishing novel methods for harnessing visible light and hence lead to innovation in organic syntheses.
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Affiliation(s)
- Xianwei Zhang
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, 27 Taiping Road, Haidian District, Beijing 100850, China
| | - Tianzhao Wang
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Shisheng Cui
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, 27 Taiping Road, Haidian District, Beijing 100850, China
| | - Lei Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Zhibing Zheng
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, 27 Taiping Road, Haidian District, Beijing 100850, China
| | - Chunlai Mi
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, 27 Taiping Road, Haidian District, Beijing 100850, China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Xuhong Ren
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Xinhua He
- State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, 27 Taiping Road, Haidian District, Beijing 100850, China
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Electrochemically driven regioselective C-H phosphorylation of group 8 metallocenes. Nat Commun 2022; 13:3496. [PMID: 35715392 PMCID: PMC9206016 DOI: 10.1038/s41467-022-31178-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 06/01/2022] [Indexed: 01/11/2023] Open
Abstract
Metallocenes are privileged backbones for synthesis and catalysis. However, the direct dehydrogenative C−H functionalization of unsymmetric metallocenes suffers from reactivity and selectivity issues. Herein, we report an electrochemically driven regioselective C−H phosphorylation of group 8 metallocenes. Mechanistic investigations indicate this dehydrogenative cross coupling occurs through an electrophilic radical substitution of the metallocene with a phosphoryl radical, facilitated by the metallocene itself. This work not only offers an efficient and divergent synthesis of phosphorylated metallocenes, but also provides a guide to interpret the reactivity and regioselectivity for the C−H functionalization of unsymmetric metallocenes. Metallocene-based phosphines are compounds with potential use in catalysis. Here, the authors report the electrochemical regioselective functionalization of group 8 metallocenes with phosphine oxides; over 60 examples of phosphorylated (benzo)ferrocenes and ruthenocenes can be accessed via this method without the need for a preinstalled directing group.
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Wang Y, Liu R, Zhou P, Wu J, Li W, Wang C, Li H, Li D, Yang J. Visible Light‐Driven Base‐Promoted Radical Cascade Difluoroalkylization‐cyclization‐iodination of 1,6‐Enynes with Ethyl Difluoroiodoacetate. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101395] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yan Wang
- Ningxia University School of chemistry and chemical Engineering 539 West Helan Mountains road, Xixia District, Yinchuan 750000 Yinchuan CHINA
| | - Ruyan Liu
- Ningxia University School of Chemistry and Chemical Engineering CHINA
| | - Pengsheng Zhou
- Ningxia University School of Chemistry and Chemical Engineering CHINA
| | - Jianglong Wu
- Ningxia University School of Chemistry and Chemical Engineering CHINA
| | - Wenshuang Li
- Ningxia University School of Chemistry and Chemical Engineering CHINA
| | - Chenyu Wang
- Ningxia University School of Chemistry and Chemical Engineering CHINA
| | - Hao Li
- Ningxia University School of Chemistry and Chemical Engineering CHINA
| | - Dianjun Li
- Ningxia University State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering CHINA
| | - Jinhui Yang
- Ningxia University State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering China, Ning Xia, Yinchuan, Xixia District Ningxia University B 750021 Yinchuan CHINA
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6
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Hore S, Singh RP. Phosphorylation of arenes, heteroarenes, alkenes, carbonyls and imines by dehydrogenative cross-coupling of P(O)-H and P(R)-H. Org Biomol Chem 2021; 20:498-537. [PMID: 34904988 DOI: 10.1039/d1ob02003j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Organophosphorous compounds have recently emerged as a powerful class of compounds with widespread applications, such as in bioactive natural products, pharmaceuticals, agrochemicals and organic materials, and as ligands in catalysis. The preparation of these compounds requires synthetic techniques with novel catalytic systems varying from transition metal, photo- and electrochemical catalysis to transformations without metal catalysts. Over the past few decades, the addition of P-H bonds to alkenes, alkynes, arenes, heteroarenes and other unsaturated substrates in hydrophosphination and other related reactions via the above-mentioned catalytic processes has emerged as an atom economical approach to obtain organophosphorus compounds. In most of the catalytic cycles, the P-H bond is cleaved to yield a phosphorus-based radical, which adds onto the unsaturated substrate followed by reduction of the corresponding radical yielding the product.
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Affiliation(s)
- Soumyadip Hore
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi-110016, India.
| | - Ravi P Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi-110016, India.
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Fu Y, Duan F, Du Z. Visible Light Driven Oxidative Coupling of Amines and P(O)−H/P−OR Compounds under Photocatalyst‐Free Conditions. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ying Fu
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 P. R. China
| | - Fei Duan
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 P. R. China
| | - Zhengyin Du
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 P. R. China
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Peng K, Dong Z. Recent Advances in Cross‐Dehydrogenative Couplings (CDC) of C−H Bond in Aqueous Media. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001358] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Kang Peng
- School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Zhi‐Bing Dong
- School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China
- School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 People's Republic of China
- Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
- Hubei key Laboratory of Novel Reactor and Green Chemistry Technology Wuhan Institute of Technology Wuhan 430205 People's Repubic of China
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9
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Xiong Y, Zhang J, Qi L, Zhang Y, Wang T. Oxidative C(SP2)‐P Formation: Direct Construction of C‐P Bond on Quinoxalines via Aromatic Phosphorous Oxide. ChemistrySelect 2021. [DOI: 10.1002/slct.202004036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yunkui Xiong
- National Research center for Carbohydrate synthesis Jiangxi Province's key Laboratory of Chemical Biology Jiangxi Normal university, Nanchang Jiangxi 330022 China
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
| | - Jianye Zhang
- National Research center for Carbohydrate synthesis Jiangxi Province's key Laboratory of Chemical Biology Jiangxi Normal university, Nanchang Jiangxi 330022 China
| | - Liping Qi
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
| | - Yu Zhang
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
| | - Tao Wang
- National Research center for Carbohydrate synthesis Jiangxi Province's key Laboratory of Chemical Biology Jiangxi Normal university, Nanchang Jiangxi 330022 China
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang, Jiangxi 330022 China
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