1
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Hall MN, Lee M, Root TW, Davies HML, Stahl SS. Heterogeneous Fe-N-C Catalyst for Aerobic Dehydrogenation of Hydrazones to Diazo Compounds Used for Carbene Transfer. J Am Chem Soc 2024; 146:13741-13747. [PMID: 38717594 DOI: 10.1021/jacs.4c04430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Organic diazo compounds are versatile reagents in chemical synthesis and would benefit from improved synthetic accessibility, especially for larger scale applications. Here, we report a mild method for the synthesis of diazo compounds from hydrazones using a heterogeneous Fe-N-C catalyst, which has Fe ions dispersed within a graphitic nitrogen-doped carbon support. The reactions proceed readily at room temperature using O2 (1 atm) as the oxidant. Aryl diazoesters, ketones, and amides are accessible, in addition to less stable diaryl diazo compounds. Initial-rate data show that the Fe-N-C catalyst achieves faster rates than a heterogeneous Pt/C catalyst. The oxidative dehydrogenation of hydrazones may be performed in tandem with Rh-catalyzed enantioselective C-H insertion and cyclopropanation of alkenes, without requiring isolation of the diazo intermediate. This sequence is showcased by using a flow reactor for continuous synthesis of diazo compounds.
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Affiliation(s)
- Melissa N Hall
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Maizie Lee
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Thatcher W Root
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Huw M L Davies
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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2
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Milton JP, Milanowski A, Andersson M, Gryko D. Photochemical cyclopropanation in aqueous micellar media - experimental and theoretical studies. Chem Commun (Camb) 2024; 60:4483-4486. [PMID: 38564316 DOI: 10.1039/d4cc00828f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
While in nature, reactions occur in water-based confined compartments, for a long time, water has been often regarded as an unsuitable medium for organic reactions. We have, however, found that photochemical cyclopropanation of styrenes with diazo compounds or their precursors can be performed in micellar systems. COSMO-RS studies revealed that the reactivity correlates with the predicted critical micelle concentration (CMC), with higher CMC values delivering higher yields.
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Affiliation(s)
- Joseph P Milton
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland.
| | - Adam Milanowski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland.
- Department of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland
| | - Martin Andersson
- Center for Integrative Petroleum Research, King Fahd University of Petroleum and Minerals, Dhahran 31261, Kingdom of Saudi Arabia.
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland.
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3
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Nguyen TT, Navarro A, Ruble JC, Davies HML. Stereoselective Synthesis of Either Exo- or Endo-3-Azabicyclo[3.1.0]hexane-6-carboxylates by Dirhodium(II)-Catalyzed Cyclopropanation with Ethyl Diazoacetate under Low Catalyst Loadings. Org Lett 2024; 26:2832-2836. [PMID: 38166395 PMCID: PMC11020159 DOI: 10.1021/acs.orglett.3c03652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/01/2023] [Accepted: 12/01/2023] [Indexed: 01/04/2024]
Abstract
Although cyclopropanation with donor/acceptor carbenes can be conducted under low catalyst loadings (<0.001 mol %), such low loading has not been generally effective for other classes of carbenes such as acceptor carbenes. In this current study, we demonstrate that ethyl diazoacetate can be effectively used in the cyclopropanation of N-Boc-2,5-dihydropyrrole with dirhodium(II) catalyst loadings of 0.005 mol %. By appropriate choice of catalyst and hydrolysis conditions, either the exo- or endo-3-azabicyclo[3.1.0]hexanes can be formed cleanly with high levels of diastereoselectivity with no chromatographic purification.
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Affiliation(s)
| | - Antonio Navarro
- Lilly
Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - J. Craig Ruble
- Lilly
Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - Huw M. L. Davies
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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4
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Tanimoto H, Adachi R, Tanisawa K, Tomohiro T. Amphos-Mediated Conversion of Alkyl Azides to Diazo Compounds and One-Pot Azide-Site Selective Transient Protection, Click Conjugation, and Deprotective Transformation. Org Lett 2024. [PMID: 38502004 DOI: 10.1021/acs.orglett.4c00566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
A one-pot conversion of alkyl azides to diazo compounds is outlined. After the reaction of α-azidocarbonyl compounds with Amphos, treatment of the resulting phosphazides with silica gel in a wet solvent afforded α-diazo carbonyl products. Through the azido group protection property of Amphos, inter- and intramolecular azide-site selective reactions of azido group protection, click functionalization, and deprotection of the diazo group have been demonstrated in one pot.
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Affiliation(s)
- Hiroki Tanimoto
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ryo Adachi
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kodai Tanisawa
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Takenori Tomohiro
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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5
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Jadhao AR, Gaikwad SS. Copper-Catalyzed Direct Thiolation of Ketones Using Sulfonohydrazides: A Synthetic Route to Benzylic Thioethers. J Org Chem 2023; 88:14078-14087. [PMID: 37699245 DOI: 10.1021/acs.joc.3c01598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
A facile copper-catalyzed sustainable thiolation of ketones with sulfonohydrazides has been designed for the efficient construction of benzylic thioethers in excellent yield under mild reaction conditions. The current approach avoids the widely used thiolation reagent, thiols. The commercial availability of the base and reagents, broad substrate scope, and convenient reaction procedure make it an attractive method for benzylic thioether synthesis.
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Affiliation(s)
- Amardeep Ramprasad Jadhao
- Department of Chemistry, Late Pushpadevi Patil Arts & Science College Risod, Dist-Washim, Washim, Maharashtra 444506, India
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6
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Jin J, Li C, Wang R, Xia Z, Yan Q, Wang W, Gu S, Wang H, Chen F. Chemodivergent Synthesis of Sulfonamide and Sulfones from N-Tosylhydrazones by Switching Catalyst and Temperature. Org Lett 2023; 25:6012-6017. [PMID: 37555637 DOI: 10.1021/acs.orglett.3c02151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
A catalyst- and temperature-controlled selective synthesis of sulfonamide and sulfones from N-tosylhydrazones and MBH carbonates has been developed. The use of palladium catalysts exclusively leads to sulfonamide products at room temperature, whereas the selective synthesis of sulfones is dominant for a temperature-controlled coupling reaction without palladium catalysis. Importantly, the catalyst- or temperature-controlled reaction exhibits high nucleophilicity rather than carbene reactivity in these transformations.
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Affiliation(s)
- Jingru Jin
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Chunyan Li
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Rui Wang
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Zhimin Xia
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Qiongjiao Yan
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
| | - Wei Wang
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
| | - ShuangXi Gu
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
- Key laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan 430205, China
| | - Haifeng Wang
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
- Key laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan 430205, China
| | - Fener Chen
- Pharmaceutical Research Institute, Wuhan Institute of Technology, Wuhan 430205, China
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
- Shanghai Engineering Center of Industrial Catalysis for Chiral Drugs, Shanghai 200433, China
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7
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Hosoya M, Saito Y, Horiuchi Y. Honeycomb reactor: a promising device for streamlining aerobic oxidation under continuous-flow conditions. Beilstein J Org Chem 2023; 19:752-763. [PMID: 37284591 PMCID: PMC10241100 DOI: 10.3762/bjoc.19.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 05/15/2023] [Indexed: 06/08/2023] Open
Abstract
We report on the high potential of a honeycomb reactor for the use in aerobic oxidation under continuous-flow conditions. The honeycomb reactor is made of porous material with narrow channels separated by porous walls allowing for high density accumulation in the reactor. This structure raised the mixing efficiency of a gas-liquid reaction system, and it effectively accelerated the aerobic oxidation of benzyl alcohols to benzaldehydes under continuous-flow conditions. This reactor is a promising device for streamlining aerobic oxidation with high process safety because it is a closed system.
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Affiliation(s)
- Masahiro Hosoya
- API R&D Laboratory, Research Division, Shionogi & Co., Ltd., 1-1, Futaba-cho 3-Chome, Toyonaka, Osaka 561-0825, Japan
| | - Yusuke Saito
- Carbon Neutral Promotion Division, ARK Creation Centre, Cataler Corporation, 1905-10 Shimonobe, Iwata, Shizuoka 438-0112, Japan
| | - Yousuke Horiuchi
- Carbon Neutral Promotion Division, ARK Creation Centre, Cataler Corporation, 1905-10 Shimonobe, Iwata, Shizuoka 438-0112, Japan
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8
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Pandey AK, Chand S, Sharma AK, Singh KN. Copper-Catalyzed Thiolation of Hydrazones with Sodium Sulfinates: A Straightforward Synthesis of Benzylic Thioethers. J Org Chem 2023; 88:475-482. [PMID: 36520416 DOI: 10.1021/acs.joc.2c02451] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A facile and sustainable protocol for the thiolation of hydrazones with sodium sulfinates has been developed in the presence of CuBr2 and DBU in DMF to afford diverse benzylic thioethers. Control experiments reveal a radical pathway involving a thiyl radical as a key intermediate.
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Affiliation(s)
- Anand Kumar Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Shiv Chand
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Anup Kumar Sharma
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Krishna Nand Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
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9
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Czaikowski ME, McNeece AJ, Boyn JN, Jesse KA, Anferov SW, Filatov AS, Mazziotti DA, Anderson JS. Generation and Aerobic Oxidative Catalysis of a Cu(II) Superoxo Complex Supported by a Redox-Active Ligand. J Am Chem Soc 2022; 144:15569-15580. [PMID: 35977083 PMCID: PMC10017013 DOI: 10.1021/jacs.2c04630] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cu systems feature prominently in aerobic oxidative catalysis in both biology and synthetic chemistry. Metal ligand cooperativity is a common theme in both areas as exemplified by galactose oxidase and by aminoxyl radicals in alcohol oxidations. This has motivated investigations into the aerobic chemistry of Cu and specifically the isolation and study of Cu-superoxo species that are invoked as key catalytic intermediates. While several examples of complexes that model biologically relevant Cu(II) superoxo intermediates have been reported, they are not typically competent aerobic catalysts. Here, we report a new Cu complex of the redox-active ligand tBu,TolDHP (2,5-bis((2-t-butylhydrazono)(p-tolyl)methyl)-pyrrole) that activates O2 to generate a catalytically active Cu(II)-superoxo complex via ligand-based electron transfer. Characterization using ultraviolet (UV)-visible spectroscopy, Raman isotope labeling studies, and Cu extended X-ray absorption fine structure (EXAFS) analysis confirms the assignment of an end-on κ1 superoxo complex. This Cu-O2 complex engages in a range of aerobic catalytic oxidations with substrates including alcohols and aldehydes. These results demonstrate that bioinspired Cu systems can not only model important bioinorganic intermediates but can also mediate and provide mechanistic insight into aerobic oxidative transformations.
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Affiliation(s)
- Maia E Czaikowski
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Andrew J McNeece
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Jan-Niklas Boyn
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Kate A Jesse
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Sophie W Anferov
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Alexander S Filatov
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - David A Mazziotti
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - John S Anderson
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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10
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Xie J, Wu L, Lu P, Wang Y. Olefination of 3-Diazoindolin-2-imines with Hydrazones: An Approach toward Stereoselective Synthesis of ( E)-3-Arylideneindolin-2-imines. J Org Chem 2022; 87:10664-10672. [PMID: 35916772 DOI: 10.1021/acs.joc.2c00864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Stereoselective synthesis of (E)-3-arylideneindolin-2-imines from 3-diazoindolin-2-imines and hydrazones was achieved using copper bromide as the catalyst. The olefination reaction proceeded via copper-catalyzed aerobic oxidation of hydrazones to diazo compounds and copper-catalyzed cross coupling of two different diazo components in a tandem manner.
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Affiliation(s)
- Jianwei Xie
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Li Wu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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11
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Song L, Lai Y, Li H, Ding J, Yao H, Su Q, Huang B, Ouyang MA, Tong R. Environmentally Benign and User-Friendly In Situ Generation of Nitrile Imines from Hydrazones for 1,3-Dipolar Cycloaddition. J Org Chem 2022; 87:10550-10554. [PMID: 35866673 DOI: 10.1021/acs.joc.2c01391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitrile imines are highly reactive and versatile dipoles and conventionally generated in situ from unstable hydrazonyl halides under basic conditions. Herein, we report the first green and user-friendly protocol for in situ generation of nitrile imines from Oxone-KBr oxidation of hydrazones and base-promoted dehydrobromination. The nitrile imines were demonstrated for 1,3-dipolar cycloaddition with various dipolarophiles, including alkene and alkyne groups. With its green nature, ease of operation, and air and moisture tolerance, we expect our method will find wide applications in organic synthesis.
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Affiliation(s)
- Liyan Song
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Yunrong Lai
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Hongzuo Li
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Jipeng Ding
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Hongliang Yao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510275, Guangdong, China
| | - Qian Su
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Binbin Huang
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Ming-An Ouyang
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
| | - Rongbiao Tong
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510275, Guangdong, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon 999077, Hong Kong, China
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12
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Tanbouza N, Petti A, Leech MC, Caron L, Walsh JM, Lam K, Ollevier T. Electrosynthesis of Stabilized Diazo Compounds from Hydrazones. Org Lett 2022; 24:4665-4669. [PMID: 35727690 DOI: 10.1021/acs.orglett.2c01803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An electrochemical synthesis of diazo compounds from hydrazones in yields as high as 99% was performed. This method was elaborated as a useful synthetic method and demonstrated on various diazo compounds (24 examples). Apart from exhibiting an efficiency that matched that of commonly used harsh and toxic chemical oxidants, this reaction is practically simple to set up, requires mild conditions, and is highly electron efficient (3 F/mol).
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Affiliation(s)
- Nour Tanbouza
- Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Alessia Petti
- Department of Pharmaceutical, Chemical and Environmental Sciences, School of Science, University of Greenwich, Chatham Maritime, Chatham, Kent ME4 4TB, U.K
| | - Matthew C Leech
- Department of Pharmaceutical, Chemical and Environmental Sciences, School of Science, University of Greenwich, Chatham Maritime, Chatham, Kent ME4 4TB, U.K
| | - Laurent Caron
- Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Jamie M Walsh
- Department of Pharmaceutical, Chemical and Environmental Sciences, School of Science, University of Greenwich, Chatham Maritime, Chatham, Kent ME4 4TB, U.K
| | - Kevin Lam
- Department of Pharmaceutical, Chemical and Environmental Sciences, School of Science, University of Greenwich, Chatham Maritime, Chatham, Kent ME4 4TB, U.K
| | - Thierry Ollevier
- Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC G1V 0A6, Canada
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13
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Tanbouza N, Caron L, Khoshoei A, Ollevier T. Catalytic Bismuth(V)-Mediated Oxidation of Hydrazones into Diazo Compounds. Org Lett 2022; 24:2675-2678. [PMID: 35349286 DOI: 10.1021/acs.orglett.2c00762] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A new bismuth(V) oxidative catalytic system has been developed and applied for the conversion of hydrazones into diazo compounds. With the use of low catalytic amounts of Ph3Bi and AcOH with NaBO3·H2O as a terminal oxidant, the in situ formation of Ph3Bi(OAc)2 is capable of oxidizing hydrazones in excellent yields. The reaction was applied for the synthesis of diazocarbonyls and 2,2,2-trifluoromethyl diazoalkanes in good to excellent yields.
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Affiliation(s)
- Nour Tanbouza
- Département de Chimie, Université Laval, 1045 avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Laurent Caron
- Département de Chimie, Université Laval, 1045 avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Azadeh Khoshoei
- Département de Chimie, Université Laval, 1045 avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Thierry Ollevier
- Département de Chimie, Université Laval, 1045 avenue de la Médecine, Québec, Québec G1V 0A6, Canada
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14
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Autoxidation of 4-Hydrazinylquinolin-2(1 H)-one; Synthesis of Pyridazino[4,3- c:5,6- c']diquinoline-6,7(5 H,8 H)-diones. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072125. [PMID: 35408525 PMCID: PMC9000902 DOI: 10.3390/molecules27072125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/16/2022] [Accepted: 03/21/2022] [Indexed: 11/16/2022]
Abstract
An efficient synthesis of a series of pyridazino[4,3-c:5,6-c']diquinolines was achieved via the autoxidation of 4-hydrazinylquinolin-2(1H)-ones. IR, NMR (1H and 13C), mass spectral data, and elemental analysis were used to fit and elucidate the structures of the newly synthesized compounds. X-ray structure analysis and theoretical calculations unequivocally proved the formation of the structure. The possible mechanism for the reaction is also discussed.
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15
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Renault A, Joucla L, Lacote E. Catalytic Aerobic Oxidation of Hydrazines into 2‐Tetrazenes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anne Renault
- UCBL 1: Universite Claude Bernard Lyon 1 LHCEP FRANCE
| | - Lionel Joucla
- UCBL 1: Universite Claude Bernard Lyon 1 LHCEP FRANCE
| | - Emmanuel Lacote
- CNRS-Université de Lyon C2P2 43 bd du 11 novembre 1918 69616 Villeurbanne FRANCE
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16
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He F, Empel C, Koenigs RM. Silver-Catalyzed N-H Functionalization of Aryl/Aryl Diazoalkanes with Anilines. Org Lett 2021; 23:6719-6723. [PMID: 34427449 DOI: 10.1021/acs.orglett.1c02289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report on the N-H functionalization reaction of primary and secondary anilines with diaryldiazoalkanes using simple AgPF6 as catalyst. We demonstrated broad applicability in the reaction of diaryldiazoalkanes with different anilines (31 examples, up to 97% yield). Furthermore, we propose a possible reaction mechanism for the N-H functionalization.
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Affiliation(s)
- Feifei He
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Claire Empel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Rene M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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17
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Hatridge TA, Wei B, Davies HML, Jones CW. Copper-Catalyzed, Aerobic Oxidation of Hydrazone in a Three-Phase Packed Bed Reactor. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Taylor A. Hatridge
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Bo Wei
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Huw M. L. Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
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Wei B, Hatridge TA, Jones CW, Davies HML. Copper(II) Acetate-Induced Oxidation of Hydrazones to Diazo Compounds under Flow Conditions Followed by Dirhodium-Catalyzed Enantioselective Cyclopropanation Reactions. Org Lett 2021; 23:5363-5367. [PMID: 34228465 DOI: 10.1021/acs.orglett.1c01580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A tandem system comprising in-line diazo compound synthesis and downstream consumption in a rhodium-catalyzed cyclopropanation reaction has been developed. Passing hydrazone through a silica column absorbed with Cu(OAc)2-H2O/N,N-dimethylaminopyridine oxidized the hydrazone to generate an aryldiazoacetate in flow. The crude aryldiazoacetate elutes from this column directly into a downstream cyclopropanation reaction, catalyzed by the chiral dirhodium tetracarboxylates, Rh2(R-p-Ph-TPCP)4 and Rh2(R-PTAD)4. This convenient flow to batch method was applied to the synthesis of a range of 1,2-diarylcyclopropane-1-carboxylates in high yields and with high levels of enantioselectivity.
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Affiliation(s)
- Bo Wei
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Taylor A Hatridge
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive Northwest, Atlanta, Georgia 30332, United States
| | - Christopher W Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive Northwest, Atlanta, Georgia 30332, United States
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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