1
|
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.
Collapse
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
| |
Collapse
|
2
|
Tuck JR, Dunlap LE, Olson DE. Synthetic Strategies toward Lysergic Acid Diethylamide: Ergoline Synthesis via α-Arylation, Borrowing Hydrogen Alkylation, and C-H Insertion. J Org Chem 2023; 88:13712-13719. [PMID: 37697477 PMCID: PMC10591856 DOI: 10.1021/acs.joc.3c01363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Lysergic acid diethylamide (LSD), a semisynthetic ergoline alkaloid analogue and hallucinogen, is a potent psychoplastogen with promising therapeutic potential. While a variety of synthetic strategies for accessing ergoline alkaloids have emerged, the complexity of the tetracyclic ring system results in distinct challenges in preparing analogues with novel substitution patterns. Methods of modulating the hallucinogenic activity of LSD by functionalization at previously inaccessible positions are of continued interest, and efficient syntheses of the ergoline scaffold are integral toward this purpose. Here, we report novel C-C bond forming strategies for preparing the ergoline tetracyclic core, focusing on the relatively unexplored strategy of bridging the B- and D-ring systems last. Following cross-coupling to first join the A- and D-rings, we explored a variety of methods for establishing the C-ring, including intramolecular α-arylation, borrowing hydrogen alkylation, and rhodium-catalyzed C-H insertion. Our results led to a seven-step formal synthesis of LSD and the first methods for readily introducing substitution on the C-ring. These strategies are efficient for forming ergoline-like tetracyclic compounds and analogues, though they each face unique challenges associated with elaboration to ergoline natural products. Taken together, these studies provide important insights that will guide future synthetic strategies toward ergolines.
Collapse
Affiliation(s)
- Jeremy R. Tuck
- Department of Chemistry, University of California, Davis, Davis, CA 95616, USA
- Institute for Psychedelics and Neurotherapeutics, University of California, Davis, Davis, CA 95616, USA
| | - Lee E. Dunlap
- Department of Chemistry, University of California, Davis, Davis, CA 95616, USA
- Institute for Psychedelics and Neurotherapeutics, University of California, Davis, Davis, CA 95616, USA
| | - David E. Olson
- Department of Chemistry, University of California, Davis, Davis, CA 95616, USA
- Institute for Psychedelics and Neurotherapeutics, University of California, Davis, Davis, CA 95616, USA
- Department of Biochemistry & Molecular Medicine, School of Medicine, University of California, Davis, Sacramento, CA 95817, USA
- Center for Neuroscience, University of California, Davis, Davis, CA 95618, USA
| |
Collapse
|
3
|
Wei ZW, Niikura H, Wang M, Ryan KS. Identification of the Azaserine Biosynthetic Gene Cluster Implicates Hydrazine as an Intermediate to the Diazo Moiety. Org Lett 2023; 25:4061-4065. [PMID: 37235858 DOI: 10.1021/acs.orglett.3c01229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Azaserine (1) is a natural product and nonproteinogenic amino acid containing a diazo group. Here we report the biosynthetic gene cluster for 1 from Glycomyces harbinensis. We then use isotopic feeding, gene deletion, and biochemical experiments to support a pathway whereby hydrazinoacetic acid (2) and a peptidyl carrier protein-loaded serine (3) are intermediates on route to the final natural product 1.
Collapse
Affiliation(s)
- Zi-Wang Wei
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Haruka Niikura
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Menghua Wang
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Katherine S Ryan
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| |
Collapse
|
4
|
Diazo compounds: Recent applications in synthetic organic chemistry and beyond. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Okamoto Y, Kishikawa N, Hagimori M, El-Maghrabey M, Kawakami S, Kuroda N. A turn-on hydrazide oxidative decomposition-based fluorescence probe for highly selective detection of Cu2+ in tap water as well as cell imaging. Anal Chim Acta 2022; 1217:340024. [DOI: 10.1016/j.aca.2022.340024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/23/2022] [Accepted: 05/28/2022] [Indexed: 01/31/2023]
|
6
|
Zhukovsky D, Dar’in D, Bakulina O, Krasavin M. Preparation and Synthetic Applications of Five-to-Seven-Membered Cyclic α-Diazo Monocarbonyl Compounds. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27062030. [PMID: 35335391 PMCID: PMC8954351 DOI: 10.3390/molecules27062030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/16/2022] [Accepted: 03/16/2022] [Indexed: 11/16/2022]
Abstract
The reactivity of cyclic α-diazo monocarbonyl compounds differs from that of their acyclic counterparts. In this review, we summarize the current literature available on the synthesis and synthetic applications of three major classes of cyclic α-diazo monocarbonyl compounds: α-diazo ketones, α-diazo lactones and α-diazo lactams.
Collapse
Affiliation(s)
- Daniil Zhukovsky
- Research & Development Department, BratskChemSyntez LLC, PharmaSyntez Company, 5A/1 Kommunalnaya St., 665717 Bratsk, Russia;
| | - Dmitry Dar’in
- Institute of Chemistry, Saint Petersburg State University, 199034 Saint Petersburg, Russia;
- Correspondence: (D.D.); (M.K.)
| | - Olga Bakulina
- Institute of Chemistry, Saint Petersburg State University, 199034 Saint Petersburg, Russia;
| | - Mikhail Krasavin
- Institute of Chemistry, Saint Petersburg State University, 199034 Saint Petersburg, Russia;
- Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia
- Correspondence: (D.D.); (M.K.)
| |
Collapse
|
7
|
Synthesis of α-diazoesters from α-hydrazonoesters: Utilization of α-hydrazonoesters and α-diazoesters for convenient interconversion. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
8
|
Ruffell K, Smith FR, Green MT, Nicolle SM, Inman M, Lewis W, Hayes CJ, Moody CJ. Diazophosphonates: Effective Surrogates for Diazoalkanes in Pyrazole Synthesis. Chemistry 2021; 27:13703-13708. [PMID: 34425034 DOI: 10.1002/chem.202101788] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Indexed: 01/04/2023]
Abstract
Diazophosphonates, readily prepared from α-ketophosphonates by oxidation of the corresponding hydrazones in batch or in flow, are useful partners in 1,3-dipolar cycloaddition reactions to alkynes to give N-H pyrazoles, including the first intramolecular examples of such a process. The phosphoryl group imbues a number of desirable properties into the diazo 1,3-dipole. The electron-withdrawing nature of the phosphoryl stabilizes the diazo compound making it easier to handle, whilst the ability of the phosphoryl group to migrate readily in a [1,5]-sigmatropic rearrangement enables its transfer from C to N to aromatize the initial cycloadduct, and hence its facile removal from the final pyrazole product. Overall, the diazophosphonate acts as a surrogate for the much less stable diazoalkane in cycloadditions, with the phosphoryl group playing a vital, but traceless, role. The cycloaddition proceeds more readily with alkynes bearing electron-withdrawing groups, and is regiospecific with asymmetrical alkynes. The potential of diazophosphonates for use in bioorthogonal cycloadditions is demonstrated by their facile addition to strained alkynes.
Collapse
Affiliation(s)
- Katie Ruffell
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - Frances R Smith
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - Michael T Green
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - Simon M Nicolle
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - Martyn Inman
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - William Lewis
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - Christopher J Hayes
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| | - Christopher J Moody
- School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, U.K
| |
Collapse
|
9
|
Sharland JC, Wei B, Hardee DJ, Hodges TR, Gong W, Voight EA, Davies HML. Asymmetric synthesis of pharmaceutically relevant 1-aryl-2-heteroaryl- and 1,2-diheteroarylcyclopropane-1-carboxylates. Chem Sci 2021; 12:11181-11190. [PMID: 34522315 PMCID: PMC8386643 DOI: 10.1039/d1sc02474d] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/28/2021] [Indexed: 12/14/2022] Open
Abstract
This study describes general methods for the enantioselective syntheses of pharmaceutically relevant 1-aryl-2-heteroaryl- and 1,2-diheteroarylcyclopropane-1-carboxylates through dirhodium tetracarboxylate-catalysed asymmetric cyclopropanation of vinyl heterocycles with aryl- or heteroaryldiazoacetates. The reactions are highly diastereoselective and high asymmetric induction could be achieved using either (R)-pantolactone as a chiral auxiliary or chiral dirhodium tetracarboxylate catalysts. For meta- or para-substituted aryl- or heteroaryldiazoacetates the optimum catalyst was Rh2(R-p-Ph-TPCP)4. In the case of ortho-substituted aryl- or heteroaryldiazoacetates, the optimum catalyst was Rh2(R-TPPTTL)4. For a highly enantioselective reaction with the ortho-substituted substrates, 2-chloropyridine was required as an additive in the presence of either 4 Å molecular sieves or 1,1,1,3,3,3-hexafluoroisopropanol (HFIP). Under the optimized conditions, the cyclopropanation could be conducted in the presence of a variety of heterocycles, such as pyridines, pyrazines, quinolines, indoles, oxadiazoles, thiophenes and pyrazoles.
Collapse
Affiliation(s)
- Jack C Sharland
- Department of Chemistry, Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - Bo Wei
- Department of Chemistry, Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| | - David J Hardee
- Drug Discovery Science and Technology, AbbVie 1 North Waukegan Rd. North Chicago IL 60064 USA
| | - Timothy R Hodges
- Drug Discovery Science and Technology, AbbVie 1 North Waukegan Rd. North Chicago IL 60064 USA
| | - Wei Gong
- Drug Discovery Science and Technology, AbbVie 1 North Waukegan Rd. North Chicago IL 60064 USA
| | - Eric A Voight
- Drug Discovery Science and Technology, AbbVie 1 North Waukegan Rd. North Chicago IL 60064 USA
| | - Huw M L Davies
- Department of Chemistry, Emory University 1515 Dickey Drive Atlanta GA 30322 USA
| |
Collapse
|
10
|
Lu GH, Huang TC, Hsueh HC, Yang SC, Cho TW, Chou HH. Novel N-transfer reagent for converting α-amino acid derivatives to α-diazo compounds. Chem Commun (Camb) 2021; 57:4839-4842. [PMID: 33870368 DOI: 10.1039/d1cc01285a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel universal N-transfer reagent for direct and effective transformation of α-amino ketones, acetamides, and esters to the corresponding α-diazo products under mild basic conditions has been developed. This one-step synthetic approach not only allows for generation of α-substituted-α-diazo carbonyl compounds from α-amino acid derivatives but also permits preparation of α-diazo dipeptides from N-terminal dipeptides (32 examples, up to 91%).
Collapse
Affiliation(s)
- Guan-Han Lu
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan.
| | | | | | | | | | | |
Collapse
|
11
|
Kula K, Kącka-Zych A, Łapczuk-Krygier A, Wzorek Z, Nowak AK, Jasiński R. Experimental and Theoretical Mechanistic Study on the Thermal Decomposition of 3,3-diphenyl-4-(trichloromethyl)-5-nitropyrazoline. Molecules 2021; 26:molecules26051364. [PMID: 33806344 PMCID: PMC7961919 DOI: 10.3390/molecules26051364] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/24/2021] [Accepted: 02/27/2021] [Indexed: 11/16/2022] Open
Abstract
The present paper is a continuation of comprehensive study regarding to synthesis and properties of pyrazoles and their derivatives. In its framework an experimental and theoretical studies of thermal decomposition of the 3,3-diphenyl-4-(trichloromethyl)-5-nitropyrazoline were performed. It was found, that the decompositions of the mentioned pyrazoline system in the solution and at the melted state proceed via completely different molecular mechanisms. These mechanisms have been explained in the framework of the Molecular Electron Density Theory (MEDT) with the computational level of B3LYP/6-31G(d). A Bonding Evolution Theory (BET) examination of dehydrochlorination of the 3,3-diphenyl-4-(trichloromethyl)-5-nitropyrazoline permits elucidation of the molecular mechanism. It was found, that on the contrary for most known HCl extrusion processes in solution, this reaction is realised via single-step mechanism.
Collapse
Affiliation(s)
- Karolina Kula
- Department of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (K.K.); (A.K.-Z.); (A.Ł.-K.)
| | - Agnieszka Kącka-Zych
- Department of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (K.K.); (A.K.-Z.); (A.Ł.-K.)
| | - Agnieszka Łapczuk-Krygier
- Department of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (K.K.); (A.K.-Z.); (A.Ł.-K.)
| | - Zbigniew Wzorek
- Institute of Inorganic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (Z.W.); (A.K.N.)
| | - Anna K. Nowak
- Institute of Inorganic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (Z.W.); (A.K.N.)
| | - Radomir Jasiński
- Department of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; (K.K.); (A.K.-Z.); (A.Ł.-K.)
- Correspondence:
| |
Collapse
|
12
|
Liu W, Twilton J, Wei B, Lee M, Hopkins MN, Bacsa J, Stahl SS, Davies HML. Copper-Catalyzed Oxidation of Hydrazones to Diazo Compounds Using Oxygen as the Terminal Oxidant. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00264] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Wenbin Liu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta 30322, Georgia
| | - Jack Twilton
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Bo Wei
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta 30322, Georgia
| | - Maizie Lee
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta 30322, Georgia
| | - Melissa N. Hopkins
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - John Bacsa
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta 30322, Georgia
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Huw M. L. Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta 30322, Georgia
| |
Collapse
|
13
|
Fang J, Howard EM, Brewer M. A Conjugate Addition Approach to Diazo-Containing Scaffolds with β Quaternary Centers. Angew Chem Int Ed Engl 2020; 59:12827-12831. [PMID: 32365265 PMCID: PMC11157584 DOI: 10.1002/anie.202004557] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 04/28/2020] [Indexed: 01/25/2023]
Abstract
Structurally complex diazo-containing scaffolds are formed by conjugate addition to vinyl diazonium salts. The electrophile, a little studied α-diazonium-α,β-unsaturated carbonyl compound, is formed at low temperature under mild conditions by treating β-hydroxy-α-diazo carbonyls with Sc(OTf)3 . Conjugate addition occurs selectively at the 3-position of indole to give α-diazo-β-indole carbonyls, and enoxy silanes react to give 2-diazo-1,4-dicarbonyl products. These reactions result in the formation of tertiary and quaternary centers, and give products that would be otherwise difficult to form. Importantly, the diazo functional group is retained within the molecule for future manipulation. Treating an α-diazo ester indole addition product with Rh2 (OAc)4 caused a rearrangement to occur to give a 2-(1H-indol-3-yl)-2-enoate. In the case of diazo ketone compounds, this shift occurred spontaneously on prolonged exposure to the Lewis acidic reaction conditions.
Collapse
Affiliation(s)
- Jian Fang
- Department of Chemistry, University of Vermont, Innovation Hall, 82 University Place, Burlington, VT, 05495, USA
| | - Evan M Howard
- Department of Chemistry, University of Vermont, Innovation Hall, 82 University Place, Burlington, VT, 05495, USA
| | - Matthias Brewer
- Department of Chemistry, University of Vermont, Innovation Hall, 82 University Place, Burlington, VT, 05495, USA
| |
Collapse
|
14
|
Gan L, Wei L, Wan J. Catalyst‐Free Synthesis of α‐Diazoketones in Water by Microwave Promoted Enaminone C=C Double Bond Cleavage. ChemistrySelect 2020. [DOI: 10.1002/slct.202002247] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lu Gan
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
- School of ScienceNanchang Institute of Technology Nanchang 330029 P. R. China
| | - Li Wei
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
| | - Jie‐Ping Wan
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
| |
Collapse
|
15
|
Fang J, Howard EM, Brewer M. A Conjugate Addition Approach to Diazo‐Containing Scaffolds with β Quaternary Centers. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004557] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Jian Fang
- Department of Chemistry University of Vermont Innovation Hall, 82 University Place Burlington VT 05495 USA
| | - Evan M. Howard
- Department of Chemistry University of Vermont Innovation Hall, 82 University Place Burlington VT 05495 USA
| | - Matthias Brewer
- Department of Chemistry University of Vermont Innovation Hall, 82 University Place Burlington VT 05495 USA
| |
Collapse
|
16
|
Liu C, Chen Z, Yan H, Xi S, Yam KM, Gao J, Du Y, Li J, Zhao X, Xie K, Xu H, Li X, Leng K, Pennycook SJ, Liu B, Zhang C, Koh MJ, Loh KP. Expedient synthesis of E-hydrazone esters and 1 H-indazole scaffolds through heterogeneous single-atom platinum catalysis. SCIENCE ADVANCES 2019; 5:eaay1537. [PMID: 31840074 PMCID: PMC6897547 DOI: 10.1126/sciadv.aay1537] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 10/21/2019] [Indexed: 05/24/2023]
Abstract
Unprotected E-hydrazone esters are prized building blocks for the preparation of 1H-indazoles and countless other N-containing biologically active molecules. Despite previous advances, efficient and stereoselective synthesis of these compounds remains nontrivial. Here, we show that Pt single atoms anchored on defect-rich CeO2 nanorods (Pt1/CeO2), in conjunction with the alcoholysis of ammonia borane, promotes exceptionally E-selective hydrogenation of α-diazoesters to afford a wide assortment of N-H hydrazone esters with an overall turnover frequency of up to 566 hours-1 upon reaction completion. The α-diazoester substrates could be generated in situ from readily available carboxylic esters in one-pot hydrogenation reaction. Utility is demonstrated through concise, scalable synthesis of 1H-indazole-derived pharmaceuticals and their 15N-labeled analogs. The present protocol highlights a key mechanistic nuance wherein simultaneous coordination of a Pt site with the diazo N═N and ester carbonyl motifs plays a central role in controlling stereoselectivity, which is supported by density functional theory calculations.
Collapse
Affiliation(s)
- Cuibo Liu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Zhongxin Chen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Huan Yan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Kah Meng Yam
- Department of Physics, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jiajian Gao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Yonghua Du
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Jing Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Xiaoxu Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Keyu Xie
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, Northwestern Polytechnical University, Xi’an 710072, China
| | - Haisen Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Xing Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Kai Leng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Stephen J. Pennycook
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Bin Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Chun Zhang
- Department of Physics, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Ming Joo Koh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Kian Ping Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| |
Collapse
|
17
|
Green SP, Wheelhouse KM, Payne AD, Hallett JP, Miller PW, Bull JA. Thermal Stability and Explosive Hazard Assessment of Diazo Compounds and Diazo Transfer Reagents. Org Process Res Dev 2019; 24:67-84. [PMID: 31983869 PMCID: PMC6972035 DOI: 10.1021/acs.oprd.9b00422] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 11/29/2022]
Abstract
Despite their wide use in academia as metal-carbene precursors, diazo compounds are often avoided in industry owing to concerns over their instability, exothermic decomposition, and potential explosive behavior. The stability of sulfonyl azides and other diazo transfer reagents is relatively well understood, but there is little reliable data available for diazo compounds. This work first collates available sensitivity and thermal analysis data for diazo transfer reagents and diazo compounds to act as an accessible reference resource. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and accelerating rate calorimetry (ARC) data for the model donor/acceptor diazo compound ethyl (phenyl)diazoacetate are presented. We also present a rigorous DSC dataset with 43 other diazo compounds, enabling direct comparison to other energetic materials to provide a clear reference work to the academic and industrial chemistry communities. Interestingly, there is a wide range of onset temperatures (T onset) for this series of compounds, which varied between 75 and 160 °C. The thermal stability variation depends on the electronic effect of substituents and the amount of charge delocalization. A statistical model is demonstrated to predict the thermal stability of differently substituted phenyl diazoacetates. A maximum recommended process temperature (T D24) to avoid decomposition is estimated for selected diazo compounds. The average enthalpy of decomposition (ΔH D) for diazo compounds without other energetic functional groups is -102 kJ mol-1. Several diazo transfer reagents are analyzed using the same DSC protocol and found to have higher thermal stability, which is in general agreement with the reported values. For sulfonyl azide reagents, an average ΔH D of -201 kJ mol-1 is observed. High-quality thermal data from ARC experiments shows the initiation of decomposition for ethyl (phenyl)diazoacetate to be 60 °C, compared to that of 100 °C for the common diazo transfer reagent p-acetamidobenzenesulfonyl azide (p-ABSA). The Yoshida correlation is applied to DSC data for each diazo compound to provide an indication of both their impact sensitivity (IS) and explosivity. As a neat substance, none of the diazo compounds tested are predicted to be explosive, but many (particularly donor/acceptor diazo compounds) are predicted to be impact-sensitive. It is therefore recommended that manipulation, agitation, and other processing of neat diazo compounds are conducted with due care to avoid impacts, particularly in large quantities. The full dataset is presented to inform chemists of the nature and magnitude of hazards when using diazo compounds and diazo transfer reagents. Given the demonstrated potential for rapid heat generation and gas evolution, adequate temperature control and cautious addition of reagents that begin a reaction are strongly recommended when conducting reactions with diazo compounds.
Collapse
Affiliation(s)
- Sebastian P Green
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 80 Wood Lane, London W12 0BZ, U.K.,Department of Chemical Engineering, Imperial College London, South Kensington Campus, Exhibition Road, London SW7 2AZ, U.K
| | - Katherine M Wheelhouse
- API Chemistry, Product Development & Supply and Process Safety, Pilot Plant Operations, GlaxoSmithKline, GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Andrew D Payne
- API Chemistry, Product Development & Supply and Process Safety, Pilot Plant Operations, GlaxoSmithKline, GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Jason P Hallett
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, Exhibition Road, London SW7 2AZ, U.K
| | - Philip W Miller
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 80 Wood Lane, London W12 0BZ, U.K
| | - James A Bull
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 80 Wood Lane, London W12 0BZ, U.K
| |
Collapse
|
18
|
Allouche EMD, Charette AB. Non-stabilized diazoalkane synthesis via the oxidation of free hydrazones by iodosylbenzene and application in in situ MIRC cyclopropanation. Chem Sci 2019; 10:3802-3806. [PMID: 31015921 PMCID: PMC6457201 DOI: 10.1039/c8sc05558k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 02/18/2019] [Indexed: 12/15/2022] Open
Abstract
Electron-rich alkyl diazo compounds are powerful reagents in organic synthesis, but the risks associated with their toxicity and instability often limit their uses. Herein we describe an efficient, easy-to-handle and safe batch protocol for the in situ generation and cyclopropanation of these highly reactive non-stabilized diazoalkanes through the oxidation of free hydrazones using iodosylbenzene. Numerous substituted cyclopropanes have been synthesized using this methodology, including various gem-dimethylcyclopropanes of particular interest in medicinal chemistry.
Collapse
Affiliation(s)
- Emmanuelle M D Allouche
- Department of Chemistry , Université de Montréal , P. O. Box 6128 Station Downtown , Montreal , Quebec , H3C 3J7 Canada .
| | - André B Charette
- Department of Chemistry , Université de Montréal , P. O. Box 6128 Station Downtown , Montreal , Quebec , H3C 3J7 Canada .
| |
Collapse
|
19
|
Huo H, A R, Gong Y. Formal [3 + 3] Cycloaddition Reactions between Electron-Deficient Cyclopropenes and Hydrazones: A Route to Alkyl 1,4,5,6-Tetrahydropyridazine-3-carboxylates. J Org Chem 2019; 84:2093-2101. [DOI: 10.1021/acs.joc.8b03105] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Hengrui Huo
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Runa A
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
| |
Collapse
|
20
|
Bortolamiol E, Chiminazzo A, Sperni L, Borsato G, Fabris F, Scarso A. Functional bisphosphonate synthesis for the development of new anti-resorption bone drug candidates. NEW J CHEM 2019. [DOI: 10.1039/c9nj02504a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Widening the bisphosphonate toolbox: new bisphosphonate scaffolds enable new functionalizations.
Collapse
Affiliation(s)
- Enrica Bortolamiol
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Andrea Chiminazzo
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Laura Sperni
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Giuseppe Borsato
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Fabrizio Fabris
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| | - Alessandro Scarso
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari di Venezia
- Mestre
- Italy
| |
Collapse
|
21
|
Jiménez-Andreu MM, Sayago FJ, Cativiela C. An Improved Synthesis of the Antibiotic Dehydrophos. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- M. Mercedes Jiménez-Andreu
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Francisco J. Sayago
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Carlos Cativiela
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| |
Collapse
|
22
|
Muthukumar A, Sangeetha S, Sekar G. Recent developments in functionalization of acyclic α-keto amides. Org Biomol Chem 2018; 16:7068-7083. [DOI: 10.1039/c8ob01423j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review describes the synthetic utility of α-keto amides to synthesize various important molecules via mono, dual and triple functionalization reactions.
Collapse
Affiliation(s)
- Alagesan Muthukumar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600 036
- India
| | - Subramani Sangeetha
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600 036
- India
| | - Govindasamy Sekar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600 036
- India
| |
Collapse
|
23
|
Nicolle SM, Nortcliffe A, Bartrum HE, Lewis W, Hayes CJ, Moody CJ. C−H Insertion as a Key Step to Spiro-Oxetanes, Scaffolds for Drug Discovery. Chemistry 2017; 23:13623-13627. [DOI: 10.1002/chem.201703746] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Simon M. Nicolle
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Andrew Nortcliffe
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Hannah E. Bartrum
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - William Lewis
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Christopher J. Hayes
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Christopher J. Moody
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| |
Collapse
|
24
|
Recent progress in insertion and cyclopropanation reactions of metal carbenoids from α-diazocarbonyl compounds. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3000-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
25
|
Liu P, Zhu C, Xu G, Sun J. Iron-catalyzed intermolecular cycloaddition of diazo surrogates with hexahydro-1,3,5-triazines. Org Biomol Chem 2017; 15:7743-7746. [DOI: 10.1039/c7ob02115a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An iron-catalyzed formal [4 + 1]-cycloaddition of diazo compounds with hexahydro-1,3,5-triazines has been achieved.
Collapse
Affiliation(s)
- Pei Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- and the School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Chenghao Zhu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- and the School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- and the School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- and the School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- P. R. China
| |
Collapse
|
26
|
Yang P, Moloney MG. Surface modification using crosslinking of diamine and a bis(diarylcarbene): synthesis, characterization, and antibacterial activity via binding hydrogen peroxide. RSC Adv 2017. [DOI: 10.1039/c7ra05258h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Modification of polymer beads with a functionalized bis(arylcarbene) provides access to materials with biocidal properties.
Collapse
Affiliation(s)
- Pengfei Yang
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- UK
- School of Chemistry and Pharmaceutical Engineering
| | - Mark G. Moloney
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- UK
| |
Collapse
|
27
|
Marinozzi M, Pertusati F, Serpi M. λ5-Phosphorus-Containing α-Diazo Compounds: A Valuable Tool for Accessing Phosphorus-Functionalized Molecules. Chem Rev 2016; 116:13991-14055. [DOI: 10.1021/acs.chemrev.6b00373] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maura Marinozzi
- Dipartimento
di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Fabrizio Pertusati
- School
of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, United Kingdom
| | - Michaela Serpi
- School
of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, United Kingdom
| |
Collapse
|
28
|
Dydio P, Key HM, Nazarenko A, Rha JYE, Seyedkazemi V, Clark DS, Hartwig JF. An artificial metalloenzyme with the kinetics of native enzymes. Science 2016; 354:102-106. [DOI: 10.1126/science.aah4427] [Citation(s) in RCA: 242] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 09/12/2016] [Indexed: 01/04/2023]
|
29
|
Zhang JQ, Qi ZH, Yin SJ, Li HY, Wang Y, Wang XW. Brønsted or Lewis Acid Initiated Multicomponent Cascade Reaction: Diastereoselective Synthesis of Imidazolidinyl Spirooxindole Derivatives. ChemCatChem 2016. [DOI: 10.1002/cctc.201600560] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jun-Qi Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Zheng-Hang Qi
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Shao-Jie Yin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Hai-Yan Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Yong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Xing-Wang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| |
Collapse
|
30
|
Squitieri RA, Shearn-Nance GP, Hein JE, Shaw JT. Synthesis of Esters by in Situ Formation and Trapping of Diazoalkanes. J Org Chem 2016; 81:5278-84. [DOI: 10.1021/acs.joc.6b00408] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard A. Squitieri
- Department
of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Galen P. Shearn-Nance
- Department
of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Jason E. Hein
- Department
of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jared T. Shaw
- Department
of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| |
Collapse
|
31
|
Stereoselective Synthesis of Tetrahydroindolizines through the Catalytic Formation of Pyridinium Ylides from Diazo Compounds. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
32
|
Day J, McKeever-Abbas B, Dowden J. Stereoselective Synthesis of Tetrahydroindolizines through the Catalytic Formation of Pyridinium Ylides from Diazo Compounds. Angew Chem Int Ed Engl 2016; 55:5809-13. [DOI: 10.1002/anie.201511047] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/15/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Jonathan Day
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD UK
| | - Ben McKeever-Abbas
- Pharmaceutical Development; AstraZeneca; Silk Road Business Park Macclesfield UK
| | - James Dowden
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD UK
| |
Collapse
|
33
|
Liu C, Yang Z, Guo S, Zeng Y, Zhu N, Li X, Fang Z, Guo K. Copper–TEMPO-catalyzed synthesis of α-ketoamides via tandem sp3C–H aerobic oxidation and amination of phenethyl alcohol derivatives. Org Biomol Chem 2016; 14:8570-5. [DOI: 10.1039/c6ob01387b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first synthesis of α-ketoamides from phenethyl alcohol derivatives, simple and readily available substrates, was achieved.
Collapse
Affiliation(s)
- Chengkou Liu
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
| | - Zhao Yang
- College of Engineering China Pharmaceutical University
- NanJing
- China
| | - Shiyu Guo
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
| | - Yu Zeng
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
| | - Ning Zhu
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
| | - Xin Li
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 30 Puzhu South Road
- Nanjing
- China
- State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech
- University
| |
Collapse
|
34
|
Yang P, Moloney MG. Surface modification of polymers with bis(arylcarbene)s from bis(aryldiazomethane)s: preparation, dyeing and characterization. RSC Adv 2016. [DOI: 10.1039/c6ra24392d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Modification of polymer beads by a series of bis(arylcarbene) provides materials with different surface chemical characteristics, and a subsequent dyeing process generates colored polymers with a variety of surface functional groups.
Collapse
Affiliation(s)
- Pengfei Yang
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- UK
- School of Chemistry and Pharmaceutical Engineering
| | - Mark G. Moloney
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- UK
| |
Collapse
|
35
|
Jasiński R, Mróz K, Kącka A. Experimental and Theoretical DFT Study on Synthesis of Sterically Crowded 2,3,3,(4)5-Tetrasubstituted-4-nitroisoxazolidines via 1,3-Dipolar Cycloaddition Reactions Between Ketonitrones and Conjugated Nitroalkenes. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2442] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Radomir Jasiński
- Institute of Organic Chemistry and Technology; Cracow University of Technology; ul. Warszawska 24 31-155 Cracow Poland
| | - Kamila Mróz
- Institute of Organic Chemistry and Technology; Cracow University of Technology; ul. Warszawska 24 31-155 Cracow Poland
| | - Agnieszka Kącka
- Institute of Organic Chemistry and Technology; Cracow University of Technology; ul. Warszawska 24 31-155 Cracow Poland
| |
Collapse
|
36
|
Nicolle SM, Hayes CJ, Moody CJ. Alkyl halide-free heteroatom alkylation and epoxidation facilitated by a recyclable polymer-supported oxidant for the in-flow preparation of diazo compounds. Chemistry 2015; 21:4576-9. [PMID: 25675852 DOI: 10.1002/chem.201500118] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Indexed: 11/09/2022]
Abstract
Highly reactive metal carbenes, generated from simple ketones via diazo compounds, including diazo-amides and -phosphonates, using a recyclable reagent in-flow, are transient but versatile electrophiles for heteroatom alkylation reactions and for epoxide formation. The method produces no organic waste, with the only by-products being water, KI and nitrogen, without the attendant hazards of isolation of intermediate diazo compounds.
Collapse
Affiliation(s)
- Simon M Nicolle
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (UK)
| | | | | |
Collapse
|
37
|
Shu WM, Ma JR, Zheng KL, Sun HY, Wang M, Yang Y, Wu AX. One-pot synthesis of polyfunctional pyrazoles: an easy access to α-diazoketones from arylglyoxal monohydrates and tosylhydrazine. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.10.044] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
38
|
Pramanik MMD, Chaturvedi AK, Rastogi N. Substituent controlled reactivity switch: selective synthesis of α-diazoalkylphosphonates or vinylphosphonates via nucleophilic substitution of alkyl bromides with Bestmann–Ohira reagent. Chem Commun (Camb) 2014; 50:12896-8. [DOI: 10.1039/c4cc05684a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a substituent controlled nucleophilic displacement of alkyl bromides with Bestmann–Ohira reagent yielding either dimethyl diazoalkylphosphonates or (E)-vinylphosphonates.
Collapse
Affiliation(s)
- Mukund M. D. Pramanik
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
- Academy of Scientific and Innovative Research
- New Delhi 110001, India
| | - Atul Kumar Chaturvedi
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
- Academy of Scientific and Innovative Research
- New Delhi 110001, India
| | - Namrata Rastogi
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031, India
- Academy of Scientific and Innovative Research
- New Delhi 110001, India
| |
Collapse
|