1
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QIN CJ, HOU HL, DING MR, QI YK, TIAN GZ, ZOU XP, FU JJ, HU J, YIN J. Chemical synthesis of a synthetically useful L-galactosaminuronic acid building block. Chin J Nat Med 2022; 20:387-392. [DOI: 10.1016/s1875-5364(22)60149-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Indexed: 11/03/2022]
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2
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Mukherjee G, Satpathy JK, Bagha UK, Mubarak MQE, Sastri CV, de Visser SP. Inspiration from Nature: Influence of Engineered Ligand Scaffolds and Auxiliary Factors on the Reactivity of Biomimetic Oxidants. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01993] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Gourab Mukherjee
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India
| | - Jagnyesh K. Satpathy
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India
| | - Umesh K. Bagha
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India
| | - M. Qadri E. Mubarak
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
- Fakulti Sains dan Teknologi, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan Malaysia
| | - Chivukula V. Sastri
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India
| | - Sam P. de Visser
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
- Department of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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3
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Tian W, Li M, Yang S, Zhang H, Liu H, Xiao X. Copper Corrole as an Efficient Catalyst for Esterification of Allylic sp 3-C—H Bonds with Carboxylic Acids. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202101023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Manna K, Begam HM, Samanta K, Jana R. Overcoming the Deallylation Problem: Palladium(II)-Catalyzed Chemo-, Regio-, and Stereoselective Allylic Oxidation of Aryl Allyl Ether, Amine, and Amino Acids. Org Lett 2020; 22:7443-7449. [PMID: 32955263 DOI: 10.1021/acs.orglett.0c02465] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report herein a Pd(II)/bis-sulfoxide-catalyzed intramolecular allylic C-H acetoxylation of aryl allyl ether, amine, and amino acids with the retention of a labile allyl moiety. Mechanistically, the reaction proceeds through a distinct double-bond isomerization from the allylic to the vinylic position followed by intramolecular carboxypalladation and the β-hydride elimination pathway. For the first time, C-H oxidation of N-allyl-protected amino acids to furnish five-membered heterocycles through 1,3-syn-addition is established with excellent diastereoselectivity.
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Affiliation(s)
- Kartic Manna
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Hasina Mamataj Begam
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India
| | - Krishanu Samanta
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Ranjan Jana
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
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5
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Thiess T, Ernst M, Kupfer T, Braunschweig H. Facile Access to Substituted 1,4-Diaza-2,3-Diborinines. Chemistry 2020; 26:2967-2972. [PMID: 31944442 PMCID: PMC7078994 DOI: 10.1002/chem.201905356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Indexed: 11/27/2022]
Abstract
Several bis(dimethylamino)-substituted 1,4-diaza-2,3-diborinines (DADBs) were synthesized with variable substituents at the backbone nitrogen atoms. By reaction with HCl or BX3 (X=Br, I), these species were successfully converted into their synthetically more useful halide congeners. The high versatility of the generated B-X bonds in further functionalization reactions at the boron centers was demonstrated by means of salt elimination (MeLi) and commutation (NMe2 DADBs) reactions, thus making the DADB system a general structural motif in diborane(4) chemistry. A total of 18 DADB derivatives were characterized in the solid state by X-ray diffraction, revealing a strong dependence of the heterocyclic bonding parameters from the exocyclic substitution pattern at boron. According to our experiments towards the realization of a Dipp-substituted, sterically encumbered DADB, the mechanism of DADB formation proceeds via a transient four-membered azadiboretidine intermediate that subsequently undergoes ring expansion to afford the six-membered DADB heterocycle.
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Affiliation(s)
- Torsten Thiess
- Institute of Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Moritz Ernst
- Institute of Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Thomas Kupfer
- Institute of Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute of Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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6
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Zhang Y, Shen S, Fang H, Xu T. Total Synthesis of Galanthamine and Lycoramine Featuring an Early-Stage C-C and a Late-Stage Dehydrogenation via C-H Activation. Org Lett 2020; 22:1244-1248. [PMID: 31904968 DOI: 10.1021/acs.orglett.9b04337] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Herein, we report a novel strategy toward galanthamine and lycoramine. The concise synthesis was enabled by a Rh-catalyzed gram-scale C-C activation for the tetracyclic carbon framework and a regioselective Pd-catalyzed C-H activation for double-bond introduction. An aqueous-phase Beckmann rearrangement was performed for nitrogen atom insertion. Galanthamine and lycoramine were completed in 11 and 10 steps, respectively.
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Affiliation(s)
- Yuna Zhang
- Key Laboratory of Marine Drugs, Ministry of Education; School of Medicine and Pharmacy, Laboratory for Marine Drugs and Bioproducts & Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology , Ocean University of China , Qingdao 266003 , China
| | - Shuna Shen
- Key Laboratory of Marine Drugs, Ministry of Education; School of Medicine and Pharmacy, Laboratory for Marine Drugs and Bioproducts & Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology , Ocean University of China , Qingdao 266003 , China
| | - Hua Fang
- Technical Innovation Center for Utilization of Marine Biological Resources , Third Institute of Oceanography, Ministry of Natural Resources , Xiamen 361005 , China
| | - Tao Xu
- Key Laboratory of Marine Drugs, Ministry of Education; School of Medicine and Pharmacy, Laboratory for Marine Drugs and Bioproducts & Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology , Ocean University of China , Qingdao 266003 , China
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7
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Kazerouni AM, Nelson TAF, Chen SW, Sharp KR, Blakey SB. Regioselective Cp*Ir(III)-Catalyzed Allylic C–H Sulfamidation of Allylbenzene Derivatives. J Org Chem 2019; 84:13179-13185. [DOI: 10.1021/acs.joc.9b01816] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amaan M. Kazerouni
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Taylor A. F. Nelson
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Steven W. Chen
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Kimberly R. Sharp
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Simon B. Blakey
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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8
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Kozack CV, Sowin JA, Jaworski JN, Iosub AV, Stahl SS. Aerobic Acyloxylation of Allylic C-H Bonds Initiated by a Pd 0 Precatalyst with 4,5-Diazafluoren-9-one as an Ancillary Ligand. CHEMSUSCHEM 2019; 12:3003-3007. [PMID: 31107593 PMCID: PMC7641472 DOI: 10.1002/cssc.201900727] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/23/2019] [Indexed: 06/09/2023]
Abstract
Palladium-catalyzed allylic C-H oxidation has been widely studied, but most precedents use acetic acid as the coupling partner. In this study, a method compatible with diverse carboxylic acid partners has been developed. Use of a Pd0 precatalyst under aerobic reaction conditions leads to oxidation of Pd0 by O2 in the presence of the desired carboxylic acid to generate a PdII dicarboxylate that promotes acyloxylation of the allylic C-H bond. Good-to-excellent yields are obtained with a roughly 1:1 ratio of the alkene and carboxylic acid reagents. Optimized reaction conditions employ 4,5-diazafluoren-9-one (DAF) as a ligand, in combination with a quinone/iron phthalocyanine cocatalyst system to support aerobic catalytic turnover.
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Affiliation(s)
- Caitlin V Kozack
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jennifer A Sowin
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jonathan N Jaworski
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Andrei V Iosub
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
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9
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Wang R, Luan Y, Ye M. Transition Metal–Catalyzed Allylic C(sp
3
)–H Functionalization
via η
3
‐Allylmetal Intermediate. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900140] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ronghua Wang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Yuxin Luan
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
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10
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Xiong MF, Ali A, Akram W, Zhang H, Si LP, Liu HY. Copper porphyrin as efficient catalysts for esterification of allyl sp3 C H bond with carboxylic acid. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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11
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Abstract
The atomistic change of C( sp3)-H to C( sp3)-O can have a profound impact on the physical and biological properties of small molecules. Traditionally, chemical synthesis has relied on pre-existing functionality to install new functionality, and directed approaches to C-H oxidation are an extension of this logic. The impact of developing undirected C-H oxidation reactions with controlled site-selectivity is that scientists gain the ability to diversify complex structures at sites remote from existing functionality, without having to carry out individual de novo syntheses. This Perspective offers a historical view of why, as recently as 2007, it was thought that the differences between aliphatic C-H bonds of the same bond type (for example, 2° aliphatic) were not large enough to distinguish them preparatively with small-molecule catalysis in the absence of directing groups or molecular recognition elements. We give an account of the discovery of Fe(PDP)-catalyzed non-directed aliphatic C-H hydroxylations and how the electronic, steric, and stereoelectronic rules for predicting site-selectivity that emerged have affected a shift in how the chemical community views the reactivity among these bonds. The discovery that site-selectivity could be altered by tuning the catalyst [i.e., Fe(CF3-PDP)] with no changes to the substrate or reaction now gives scientists the ability to exert control on the site of oxidation on a range of functionally and topologically diverse compounds. Collectively, these findings have made possible the emerging area of late-stage C-H functionalizations for streamlining synthesis and derivatizing complex molecules.
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Affiliation(s)
- M Christina White
- Roger Adams Laboratory, Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Jinpeng Zhao
- Roger Adams Laboratory, Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
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12
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Lu B, Zhu F, Wang D, Sun H, Shen Q. Iron-catalyzed esterification of allylic sp 3 C–H bonds with carboxylic acids: Facile access to allylic esters. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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13
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Litman ZC, Sharma A, Hartwig JF. Oxidation of Hindered Allylic C-H Bonds with Applications to the Functionalization of Complex Molecules. ACS Catal 2017; 7:1998-2001. [PMID: 29910970 DOI: 10.1021/acscatal.6b03648] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We report the palladium-catalyzed oxidation of hindered alkenes to form linear allylic esters. The combination of palladium(II) benzoate, 4,5-diazafluoren-9-one, and benzoquinone catalyzes the mild oxidation of terminal alkenes with tert-butyl benzoyl peroxide as an oxidant in the presence of diverse functional groups. Selective oxidation of terminal alkenes in the presence of trisubstituted and disubstituted alkenes has been achieved, and the ability to conduct the reaction on a gram scale has been demonstrated. The mild conditions and high tolerance for auxiliary functionality make this method suitable for the synthesis and derivatization of complex molecules.
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Affiliation(s)
- Zachary C. Litman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Ankit Sharma
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John F. Hartwig
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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14
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Ghosh AK, Brindisi M. Achmatowicz Reaction and its Application in the Syntheses of Bioactive Molecules. RSC Adv 2016; 6:111564-111598. [PMID: 28944049 PMCID: PMC5603243 DOI: 10.1039/c6ra22611f] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Substituted pyranones and tetrahydropyrans are structural subunits of many bioactive natural products. Considerable efforts are devoted toward the chemical synthesis of these natural products due to their therapeutic potential as well as low natural abundance. These embedded pyranones and tetrahydropyran structural motifs have been the subject of synthetic interest over the years. While there are methods available for the syntheses of these subunits, there are issues related to regio and stereochemical outcomes, as well as versatility and compatibility of reaction conditions and functional group tolerance. The Achmatowicz reaction, an oxidative ring enlargement of furyl alcohol, was developed in the 1970s. The reaction provides a unique entry to a variety of pyranone derivatives from functionalized furanyl alcohols. These pyranones provide convenient access to substituted tetrahydropyran derivatives. This review outlines general approaches to the synthesis of tetrahydropyrans, covering general mechanistic aspects of the Achmatowicz reaction or rearrangement with an overview of the reagents utilized for the Achmatowicz reaction. The review then focuses on the synthesis of functionalized tetrahydropyrans and pyranones and their applications in the synthesis of natural products and medicinal agents.
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Affiliation(s)
- Arun K. Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Margherita Brindisi
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
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15
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Liu XW, Shi JL, Wei JB, Yang C, Yan JX, Peng K, Dai L, Li CG, Wang BQ, Shi ZJ. Diversified syntheses of multifunctionalized thiazole derivatives via regioselective and programmed C-H activation. Chem Commun (Camb) 2016; 51:4599-602. [PMID: 25687354 DOI: 10.1039/c4cc10419f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The sequential construction of diversified multifunctionalized thiazole derivatives through Pd-catalyzed regioselective C-H alkenylation has been accomplished. This versatile approach provides the diversified thiazole derivatives featuring orthogonal substitution patterns at the C-2, C-4 and C-5 positions from mono-substituted (2- or 4-substituted) thiazole derivatives or even more challenging simple thiazole.
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Affiliation(s)
- Xiang-Wei Liu
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.
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16
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Wang HY, Yang K, Yin D, Liu C, Glazier DA, Tang W. Chiral Catalyst-Directed Dynamic Kinetic Diastereoselective Acylation of Lactols for De Novo Synthesis of Carbohydrate. Org Lett 2015; 17:5272-5. [DOI: 10.1021/acs.orglett.5b02641] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hao-Yuan Wang
- School
of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Ka Yang
- School
of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Dan Yin
- School
of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Can Liu
- School
of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Daniel A. Glazier
- Department
of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Weiping Tang
- School
of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
- Department
of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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17
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Song W, Zhao Y, Lynch JC, Kim H, Tang W. Divergent de novo synthesis of all eight stereoisomers of 2,3,6-trideoxyhexopyranosides and their oligomers. Chem Commun (Camb) 2015; 51:17475-8. [PMID: 26477956 DOI: 10.1039/c5cc07787g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
All eight possible stereoisomers of 2,3,6-trideoxyhexopyranosides are prepared systematically from furan derivatives by a sequence of Achmatowicz rearrangement, Pd-catalysed glycosidation, and chiral catalyst-controlled tandem reductions. This sequence provides access to all possible stereoisomers of naturally occurring rhodinopyranosides, amicetopyranosides, disaccharide narbosine B, and other unnatural oligomeric 2,3,6-trideoxyhexopyranosides. It comprises a unique and systematic strategy for the de novo synthesis of deoxysugars.
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Affiliation(s)
- Wangze Song
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705-2222, USA.
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18
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Sipos G, Drinkel EE, Dorta R. The emergence of sulfoxides as efficient ligands in transition metal catalysis. Chem Soc Rev 2015; 44:3834-60. [PMID: 25954773 DOI: 10.1039/c4cs00524d] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Sulfoxides are capable of forming stable complexes with transition metals and there have been many comprehensive studies into their binding properties. However, the use of sulfoxides, particularly chiral sulfoxides, as ligands in transition metal catalysis is rather less well developed. This review aims to describe these catalytic studies and covers new developments that are showing very promising results and that have led to a renewed interest in this field.
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Affiliation(s)
- Gellért Sipos
- School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, 6009, Crawley, Australia.
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19
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Palladium-catalyzed oxidative ortho-acylation of 2-arylbenzoxazoles and 2-arylbenzothiazoles with toluene derivatives. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.01.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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20
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Yang W, Chen H, Li J, Li C, Wu W, Jiang H. Palladium-catalyzed aerobic oxidative double allylic C–H oxygenation of alkenes: a novel and straightforward route to α,β-unsaturated esters. Chem Commun (Camb) 2015; 51:9575-8. [DOI: 10.1039/c5cc02277k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We reported a strategically distinct approach to synthesize α,β-unsaturated esters through palladium-catalyzed aerobic oxidative double allylic C–H oxygenation of alkenes.
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Affiliation(s)
- Wanfei Yang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huoji Chen
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Jianxiao Li
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Chunsheng Li
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
- State Key Laboratory of Applied Organic Chemistry
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21
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Frihed TG, Pedersen CM, Bols M. Synthesis of All EightL-Glycopyranosyl Donors Using CH Activation. Angew Chem Int Ed Engl 2014; 53:13889-93. [DOI: 10.1002/anie.201408209] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Indexed: 12/31/2022]
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22
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Frihed TG, Pedersen CM, Bols M. Synthesis of All EightL-Glycopyranosyl Donors Using CH Activation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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23
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White DE, Tadross PM, Lu Z, Jacobsen EN. A broadly applicable and practical oligomeric (salen) Co catalyst for enantioselective epoxide ring-opening reactions. Tetrahedron 2014; 70:4165-4180. [PMID: 25045188 PMCID: PMC4096935 DOI: 10.1016/j.tet.2014.03.043] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The (salen) Co catalyst (4a) can be prepared as a mixture of cyclic oligomers in a short, chromatography-free synthesis from inexpensive, commercially available precursors. This catalyst displays remarkable enhancements in reactivity and enantioselectivity relative to monomeric and other multimeric (salen) Co catalysts in a wide variety of enantioselective epoxide ring-opening reactions. The application of catalyst 4a is illustrated in the kinetic resolution of terminal epoxides by nucleophilic ring-opening with water, phenols, and primary alcohols; the desymmetrization of meso epoxides by addition of water and carbamates; and the desymmetrization of oxetanes by intramolecular ring opening with alcohols and phenols. The favorable solubility properties of complex 4a under the catalytic conditions facilitated mechanistic studies, allowing elucidation of the basis for the beneficial effect of oligomerization. Finally, a catalyst selection guide is provided to delineate the specific advantages of oligomeric catalyst 4a relative to (salen) Co monomer 1 for each reaction class.
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Affiliation(s)
- David E White
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Pamela M Tadross
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Zhe Lu
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
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24
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Liron F, Oble J, Lorion MM, Poli G. Direct Allylic Functionalization Through Pd-Catalyzed C-H Activation. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402049] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Rajabi J, Lorion MM, Ly VL, Liron F, Oble J, Prestat G, Poli G. Dormant versus Evolving Aminopalladated Intermediates: Toward a Unified Mechanistic Scenario in PdII-Catalyzed Aminations. Chemistry 2014; 20:1539-46. [PMID: 24403244 DOI: 10.1002/chem.201302744] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 10/09/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Jamshid Rajabi
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7201, Institut Parisien de Chimie Moléculaire, 75005 Paris (France), FR2769 Institut de Chimie Moléculaire; CNRS, UMR 7201, Institut Parisien de Chimie Moléculaire, 75005 Paris (France)
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26
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Covell DJ, White MC. A C-H oxidation approach for streamlining synthesis of chiral polyoxygenated motifs. Tetrahedron 2013; 69:7771-7778. [PMID: 25013239 PMCID: PMC4084758 DOI: 10.1016/j.tet.2013.05.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Chiral oxygenated molecules are pervasive in natural products and medicinal agents; however, their chemical syntheses often necessitate numerous, wasteful steps involving functional group and oxidation state manipulations. Herein a strategy for synthesizing a readily diversifiable class of chiral building blocks, allylic alcohols, through sequential asymmetric C-H activation/resolution is evaluated against the state-of-the-art. The C-H oxidation routes' capacity to strategically introduce oxygen into a sequence and thereby minimize non-productive manipulations is demonstrated to effect significant decreases in overall step-count and increases in yield and synthetic flexibility.
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Affiliation(s)
- Dustin J. Covell
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine Philadelphia, PA 19104, USA
| | - M. Christina White
- Department of Chemistry, Roger Adams Laboratory, University of Illinois Urbana, IL 61801, USA
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27
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Strambeanu II, White MC. Catalyst-controlled C-O versus C-N allylic functionalization of terminal olefins. J Am Chem Soc 2013; 135:12032-7. [PMID: 23855956 PMCID: PMC4124944 DOI: 10.1021/ja405394v] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The divergent synthesis of syn-1,2-aminoalcohol or syn-1,2-diamine precursors from a common terminal olefin has been accomplished using a combination of palladium(II) catalysis with Lewis acid cocatalysis. Palladium(II)/bis-sulfoxide catalysis with a silver triflate cocatalyst leads for the first time to anti-2-aminooxazolines (C-O) in good to excellent yields. Simple removal of the bis-sulfoxide ligand from this reaction results in a complete switch in reactivity to afford anti-imidazolidinone products (C-N) in good yields and excellent diastereoselectivities. Mechanistic studies suggest the divergent C-O versus C-N reactivity from a common ambident nucleophile arises due to a switch in mechanism from allylic C-H cleavage/functionalization to olefin isomerization/oxidative amination.
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Affiliation(s)
- Iulia I. Strambeanu
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, United States
| | - M. Christina White
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, United States
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28
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Delcamp JH, Gormisky PE, White MC. Oxidative Heck vinylation for the synthesis of complex dienes and polyenes. J Am Chem Soc 2013; 135:8460-3. [PMID: 23701421 DOI: 10.1021/ja402891m] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We introduce an oxidative Heck reaction for selective complex diene and polyene formation. The reaction proceeds via oxidative Pd(II)/sulfoxide catalysis that retards palladium-hydride isomerizations which previously limited the Heck manifold's capacity for furnishing stereodefined conjugated dienes. Limiting quantities of nonactivated terminal olefins (1 equiv) and slight excesses of vinyl boronic esters (1.5 equiv) that feature diverse functionality can be used to furnish complex dienes and polyenes in good yields and excellent selectivities (generally E:Z = >20:1; internal:terminal = >20:1). Because this reaction only requires prior activation of a single vinylic carbon, improvements in efficiency are observed for synthetic sequences relative to ones featuring reactions that require activation of both coupling partners.
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Affiliation(s)
- Jared H Delcamp
- University of Mississippi, University, Mississippi 38677, USA
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29
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Bigi MA, White MC. Terminal olefins to linear α,β-unsaturated ketones: Pd(II)/hypervalent iodine co-catalyzed Wacker oxidation-dehydrogenation. J Am Chem Soc 2013; 135:7831-4. [PMID: 23672479 PMCID: PMC4084756 DOI: 10.1021/ja402651q] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Development of a mild (35 °C, no Brønsted acids) tandem Wacker oxidation-dehydrogenation of terminal olefins was accomplished using palladium(II) and hypervalent iodine co-catalysis. The reaction affords linear aryl and alkyl α,β-unsaturated ketones directly from readily available terminal olefins in good yields (average 75% per step) with excellent functional group tolerance and chemo- and stereoselectivities. The hypervalent iodine co-catalyst was found to be critical for dehydrogenation but was not effective as a stoichiometric oxidant.
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Affiliation(s)
- Marinus A. Bigi
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801
| | - M. Christina White
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801
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30
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Banerjee A, Bera A, Guin S, Rout SK, Patel BK. Regioselective ortho-hydroxylation of 2-arylbenzothiazole via substrate directed C–H activation. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.12.067] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Wen ZK, Xu YH, Loh TP. Palladium(ii)-catalyzed cross-coupling of simple alkenes with acrylates: a direct approach to 1,3-dienes through C–H activation. Chem Sci 2013. [DOI: 10.1039/c3sc52275j] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Wen ZK, Xu YH, Loh TP. Palladium-Catalyzed Cross-Coupling of Unactivated Alkenes with Acrylates: Application to the Synthesis of the C13-C21 Fragment of Palmerolide A. Chemistry 2012; 18:13284-7. [DOI: 10.1002/chem.201201806] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Indexed: 11/06/2022]
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33
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Li Y, Yin Z, Wang B, Meng XB, Li ZJ. Synthesis of orthogonally protected l-glucose, l-mannose, and l-galactose from d-glucose. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Shi E, Shao Y, Chen S, Hu H, Liu Z, Zhang J, Wan X. Tetrabutylammonium Iodide Catalyzed Synthesis of Allylic Ester with tert-Butyl Hydroperoxide as an Oxidant. Org Lett 2012; 14:3384-7. [DOI: 10.1021/ol3013606] [Citation(s) in RCA: 180] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Erbo Shi
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Ying Shao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Shulin Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Huayou Hu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Zhaojun Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Jie Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China, Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China, and Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, P. R. China
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35
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Directed Metal (Oxo) Aliphatic C–H Hydroxylations: Overriding Substrate Bias. J Am Chem Soc 2012; 134:9721-6. [DOI: 10.1021/ja301685r] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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36
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Abstract
A highly selective C-H amination reaction under iron catalysis has been developed. This novel system, which employs an inexpensive, nontoxic [Fe(III)Pc] catalyst (typically used as an industrial ink additive), displays a strong preference for allylic C-H amination over aziridination and all other C-H bond types (i.e., allylic > benzylic > ethereal > 3° > 2° ≫ 1°). Moreover, in polyolefinic substrates, the site selectivity can be controlled by the electronic and steric character of the allylic C-H bond. Although this reaction is shown to proceed via a stepwise mechanism, the stereoretentive nature of C-H amination for 3° aliphatic C-H bonds suggests a very rapid radical rebound step.
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Affiliation(s)
- Shauna M Paradine
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA
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37
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Liu Z, Bittman R. Synthesis of C-glycoside analogues of α-galactosylceramide via linear allylic C-H oxidation and allyl cyanate to isocyanate rearrangement. Org Lett 2012; 14:620-3. [PMID: 22233351 DOI: 10.1021/ol2032448] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
C-Glycoside analogues of α-galactosylceramide were synthesized in which several significant modifications known to promote Th-1 cytokine production were included. The key transformations include C-H oxidation, Sharpless asymmetric epoxidation, olefin cross metathesis, and an allyl cyanate to isocyanate rearrangement.
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Affiliation(s)
- Zheng Liu
- Department of Chemistry and Biochemistry, Queens College of The City University of New York, Flushing, New York 11367-1597, USA
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38
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Cui S, Wojtas L, Antilla JC. Pd-Catalyzed C4-Olefination of Oxazoles via C–H Bond Activation: Divergent Synthesis of Functionalized Amino Alcohol and Amino Acid Derivatives. Org Lett 2011; 13:5040-3. [DOI: 10.1021/ol201865h] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sunliang Cui
- Department of Chemistry and Department of Chemistry X-ray Facility, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Lukasz Wojtas
- Department of Chemistry and Department of Chemistry X-ray Facility, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Jon C. Antilla
- Department of Chemistry and Department of Chemistry X-ray Facility, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
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39
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Stang EM, White MC. On the macrocyclization of the erythromycin core: preorganization is not required. Angew Chem Int Ed Engl 2011; 50:2094-7. [PMID: 21344559 DOI: 10.1002/anie.201007309] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2010] [Revised: 12/31/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Erik M Stang
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL 61801, USA
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40
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Stang EM, White MC. On the Macrocyclization of the Erythromycin Core: Preorganization is Not Required. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007309] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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41
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McMurray L, O'Hara F, Gaunt MJ. Recent developments in natural product synthesis using metal-catalysed C–H bond functionalisation. Chem Soc Rev 2011; 40:1885-98. [DOI: 10.1039/c1cs15013h] [Citation(s) in RCA: 1396] [Impact Index Per Article: 107.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Vermeulen NA, Delcamp JH, White MC. Synthesis of complex allylic esters via C-H oxidation vs C-C bond formation. J Am Chem Soc 2010; 132:11323-8. [PMID: 20662536 PMCID: PMC3047454 DOI: 10.1021/ja104826g] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly general, predictably selective C-H oxidation method for the direct, catalytic synthesis of complex allylic esters is introduced. This Pd(II)/sulfoxide-catalyzed method allows a wide range of complex aryl and alkyl carboxylic acids to couple directly with terminal olefins to furnish (E)-allylic esters in synthetically useful yields and selectivities (16 examples, E/Z >or= 10:1) and without the use of stoichiometric coupling reagents or unstable intermediates. Strategic advantages of constructing allylic esters via C-H oxidation vs C-C bond-forming methods are evaluated and discussed in four "case studies".
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Affiliation(s)
- Nicolaas A. Vermeulen
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801
| | - Jared H. Delcamp
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801
| | - M. Christina White
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801
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43
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McGowan MA, Stevenson CP, Schiffler MA, Jacobsen EN. An enantioselective total synthesis of (+)-peloruside A. Angew Chem Int Ed Engl 2010; 49:6147-50. [PMID: 20586089 PMCID: PMC2993561 DOI: 10.1002/anie.201002177] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Meredeth A. McGowan
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138
| | - Christian P. Stevenson
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138
| | - Matthew A. Schiffler
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138
| | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, Fax: (+1) 617-496-1880
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44
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McGowan M, Stevenson C, Schiffler M, Jacobsen E. An Enantioselective Total Synthesis of (+)-Peloruside A. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201002177] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Qi XB, Rice GT, Lall MS, Plummer MS, White MC. Diversification of a β-Lactam Pharmacophore via Allylic C-H Amination: Accelerating Effect of Lewis Acid Co-Catalyst. Tetrahedron 2010; 66:4816-4826. [PMID: 21379377 DOI: 10.1016/j.tet.2010.04.064] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This report describes the use of Pd(II)/bis-sulfoxide 1 catalyzed intra- and intermolecular allylic C-H amination reactions to rapidly diversify structures containing a sensitive β-lactam core similar to that found in the monobactam antibiotic Aztreonam. Pharmacologically interesting oxazolidinone, oxazinanone, and linear amine motifs are rapidly installed with predictable and high selectivities under conditions that use limiting amounts of substrate. Additionally, we demonstrate for the first time that intramolecular C-H amination processes may be accelerated using catalytic amounts of a Lewis acid co-catalyst [Cr(III)(salen)Cl 2].
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Affiliation(s)
- Xiangbing Ben Qi
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801 USA
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46
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Thiery E, Aouf C, Belloy J, Harakat D, Le Bras J, Muzart J. Palladium-Catalyzed Allylic Acyloxylation of Terminal Alkenes in the Presence of a Base. J Org Chem 2010; 75:1771-4. [DOI: 10.1021/jo902587u] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emilie Thiery
- Institut de Chimie Moléculaire de Reims, UMR 6229 CNRS-Université de Reims Champagne-Ardenne, UFR des Sciences exactes et naturelles, BP 1039, 51687 REIMS Cedex 2, France
| | - Chahinez Aouf
- Institut de Chimie Moléculaire de Reims, UMR 6229 CNRS-Université de Reims Champagne-Ardenne, UFR des Sciences exactes et naturelles, BP 1039, 51687 REIMS Cedex 2, France
| | - Julien Belloy
- Institut de Chimie Moléculaire de Reims, UMR 6229 CNRS-Université de Reims Champagne-Ardenne, UFR des Sciences exactes et naturelles, BP 1039, 51687 REIMS Cedex 2, France
| | - Dominique Harakat
- Institut de Chimie Moléculaire de Reims, UMR 6229 CNRS-Université de Reims Champagne-Ardenne, UFR des Sciences exactes et naturelles, BP 1039, 51687 REIMS Cedex 2, France
| | - Jean Le Bras
- Institut de Chimie Moléculaire de Reims, UMR 6229 CNRS-Université de Reims Champagne-Ardenne, UFR des Sciences exactes et naturelles, BP 1039, 51687 REIMS Cedex 2, France
| | - Jacques Muzart
- Institut de Chimie Moléculaire de Reims, UMR 6229 CNRS-Université de Reims Champagne-Ardenne, UFR des Sciences exactes et naturelles, BP 1039, 51687 REIMS Cedex 2, France
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47
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Rice GT, White MC. Allylic C-H amination for the preparation of syn-1,3-amino alcohol motifs. J Am Chem Soc 2009; 131:11707-11. [PMID: 19645489 DOI: 10.1021/ja9054959] [Citation(s) in RCA: 194] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly selective and general Pd/sulfoxide-catalyzed allylic C-H amination reaction en route to syn-1,3-amino alcohol motifs is reported. Key to achieving this reactivity under mild conditions is the use of electron-deficient N-nosyl carbamate nucleophiles that are thought to promote functionalization by furnishing higher concentrations of anionic species in situ. The reaction is shown to be orthogonal to classical C-C bond-forming/-reduction sequences as well as nitrene-based C-H amination methods.
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Affiliation(s)
- Grant T Rice
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA
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48
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Reed SA, Mazzotti AR, White MC. A catalytic, Brønsted base strategy for intermolecular allylic C-H amination. J Am Chem Soc 2009; 131:11701-6. [PMID: 19645492 DOI: 10.1021/ja903939k] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A Brønsted base activation mode for oxidative, Pd(II)/sulfoxide-catalyzed, intermolecular C-H allylic amination is reported. N,N-diisopropylethylamine was found to promote amination of unactivated terminal olefins, forming the corresponding linear allylic amine products with high levels of stereo-, regio-, and chemoselectivity. The predictable and high selectivity of this C-H oxidation method enables late-stage incorporation of nitrogen into advanced synthetic intermediates and natural products.
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Affiliation(s)
- Sean A Reed
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, Illinois 61801, USA
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49
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Rao D, Best D, Yoshihara A, Gullapalli P, Morimoto K, Wormald MR, Wilson FX, Izumori K, Fleet GW. A concise approach to the synthesis of all twelve 5-deoxyhexoses: d-tagatose-3-epimerase—a reagent that is both specific and general. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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50
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Vermeulen NA, Chen MS, Christina White M. The Fe(PDP)-catalyzed aliphatic C–H oxidation: a slow addition protocol. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.11.082] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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