1
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Waser P, Faghtmann J, Gil-Ordóñez M, Kristensen A, Svenningsen EB, Poulsen TB, Jørgensen KA. Enantioselective Synthesis of α-Quaternary Isochromanes by Oxidative Aminocatalysis and Gold Catalysis. Chemistry 2024; 30:e202401354. [PMID: 38629389 DOI: 10.1002/chem.202401354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Indexed: 05/24/2024]
Abstract
A novel strategy that combines oxidative aminocatalysis and gold catalysis allows the preparation of chiral α-quaternary isochromanes, a motif that is prevalent in natural products and synthetic bioactive compounds. In the first step, α-branched aldehydes and propargylic alcohols are transformed into α-quaternary ethers with excellent optical purities (>90 % ee) via oxidative umpolung with DDQ and an amino acid-derived primary amine catalyst. Subsequent gold(I)-catalyzed intramolecular hydroarylation affords the isochromane products with retention of the quaternary stereocenter. A second approach explores the use of allylic alcohols as reaction partners for the oxidative coupling to furnish α-quaternary ethers with generally lower enantiopurities. Stereoretentive cyclization to isochromane products is achieved via intramolecular Friedel-Crafts type alkylation with allylic acetates as a reactive handle. A number of synthetic elaborations and a biological study on these α-quaternary isochromanes highlight the potential applicability of the presented method.
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Affiliation(s)
- Philipp Waser
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Jonas Faghtmann
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Marta Gil-Ordóñez
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Anne Kristensen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Esben B Svenningsen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Thomas B Poulsen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Karl Anker Jørgensen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
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2
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Takasu K, Takikawa H, Tawatari T, Kato R. Intramolecular Propargylic Ene Reaction of Benzyne En Route to Highly Functionalized Allenes and Allenamides. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1826-2545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractA variety of highly functionalized allenes and allenamides are prepared by intramolecular propargylic ene reactions of benzynes. Specific benzyne precursors having a chlorodiisopropylsilyl group serve as platforms to link with various propargyl alcohols via a Si–O bond, thereby expanding the scope of this reaction. Also demonstrated is a complete transmission of point to axial chirality to give a chiral, non-racemic allenamide.
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3
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Zhang FH, Guo X, Zeng X, Wang Z. Catalytic Enantioconvergent Allenylation of Aldehydes with Propargyl Halides. Angew Chem Int Ed Engl 2022; 61:e202117114. [PMID: 35029018 DOI: 10.1002/anie.202117114] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Indexed: 11/09/2022]
Abstract
α-Allenol is a versatile synthon in organic synthesis. The catalytic asymmetric synthesis of α-allenols from readily available starting materials remains a prominent challenge, especially when simultaneous control over axial and central chirality is required. Herein, we describe the Cr-catalyzed enantioconvergent allenylation of aldehydes with racemic propargyl halides to rapidly access a wide range of chiral α-allenols with adjacent axial and central chiralities. This method features excellent regio-, diastereo- and enantioselectivity control with broad substrate scope, and provides facile access to all four stereoisomers when allied with a Mitsunobu reaction. Preliminary mechanistic studies support radical-based reaction pathways. The synthetic utility is demonstrated by the application in late-stage functionalization and the formal total synthesis of (+)-varitriol.
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Affiliation(s)
- Feng-Hua Zhang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, 310024, Zhejiang Province, China
| | - Xiaochong Guo
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, 310024, Zhejiang Province, China
| | - Xianrong Zeng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, 310024, Zhejiang Province, China
| | - Zhaobin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, Zhejiang Province, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, 310024, Zhejiang Province, China
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4
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Zhang F, Guo X, Zeng X, Wang Z. Catalytic Enantioconvergent Allenylation of Aldehydes with Propargyl Halides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Feng‐Hua Zhang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University Hangzhou 310024, Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study Hangzhou 310024, Zhejiang Province China
| | - Xiaochong Guo
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University Hangzhou 310024, Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study Hangzhou 310024, Zhejiang Province China
| | - Xianrong Zeng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University Hangzhou 310024, Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study Hangzhou 310024, Zhejiang Province China
| | - Zhaobin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of Science Westlake University Hangzhou 310024, Zhejiang Province China
- Institute of Natural Sciences Westlake Institute for Advanced Study Hangzhou 310024, Zhejiang Province China
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5
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Wang B, Wang X, Yin X, Yu W, Liao Y, Ye J, Wang M, Liao J. Cu-Catalyzed S N2' Substitution of Propargylic Phosphates with Vinylarene-Derived Chiral Nucleophiles: Synthesis of Chiral Allenes. Org Lett 2019; 21:3913-3917. [PMID: 31074282 DOI: 10.1021/acs.orglett.9b00908] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new Cu-catalyzed enantioselective three-component (i.e., styrenes, B2pin2, and propargylic phosphates) allenylation via an SN2' substitution of propargylic electrophiles with vinylarene-derived chiral nucleophiles is presented. This method provides an efficient and enantioselective approach to access a range of optically pure di-(1,1-), tri-, and tetra-substituted allenes with α-central chirality and axial chirality in excellent chemo-, regio-, diastereo-, and enantioselectivities.
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Affiliation(s)
- Bing Wang
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xihong Wang
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xuemei Yin
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Wangzhi Yu
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Yang Liao
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jialin Ye
- College of Chemical Engineering , Sichuan University Chengdu 610065 , China
| | - Min Wang
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jian Liao
- Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China.,College of Chemical Engineering , Sichuan University Chengdu 610065 , China
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6
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Han JT, Yun J. Asymmetric synthesis of α-chiral β-hydroxy allenes: copper-catalyzed γ-selective borylative coupling of vinyl arenes and propargyl phosphates. Chem Commun (Camb) 2019; 55:9813-9816. [PMID: 31360939 DOI: 10.1039/c9cc04165f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Copper-catalyzed enantioselective coupling of vinyl arenes with bis(pinacolato)diboron (B2pin2) and propargylic phosphates is presented.
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Affiliation(s)
- Jung Tae Han
- Department of Chemistry
- Sungkyunkwan University
- Suwon 16419
- Korea
| | - Jaesook Yun
- Department of Chemistry
- Sungkyunkwan University
- Suwon 16419
- Korea
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7
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Wang M, Khan S, Miliordos E, Chen M. Enantioselective Allenylation of Aldehydes via Brønsted Acid Catalysis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801080] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mengzhou Wang
- Department of Chemistry and Biochemistry; Auburn University, Auburn; AL 36849 United States
| | - Shahriar Khan
- Department of Chemistry and Biochemistry; Auburn University, Auburn; AL 36849 United States
| | - Evangelos Miliordos
- Department of Chemistry and Biochemistry; Auburn University, Auburn; AL 36849 United States
| | - Ming Chen
- Department of Chemistry and Biochemistry; Auburn University, Auburn; AL 36849 United States
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8
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Domingo-Legarda P, Soler-Yanes R, Quirós-López MT, Buñuel E, Cárdenas DJ. Iron-Catalyzed Coupling of Propargyl Bromides and Alkyl Grignard Reagents. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800849] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Pablo Domingo-Legarda
- Department of Organic Chemistry; Facultad de Ciencias; Universidad Autónoma de Madrid; Institute for Advanced Research in Chemical Sciences (IAdChem); Campus de Cantoblanco 28049 Madrid Spain
| | - Rita Soler-Yanes
- Department of Organic Chemistry; Facultad de Ciencias; Universidad Autónoma de Madrid; Institute for Advanced Research in Chemical Sciences (IAdChem); Campus de Cantoblanco 28049 Madrid Spain
| | - M. Teresa Quirós-López
- Department of Organic Chemistry; Facultad de Ciencias; Universidad Autónoma de Madrid; Institute for Advanced Research in Chemical Sciences (IAdChem); Campus de Cantoblanco 28049 Madrid Spain
| | - Elena Buñuel
- Department of Organic Chemistry; Facultad de Ciencias; Universidad Autónoma de Madrid; Institute for Advanced Research in Chemical Sciences (IAdChem); Campus de Cantoblanco 28049 Madrid Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry; Facultad de Ciencias; Universidad Autónoma de Madrid; Institute for Advanced Research in Chemical Sciences (IAdChem); Campus de Cantoblanco 28049 Madrid Spain
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9
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NiICatalyzes the Regioselective Cross-Coupling of Alkylzinc Halides and Propargyl Bromides to Allenes. Chemistry 2017; 23:1584-1590. [DOI: 10.1002/chem.201603758] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Indexed: 12/14/2022]
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10
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Hasanov HH, Ivanov IK, Christov VC. Bifunctionalized allenes, Part XIX: Synthesis, electrophilic cyclization/addition, and coinage metal-catalyzed cycloisomerization of phosphorylated 3-(β-hydroxy)allenes. HETEROATOM CHEMISTRY 2016. [DOI: 10.1002/hc.21357] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hasan H. Hasanov
- Department of Organic Chemistry and Technology; Faculty of Natural Sciences; Konstantin Preslavsky University of Shumen; Shumen Bulgaria
| | - Ivaylo K. Ivanov
- Department of Organic Chemistry and Technology; Faculty of Natural Sciences; Konstantin Preslavsky University of Shumen; Shumen Bulgaria
| | - Valerij Ch. Christov
- Department of Organic Chemistry and Technology; Faculty of Natural Sciences; Konstantin Preslavsky University of Shumen; Shumen Bulgaria
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11
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Lin W, Cheng J, Ma S. Iron(III) Chloride-Catalyzed Tandem Aza-Prins/Friedel-Crafts Cyclization of 2-Arylethyl-2,3-butadienyl Tosylamides and Aldehydes-An Efficient Synthesis of Benzo[f]isoquinolines. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600107] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12
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Li W, Lin Z, Chen L, Tian X, Wang Y, Huang SH, Hong R. Highly stereoselective kinetic resolution of α-allenic alcohols: an enzymatic approach. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.098] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Shen R, Luo B, Yang J, Zhang L, Han LB. Convenient synthesis of allenylphosphoryl compounds via Cu-catalysed couplings of P(O)H compounds with propargyl acetates. Chem Commun (Camb) 2016; 52:6451-4. [DOI: 10.1039/c6cc02563c] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Cu-catalysed substitution reaction of propargyl acetates with P(O)H compounds is developed to afford allenylphosphoryl compounds in high yields. A plausible mechanism involving the nucleophilic interception of Cu-allenylidene intermediates is proposed.
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Affiliation(s)
- Ruwei Shen
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Bing Luo
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Jianlin Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Lixiong Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Li-Biao Han
- National Institute of Advanced Industrial Science & Technology (AIST)
- Tsukuba
- Japan
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14
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Sharma P, Liu RS. Cu-Catalyzed Aerobic Oxidative Cyclizations of 3-N-Hydroxyamino-1,2-propadienes with Alcohols, Thiols, and Amines To Form α-O-,S-, andN-Substituted 4-Methylquinoline Derivatives. Chemistry 2015; 21:4590-4. [DOI: 10.1002/chem.201406317] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 12/11/2022]
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15
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Zhang J, Ye J, Ma S. Harmony of CdI2with CuBr for the one-pot synthesis of optically active α-allenols. Org Biomol Chem 2015; 13:4080-9. [DOI: 10.1039/c4ob02673j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient one-pot synthesis of chiral α-allenols from propargylic alcohols, aldehydes and pyrrolidine induced by CuBr and (R,Ra)-N-PINAP or (R,Sa)-N-PINAP and CdI2has been developed.
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Affiliation(s)
- Jiasheng Zhang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Juntao Ye
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
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16
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Ismailov IE, Ivanov IK, Christov VC. Bifunctionalized allenes. Part XIII. A convenient and efficient method for regioselective synthesis of phosphorylated α-hydroxyallenes with protected and unprotected hydroxy group. Molecules 2014; 19:6309-29. [PMID: 24840901 PMCID: PMC6271065 DOI: 10.3390/molecules19056309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 05/01/2014] [Accepted: 05/05/2014] [Indexed: 11/17/2022] Open
Abstract
The paper describes a convenient and efficient method for regioselective synthesis of phosphorylated α-hydroxyallenes using an atom economical [2,3]-sigmatropic rearrangement of intermediate propargyl phosphites or phosphinites. These can be readily prepared via reaction of protected alkynols with dimethyl chlorophosphite or chlorodiphenyl phosphine respectively in the presence of a base.
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Affiliation(s)
- Ismail E Ismailov
- Department of Organic Chemistry & Technology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, 115, Universitetska Str., BG-9712 Shumen, Bulgaria.
| | - Ivaylo K Ivanov
- Department of Organic Chemistry & Technology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, 115, Universitetska Str., BG-9712 Shumen, Bulgaria.
| | - Valerij Ch Christov
- Department of Organic Chemistry & Technology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, 115, Universitetska Str., BG-9712 Shumen, Bulgaria.
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17
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Li S, Miao B, Yuan W, Ma S. Carbometalation–Carboxylation of 2,3-Allenols with Carbon Dioxide: A Dramatic Effect of Halide Anion. Org Lett 2013; 15:977-9. [DOI: 10.1021/ol4000197] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Suhua Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China, and Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, 3663 North Zhongshan Lu, Shanghai 200062, P. R. China
| | - Bukeyan Miao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China, and Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, 3663 North Zhongshan Lu, Shanghai 200062, P. R. China
| | - Weiming Yuan
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China, and Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, 3663 North Zhongshan Lu, Shanghai 200062, P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China, and Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, 3663 North Zhongshan Lu, Shanghai 200062, P. R. China
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18
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Li Z, Boyarskikh V, Hansen JH, Autschbach J, Musaev DG, Davies HML. Scope and mechanistic analysis of the enantioselective synthesis of allenes by rhodium-catalyzed tandem ylide formation/[2,3]-sigmatropic rearrangement between donor/acceptor carbenoids and propargylic alcohols. J Am Chem Soc 2012; 134:15497-504. [PMID: 22924394 DOI: 10.1021/ja3061529] [Citation(s) in RCA: 157] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rhodium-catalyzed reactions of tertiary propargylic alcohols with methyl aryl- and styryldiazoacetates result in tandem reactions, consisting of oxonium ylide formation followed by [2,3]-sigmatropic rearrangement. This process competes favorably with the standard O-H insertion reaction of carbenoids. The resulting allenes are produced with high enantioselectivity (88-98% ee) when the reaction is catalyzed by the dirhodium tetraprolinate complex, Rh(2)(S-DOSP)(4). Kinetic resolution is possible when racemic tertiary propargylic alcohols are used as substrates. Under the kinetic resolution conditions, the allenes are formed with good diastereoselectivity and enantioselectivity (up to 6.1:1 dr, 88-93% ee), and the unreacted alcohols are enantioenriched to 65-95% ee. Computational studies reveal that the high asymmetric induction is obtained via an organized transition state involving a two-point attachment: ylide formation between the alcohol oxygen and the carbenoid and hydrogen bonding of the alcohol to a carboxylate ligand. The 2,3-sigmatropic rearrangement proceeds through initial cleavage of the O-H bond to generate an intermediate with close-lying open-shell singlet, triplet, and closed-shell singlet electronic states. This intermediate would have significant diradical character, which is consistent with the observation that the 2,3-sigmatropic rearrangement is favored with donor/acceptor carbenoids and more highly functionalized propargylic alcohols.
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Affiliation(s)
- Zhanjie Li
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, USA
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19
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Kong W, Qiu Y, Zhang X, Fu C, Ma S. Exclusive 1,2-Aryl Shift in Platinum(II) Chloride-Catalyzed Cyclization of 1-(Indol-2-yl)-2,3-allenols. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100935] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Li S, Zhou W, Gao H, Zhou Z. Density functional theory study of (13)C NMR chemical shift of chlorinated compounds. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2012; 50:106-113. [PMID: 22354788 DOI: 10.1002/mrc.2837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 06/25/2011] [Accepted: 08/25/2011] [Indexed: 05/31/2023]
Abstract
The use of the standard density functional theory (DFT) leads to an overestimation of the paramagnetic contribution and underestimation of the shielding constants, especially for chlorinated carbon nuclei. For that reason, the predictions of chlorinated compounds often yield too high chemical shift values. In this study, the WC04 functional is shown to be capable of reducing the overestimation of the chemical shift of Cl-bonded carbons in standard DFT functionals and to show a good performance in the prediction of (13)C NMR chemical shifts of chlorinated organic compounds. The capability is attributed to the minimization of the contributions that intensively increase the chemical shift in the WC04. Extensive computations and analyses were performed to search for the optimal procedure for WC04. The B3LYP and mPW1PW91 standard functionals were also used to evaluate the performance. Through detailed comparisons between the basis set effects and the solvent effects on the results, the gas-phase GIAO/WC04/6-311+G(2d,p)//B3LYP/6-31+G(d,p) was found to be specifically suitable for the prediction of (13)C NMR chemical shifts of chlorides in both chlorinated and non-chlorinated carbons. Further tests with eight molecules in the probe set sufficiently confirmed that WC04 was undoubtedly effective for accurately predicting (13) C NMR chemical shifts of chlorinated organic compounds.
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Affiliation(s)
- Songqing Li
- Department of Applied Chemistry, China Agricultural University, Beijing, 100193, China
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21
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Kong W, Fu C, Ma S. Efficient synthesis of carbazoles via PtCl2-catalyzed RT cyclization of 1-(indol-2-yl)-2,3-allenols: scope and mechanism. Org Biomol Chem 2012; 10:2164-73. [DOI: 10.1039/c1ob06474f] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Zheng JC, Yun SY, Sun C, Lee NK, Lee D. Selectivity Control in Alkylidene Carbene-Mediated C−H Insertion and Allene Formation. J Org Chem 2011; 76:1086-99. [PMID: 21244086 DOI: 10.1021/jo102180f] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Jun-Cheng Zheng
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Sang Young Yun
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Chunrui Sun
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Nam-Kyu Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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23
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Abstract
This short review highlights some of the recent important developments on the synthesis of allenes and its applications on the synthesis of some allenic natural products and allenic-based optoelectronic materials.
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Affiliation(s)
- Shichao Yu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai 200032
- P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai 200032
- P. R. China
- Shanghai Key Laboratory of Green Chemistry and Process
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Barluenga J, Suero MG, De la Campa R, Flórez J. Enantioselective Synthesis of 4-Hydroxy-2-cyclohexenones through a Multicomponent Cyclization. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Barluenga J, Suero MG, De la Campa R, Flórez J. Enantioselective Synthesis of 4-Hydroxy-2-cyclohexenones through a Multicomponent Cyclization. Angew Chem Int Ed Engl 2010; 49:9720-4. [DOI: 10.1002/anie.201004413] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kong W, Fu C, Ma S. An Efficient Synthesis of Polysubstituted Naphthalene Derivatives by Gold-Catalyzed Cyclization of 1-Arylalka-2,3-dienyl Acetates. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001112] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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