1
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Alexeev MS, Strelkova TV, Ilyin MM, Nelyubina YV, Bespalov IA, Medvedev MG, Khrustalev VN, Kuznetsov NY. Amine adducts of triallylborane as highly reactive allylborating agents for Cu(I)-catalyzed allylation of chiral sulfinylimines. Org Biomol Chem 2024; 22:4680-4696. [PMID: 38716901 DOI: 10.1039/d4ob00291a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
The implementation of selective catalytic processes with highly active reagents is an attractive strategy that meets the modern principles of sustainable development of chemistry. In the current study, we for the first time describe the method and general principles of Cu(I)-catalyzed allylation of imines with amine adducts of allylic triorganoboranes. Triallylborane is an extremely reactive compound and cannot be used for the catalytic allylation of imines, whereas its amine adducts are ideal substrates for catalysis. The structure of the amine fragment successfully balances the safety, selectivity and stability of the allylboron reagent, allowing it to demonstrate high activity in catalytic allylation reactions, exceeding many times any known allylboranes. The obtained results are supported by quantitative kinetics data and DFT calculations. The catalytic efficacy of the system was demonstrated on model sulfinylimines (23 examples). High diastereoselectivity up to >99% was achieved, including for the gram-scale synthesis of 2-hydroxyphenyl-derivatives. Taking into account the high reactivity and unsurpassed atom-economy of amine adducts of triallylborane (AAT), they can be considered as prospective allylation reagents with Cu(I) and other appropriate metallocatalysts.
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Affiliation(s)
- Michael S Alexeev
- A.N. Nesmeyanov Institute of Organoelement compounds, Russian Academy of Sciences, Vavilov st. 28, 119991 Moscow, Russian Federation.
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russian Federation
| | - Tatiana V Strelkova
- A.N. Nesmeyanov Institute of Organoelement compounds, Russian Academy of Sciences, Vavilov st. 28, 119991 Moscow, Russian Federation.
| | - Michael M Ilyin
- A.N. Nesmeyanov Institute of Organoelement compounds, Russian Academy of Sciences, Vavilov st. 28, 119991 Moscow, Russian Federation.
| | - Yulia V Nelyubina
- A.N. Nesmeyanov Institute of Organoelement compounds, Russian Academy of Sciences, Vavilov st. 28, 119991 Moscow, Russian Federation.
| | - Ivan A Bespalov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russian Federation
- Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow, 119991, Russian Federation
| | - Michael G Medvedev
- A.N. Nesmeyanov Institute of Organoelement compounds, Russian Academy of Sciences, Vavilov st. 28, 119991 Moscow, Russian Federation.
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russian Federation
| | - Victor N Khrustalev
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russian Federation
- Peoples Friendship University of Russia, Miklukho-Maklay st. 6, 117198 Moscow, Russian Federation
| | - Nikolai Yu Kuznetsov
- A.N. Nesmeyanov Institute of Organoelement compounds, Russian Academy of Sciences, Vavilov st. 28, 119991 Moscow, Russian Federation.
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russian Federation
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2
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Gao S, Liu J, Troya D, Chen M. Copper-Catalyzed Asymmetric Acylboration of 1,3-Butadienylboronate with Acyl Fluorides. Angew Chem Int Ed Engl 2023; 62:e202304796. [PMID: 37712934 PMCID: PMC11144059 DOI: 10.1002/anie.202304796] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Indexed: 09/16/2023]
Abstract
We report herein a Cu-catalyzed regio-, diastereo- and enantioselective acylboration of 1,3-butadienylboronate with acyl fluorides. Under the developed conditions, the reactions provide (Z)-β,γ-unsaturated ketones bearing an α-tertiary stereocenter with high Z-selectivity and excellent enantioselectivities. While direct access to highly enantioenriched E-isomers was not successful, we showed that such molecules can be synthesized with excellent E-selectivity and optical purities via Pd-catalyzed alkene isomerization from the corresponding Z-isomers. The orthogonal chemical reactivities of the functional groups embedded in the ketone products allow for diverse chemoselective transformations, which provides a valuable platform for further derivatization.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, 36849 Auburn, AL (USA); Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 210009 Nanjing, (China)
| | - Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, 36849 Auburn, AL (USA)
| | - Diego Troya
- Department of Chemistry, Virginia Tech, 24061 Blacksburg, VA (USA)
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, 36849 Auburn, AL (USA)
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3
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Liu J, Gao S, Miliordos E, Chen M. Asymmetric Syntheses of ( Z)- or ( E)-β,γ-Unsaturated Ketones via Silane-Controlled Enantiodivergent Catalysis. J Am Chem Soc 2023; 145:19542-19553. [PMID: 37639380 PMCID: PMC11144060 DOI: 10.1021/jacs.3c02595] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Cu-catalyzed highly stereoselective and enantiodivergent syntheses of (Z)- or (E)-β,γ-unsaturated ketones from 1,3-butadienyl silanes are developed. The nature of the silyl group of the dienes has a significant impact on the stereo- and enantioselectivity of the reactions. Under the developed catalytic systems, the reactions of acyl fluorides with phenyldiemthylsilyl-substituted 1,3-diene gave (Z)-β,γ-unsaturated ketones bearing an α-tertiary stereogenic center with excellent enantioselectivities and high Z-selectivities, where the reactions with triisopropylsilyl-substituted 1,3-butadiene formed (E)-β,γ-unsaturated ketones with high optical purities and excellent E-selectivities. The products generated from the reactions contain three functional groups with orthogonal chemical reactivities, which can undergo a variety of transformations to afford synthetically valuable intermediates.
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Affiliation(s)
- Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Shang Gao
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Evangelos Miliordos
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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4
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Liu J, Chen M. Stereoselective syntheses of 2-methyl-1,3-diol acetals via Re-catalyzed [1,3]-allylic alcohol transposition. Chem Sci 2023; 14:8103-8108. [PMID: 37538826 PMCID: PMC10395275 DOI: 10.1039/d2sc07059f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 07/01/2023] [Indexed: 08/05/2023] Open
Abstract
Rhenium-catalyzed stereoselective transposition of allylic alcohols is reported. In the presence of 1 mol% of Re2O7, (E)- or (Z)-δ-hydroxymethyl-anti-homoallylic alcohols were converted into the acetals of 2-methyl-1,3-syn-diols with excellent diastereoselectivities. 1,3-syn-Diol acetals can also be synthesized from (E)-δ-hydroxymethyl-syn-homoallylic alcohols.
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Affiliation(s)
- Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University Auburn AL 36849 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University Auburn AL 36849 USA
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5
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Boni YT, Vaitla J, Davies HML. Catalyst Controlled Site- and Stereoselective Rhodium(II) Carbene C(sp 3)-H Functionalization of Allyl Boronates. Org Lett 2023; 25:5-10. [PMID: 36563330 DOI: 10.1021/acs.orglett.2c03335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Rhodium(II) catalyst-controlled site- and stereoselective carbene insertion into the distal allylic C(sp3)-H bond of allyl boronates is reported. The optimum chiral catalyst for this reaction is Rh2(S-TPPTTL)4. The fidelity and asymmetric induction of this catalytic transformation allows for a highly diastereoselective and enantioselective C-C bond formation without interference from the allyl boronate functionality. The resulting functionalized allyl boronates are susceptible to stereoselective allylations, generating products with control of stereochemistry at four contiguous stereogenic centers.
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Affiliation(s)
- Yannick T Boni
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Janakiram Vaitla
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Huw M L Davies
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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6
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Gao S, Duan M, Andreola LR, Yu P, Wheeler SE, Houk KN, Chen M. Unusual Enantiodivergence in Chiral Brønsted Acid‐Catalyzed Asymmetric Allylation with β‐Alkenyl Allylic Boronates. Angew Chem Int Ed Engl 2022; 61:e202208908. [PMID: 35989224 DOI: 10.1002/anie.202208908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Indexed: 11/11/2022]
Abstract
We report herein a rare example of enantiodivergent aldehyde addition with β-alkenyl allylic boronates via chiral Brønsted acid catalysis. 2,6-Di-9-anthracenyl-substituted chiral phosphoric acid-catalyzed asymmetric allylation using β-vinyl substituted allylic boronate gave alcohols with R absolute configuration. The sense of asymmetric induction of the catalyst in these reactions is opposite to those in prior reports. Moreover, in the presence of the same acid catalyst, the reactions with β-2-propenyl substituted allylic boronate generated homoallylic alcohol products with S absolute configuration. Unusual substrate-catalyst C-H⋅⋅⋅π interactions in the favoured reaction transition state were identified as the origins of observed enantiodivergence through DFT computational studies.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
- China Pharmaceutical University Nanjing 210009 China
| | - Meng Duan
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
| | | | - Peiyuan Yu
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
| | | | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
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7
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Gao S, Duan M, Andreola LR, Yu P, Wheeler SE, Houk KN, Chen M. Unusual Enantiodivergence in Chiral Brønsted Acid‐Catalyzed Asymmetric Allylation with β‐Alkenyl Allylic Boronates. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shang Gao
- Auburn University Chemistry and Biochemistry UNITED STATES
| | - Meng Duan
- University of California Los Angeles Chemistry and Biochemistry UNITED STATES
| | | | - Peiyuan Yu
- Southern University of Science and Technology Chemistry CHINA
| | | | - Kendall N. Houk
- University of California Los Angeles Chemistry and Biochemistry UNITED STATES
| | - Ming Chen
- Auburn University Chemistry and Biochemistry 179 chemistry building 36849 Auburn UNITED STATES
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8
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Yuan J, Jain P, Antilla JC. Chiral Phosphoric Acid-Catalyzed Enantio- and Diastereoselective Allylboration of Aldehydes with β,γ-Substituted Allylboronates. J Org Chem 2022; 87:8256-8266. [PMID: 35657081 DOI: 10.1021/acs.joc.2c00764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The catalytic asymmetric addition of β,γ-substituted allylboronates to aldehydes has been described. Promoted by 5 mol % chiral phosphoric acid, the reactions were broadly applicable, scalable, and efficient, allowing for the formation of 3,4-anti/syn-homoallylic alcohols bearing adjacent tertiary or quaternary stereogenic centers in a highly enantio- and diastereoselective manner (≤99% ee and dr >20:1). The rigid chairlike transition state involving the chiral phosphoric acid contributed to the highly controlled reaction.
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Affiliation(s)
- Jinping Yuan
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Pankaj Jain
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts 02139, United States
| | - Jon C Antilla
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China.,School of Science, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
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9
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del Corte X, Martínez de Marigorta E, Palacios F, Vicario J, Maestro A. An overview of the applications of chiral phosphoric acid organocatalysts in enantioselective additions to CO and CN bonds. Org Chem Front 2022. [DOI: 10.1039/d2qo01209j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Since 2004, chiral phosphoric acids (CPAs) have emerged as highyl efficient organocatalysts, providing excellent results in a wide reaction scope. In this review, the applications of CPA for enantioselective additions to CO and CN bonds are covered.
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Affiliation(s)
- Xabier del Corte
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Edorta Martínez de Marigorta
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Aitor Maestro
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
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10
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Liu J, Gao S, Chen M. Development of α-Borylmethyl-( Z)-crotylboronate Reagent and Enantioselective Syntheses of ( E)-δ-Hydroxymethyl- syn-homoallylic Alcohols via Highly Stereoselective Allylboration. Org Lett 2021; 23:9451-9456. [PMID: 34860521 DOI: 10.1021/acs.orglett.1c03628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report herein the development of α-borylmethyl-(Z)-crotylboronate reagent and the application in highly stereo- and enantioselective syntheses of (E)-δ-hydroxymethyl-syn-homoallylic alcohols. Starting from 1,4-pentadiene, α-borylmethyl-(Z)-crotylboronate was synthesized in two steps with high Z-selectivity and enantioselectivity. Subsequent aldehyde allylboration with the developed boron reagent gave highly enantioenriched (E)-δ-hydroxymethyl-syn-homoallylic alcohols upon oxidative workup.
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Affiliation(s)
- Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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11
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Gao S, Duan M, Liu J, Yu P, Houk KN, Chen M. Stereochemical Control via Chirality Pairing: Stereodivergent Syntheses of Enantioenriched Homoallylic Alcohols. Angew Chem Int Ed Engl 2021; 60:24096-24106. [PMID: 34608723 DOI: 10.1002/anie.202107004] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Indexed: 12/14/2022]
Abstract
We report herein the development of stereodivergent syntheses of enantioenriched homoallylic alcohols using chiral nonracemic α-CH2 Bpin-substituted crotylboronate. Chiral phosphoric acid (S)-A-catalyzed asymmetric allyl addition with the reagent gave Z-anti-homoallylic alcohols with excellent enantioselectivities and Z-selectivities. When the enantiomeric acid catalyst (R)-A was utilized, the stereoselectivity was completely reversed and E-anti-homoallylic alcohols were obtained with high E-selectivities and excellent enantioselectivities. By pairing the chirality of the boron reagent with the catalyst, two complementary stereoisomers of chiral homoallylic alcohols can be obtained selectively from the same boron reagent. DFT computational studies were conducted to probe the origins of the observed stereoselectivity. These reactions generate highly enantioenriched homoallylic alcohol products that are valuable for rapid construction of polyketide structural frameworks.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, 36849, USA
| | - Meng Duan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California, 90095, USA.,Department of Chemistry and Shenzhen Grubbs Institute, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, 36849, USA
| | - Peiyuan Yu
- Department of Chemistry and Shenzhen Grubbs Institute, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California, 90095, USA
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, 36849, USA
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12
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Gao S, Liu J, Chen M. Catalytic asymmetric transformations of racemic α-borylmethyl-( E)-crotylboronate via kinetic resolution or enantioconvergent reaction pathways. Chem Sci 2021; 12:13398-13403. [PMID: 34777758 PMCID: PMC8528009 DOI: 10.1039/d1sc04047b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/01/2021] [Indexed: 11/03/2022] Open
Abstract
We report herein catalytic asymmetric transformations of racemic α-borylmethyl-(E)-crotylboronate. The Brønsted acid-catalyzed kinetic resolution-allylboration reaction sequence of the racemic reagent gave (Z)-δ-hydroxymethyl-anti-homoallylic alcohols with high Z-selectivities and enantioselectivities upon oxidative workup. In parallel, enantioconvergent pathways were utilized to synthesize chiral nonracemic 1,5-diols and α,β-unsaturated aldehydes with excellent optical purity.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry, Auburn University Auburn AL 36849 USA
| | - Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University Auburn AL 36849 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University Auburn AL 36849 USA
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13
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Liu J, Gao S, Chen M. Asymmetric Syntheses of ( E)-δ-Hydroxymethyl- anti-homoallylic Alcohols via Highly Enantio- and Stereoselective Aldehyde Allylation with α-Borylmethyl-( E)-crotylboronate. Org Lett 2021; 23:7808-7813. [PMID: 34558913 DOI: 10.1021/acs.orglett.1c02831] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Highly stereo- and enantioselective synthesis of (E)-δ-hydroxymethyl-anti-homoallylic alcohols is reported. Under the developed conditions, reactions between aldehydes and chiral nonracemic α-borylmethyl-(E)-crotylboronate upon oxidative workup gave δ-hydroxymethyl-anti-homoallylic alcohols with high E-selectivities and enantioselectivities.
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Affiliation(s)
- Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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14
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Liu J, Chen M. Highly stereoselective syntheses of ( E)-δ-boryl- anti-homoallylic alcohols via allylation with α-boryl-( E)-crotylboronate. Chem Commun (Camb) 2021; 57:10799-10802. [PMID: 34590625 DOI: 10.1039/d1cc04058h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly stereoselective synthesis of (E)-δ-boryl-anti-homoallylic alcohols is developed. In the presence of a Lewis acid, aldehyde allylation with α-boryl-(E)-crotylboronate gave δ-boryl-anti-homoallylic alcohols in good yields with excellent E-selectivity. The E-vinylboronate group in the products provides a useful handle for cross-coupling reactions as illustrated in the fragment synthesis of chaxamycins.
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Affiliation(s)
- Jiaming Liu
- Departments of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849, USA.
| | - Ming Chen
- Departments of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849, USA.
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15
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Gao S, Duan M, Liu J, Yu P, Houk KN, Chen M. Stereochemical Control via Chirality Pairing: Stereodivergent Syntheses of Enantioenriched Homoallylic Alcohols. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
| | - Meng Duan
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles California 90095 USA
- Department of Chemistry and Shenzhen Grubbs Institute Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Jiaming Liu
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
| | - Peiyuan Yu
- Department of Chemistry and Shenzhen Grubbs Institute Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles California 90095 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
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16
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Chen M. Cu-catalyzed coupling of vinylidene cyclopropanes with allyl and allenyl boronates. Chem Commun (Camb) 2021; 57:9212-9215. [PMID: 34519300 DOI: 10.1039/d1cc03823k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of Cu-catalyzed coupling of vinylidene cyclopropanes with allyl or allenyl boronates is reported. The reaction forms a C-C bond at the terminal carbon atom of the allene moiety of vinylidene cyclopropanes with concurrent opening of the cyclopropane ring. In addition, the resulting Cu-enolate intermediate can be intercepted by external electrophiles.
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Affiliation(s)
- Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, 36849, USA.
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17
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Liu J, Su B, Chen M. Cu-Catalyzed Highly Stereoselective Syntheses of ( E)-δ-Vinyl-homoallylic Alcohols. Org Lett 2021; 23:6035-6040. [PMID: 34282917 DOI: 10.1021/acs.orglett.1c02086] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Stereoselective synthesis of (E)-δ-vinyl-homoallylic alcohols was developed. Starting from α-vinyl allylboronate, Cu-catalyzed allylation of aldehydes or ketones forms secondary or tertiary δ-vinyl-homoallylic alcohols with high E-selectivities. It is proposed that the reaction operates under the Curtin-Hammett principle via the intermediacy of α-vinyl allylic copper species to give the alcohol products with high E-selectivities.
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Affiliation(s)
- Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Bo Su
- College of Pharmacy, State Key Laboratory of Medical Chemical Biology, Nankai University, Tianjin, China
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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18
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Garnes‐Portolés F, Miguélez R, Grayson MN, Barrio P. ω‐Alkenylallylboronates: Design, Synthesis, and Application to the Asymmetric Allylation/RCM Tandem Sequence. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Rubén Miguélez
- Departmento de Química Orgánica e Inorgánica Universidad de Oviedo Avenida Julian Clavería 8 33006 Oviedo Spain
| | - Matthew N. Grayson
- Department of Chemistry University of Bath Claverton Down Bath BA2 7AY UK
| | - Pablo Barrio
- Departmento de Química Orgánica Universidad de Valencia 46100 Burjassot Spain
- Departmento de Química Orgánica e Inorgánica Universidad de Oviedo Avenida Julian Clavería 8 33006 Oviedo Spain
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Zou C, Niu C, Liu X, Zhang C. Recent Advances about Protoboration of Conjugated Dienes. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202105058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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