51
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Estaitie M, Hall DG. Regiocontrolled synthesis of enantioenriched 2-substituted dehydropiperidines by stereospecific allyl-allyl cross-coupling of a chiral allylic boronate. Chem Commun (Camb) 2022; 58:1370-1373. [PMID: 34989368 DOI: 10.1039/d1cc06186k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The palladium-catalyzed cross-coupling of an optically enriched dehydropiperidinyl boronate with cinnamyl carbonates was optimized to minimize stereochemical erosion. Although the coupling of two unsymmetrical allyl fragments may generate four possible regioisomers, the optimal procedure using (p-CF3C6H4)3P as the ligand affords linear 2-allylated 3,4-dehydropiperidines exclusively (>98 : 2 rr) with enantiospecificity up to 99%.
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Affiliation(s)
- Mohamad Estaitie
- Department of Chemistry, University of Alberta, 4-010 CCIS, Edmonton, AB, T6G 2G2, Canada.
| | - Dennis G Hall
- Department of Chemistry, University of Alberta, 4-010 CCIS, Edmonton, AB, T6G 2G2, Canada.
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52
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Gates AM, Jos S, Santos WL. Ligand-free copper-catalyzed borylative defluorination: access to gem-difluoroallyl boronic acid derivatives. Org Biomol Chem 2022; 20:366-374. [PMID: 34605836 DOI: 10.1039/d1ob01533h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report a ligand-free copper-catalyzed β-borylation, defluorination of β-substituted, α-trifluoromethyl-α,β-unsaturated esters. The reaction affords geminal-difluoroallyl boronic acid derivatives in moderate to good yield. The reaction was tolerant of various substrates, and the utility of products was demonstrated in the defluorinative functionalization of the difluoroalkene to afford enol ethers.
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Affiliation(s)
- Ashley M Gates
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
| | - Swetha Jos
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
| | - Webster L Santos
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
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53
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Truong S, Mootoo DR. C-Glycosylcrotylboronates for the Synthesis of Glycomimetics. Org Lett 2021; 24:191-195. [PMID: 34958591 DOI: 10.1021/acs.orglett.1c03845] [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 stereoselective synthesis of E- and Z- isomers of a C- mannosyl crotylpinacolboronate via Ni-promoted reactions on an allylic acetate and a diene precursor, respectively, is described. The E- and Z- isomers reacted with 1,2-O-isopropylidene glyceraldehyde in the presence or absence of (R)- and (S)- TRIP catalysts, to give predominantly 3,4-anti and 3,4-syn crotylation products, respectively, with moderate to high facial selectivity. These products were transformed to biologically relevant C-manno-disaccharides.
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Affiliation(s)
- Steven Truong
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Graduate Center, CUNY, 365 Fifth Avenue, New York, New York 10016, United States
| | - David R Mootoo
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Graduate Center, CUNY, 365 Fifth Avenue, New York, New York 10016, United States
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54
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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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55
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Wang Q, Biosca M, Himo F, Szabó KJ. Electrophilic Fluorination of Alkenes via Bora‐Wagner–Meerwein Rearrangement. Access to β‐Difluoroalkyl Boronates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Qiang Wang
- Department of Organic Chemistry Stockholm University Sweden
| | - Maria Biosca
- Department of Organic Chemistry Stockholm University Sweden
| | - Fahmi Himo
- Department of Organic Chemistry Stockholm University Sweden
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56
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Wang Q, Biosca M, Himo F, Szabó KJ. Electrophilic Fluorination of Alkenes via Bora-Wagner-Meerwein Rearrangement. Access to β-Difluoroalkyl Boronates. Angew Chem Int Ed Engl 2021; 60:26327-26331. [PMID: 34613633 PMCID: PMC9299629 DOI: 10.1002/anie.202109461] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/06/2021] [Indexed: 01/26/2023]
Abstract
The electrophilic fluorination of geminal alkyl substituted vinyl-Bmida derivatives proceeds via bora-Wagner-Meerwein rearrangement. According to DFT modelling studies this rearrangement occurs with a low activation barrier via a bora-cyclopropane shaped TS. The Bmida group has a larger migration aptitude than the alkyl moiety in the Wagner-Meerwein rearrangement of the presented electrophilic fluorination reactions.
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Affiliation(s)
- Qiang Wang
- Department of Organic ChemistryStockholm UniversitySweden
| | - Maria Biosca
- Department of Organic ChemistryStockholm UniversitySweden
| | - Fahmi Himo
- Department of Organic ChemistryStockholm UniversitySweden
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57
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Su W, Wang TT, Tian X, Han JR, Zhen XL, Fan SM, You YX, Zhang YK, Qiao RX, Cheng Q, Liu S. Stereoselective Dehydroxyboration of Allylic Alcohols to Access ( E)-Allylboronates by a Combination of C-OH Cleavage and Boron Transfer under Iron Catalysis. Org Lett 2021; 23:9094-9099. [PMID: 34780200 DOI: 10.1021/acs.orglett.1c03359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Iron-catalyzed direct SN2' dehydroxyboration of allylic alcohols has been developed to access (E)-stereoselective allylboronates. Allylic alcohols with diverse structures and functional groups, especially derived from natural products, underwent smooth transformation. The six-membered ring transition state formed by allylic alcohols and iron-boron intermediate was indicated to be the key component involved in transfer of the boron group, activation of the C-OH bond, and control of the stereoselectivity.
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Affiliation(s)
- Wei Su
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Ting-Ting Wang
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Xia Tian
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Jian-Rong Han
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Xiao-Li Zhen
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Shi-Ming Fan
- Hebei Key Laboratory of Molecular Chemistry for Drug, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Ya-Xin You
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Yu-Kun Zhang
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Rui-Xiao Qiao
- Hebei Key Laboratory of Molecular Chemistry for Drug, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Qiushi Cheng
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China.,Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Shouxin Liu
- Hebei Key Laboratory of Molecular Chemistry for Drug, Hebei University of Science and Technology, Shijiazhuang 050022, China
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58
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Wang TC, Wang PS, Chen DF, Gong LZ. Access to chiral homoallylic vicinal diols from carbonyl allylation of aldehydes with allyl ethers via palladium-catalyzed allylic C-H borylation. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1134-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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59
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Tang X, Su Z, Yan L, Tang Q, Dong S, Lin L, Feng X. Diastereo- and Enantioselective Synthesis of 3-Allyl-3-hydroxyoxindoles via Allylation of Isatins. Org Lett 2021; 23:8419-8423. [PMID: 34740286 DOI: 10.1021/acs.orglett.1c03101] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A highly diastereo- and enantioselective allylation of isatins with 3-substituted allylboronic compounds was achieved by the chiral N,N'-dioxide/Lu(OTf)3 complex. This approach provides an efficient route to useful enantioenriched 3-allyl-3-hydroxyoxindoles with adjacent tetrasubstituted tertiary or tetrasubstituted quaternary stereogenic centers. Density functional theory calculations were performed to understand the different diastereoselection between the background reaction and catalytic process. Moreover, allylation with potassium allyltrifluoroborate was accomplished by the chiral N,N'-dioxide/In(OTf)3 complex. The synthetic utility was demonstrated by further transformation of the product to a tetrahydrofuranyl oxindole derivative.
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Affiliation(s)
- Xiaoxue Tang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Liqiao Yan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Qiong Tang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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60
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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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61
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Ullrich P, Schlamkow MA, Choi C, Kerkenpaß H, Henßen B, Pietruszka J. Enantioselective Allylation of Cyclic and
In Situ
Formed
N
‐Unsubstituted Imines with Tetraol‐Protected Allylboronates. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Patrick Ullrich
- Institut für Bioorganische Chemie (IBOC) Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, and Bioeconomy Science Center (BioSC) Geb. 15.8 52426 Jülich Germany
| | - Max A. Schlamkow
- Institut für Bio- und Geowissenschaften (IBG-1: Bioorganische Chemie) Forschungszentrum Jülich 52428 Jülich Germany
| | - Ching‐Yi Choi
- Institut für Bioorganische Chemie (IBOC) Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, and Bioeconomy Science Center (BioSC) Geb. 15.8 52426 Jülich Germany
| | - Hannah Kerkenpaß
- Institut für Bio- und Geowissenschaften (IBG-1: Bioorganische Chemie) Forschungszentrum Jülich 52428 Jülich Germany
| | - Birgit Henßen
- Institut für Bioorganische Chemie (IBOC) Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, and Bioeconomy Science Center (BioSC) Geb. 15.8 52426 Jülich Germany
- Institut für Bio- und Geowissenschaften (IBG-1: Bioorganische Chemie) Forschungszentrum Jülich 52428 Jülich Germany
| | - Jörg Pietruszka
- Institut für Bioorganische Chemie (IBOC) Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, and Bioeconomy Science Center (BioSC) Geb. 15.8 52426 Jülich Germany
- Institut für Bio- und Geowissenschaften (IBG-1: Bioorganische Chemie) Forschungszentrum Jülich 52428 Jülich Germany
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62
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Lee Y, Han S, Cho SH. Catalytic Chemo- and Enantioselective Transformations of gem-Diborylalkanes and (Diborylmethyl)metallic Species. Acc Chem Res 2021; 54:3917-3929. [PMID: 34612034 DOI: 10.1021/acs.accounts.1c00455] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chemo- and stereoselective transformations of polyborylalkanes are powerful and efficient methods to access optically active molecules with greater complexity and diversity through programmed synthetic design. Among the various polyborylalkanes, gem-diborylalkanes have attracted much attention in organic chemistry as versatile synthetic handles. The notable advantage of gem-diborylalkanes lies in their ability to generate two key intermediates, α-borylalkyl anions and (gem-diborylalkyl) anions. These two different intermediates can be applied to various enantioselective reactions to rapidly access a diverse set of enantioenriched organoboron compounds, which can be further manipulated to generate various chiral molecule libraries via stereospecific C(sp3)-B bond transformations.In this Account, we summarize our recent contributions to the development of catalytic chemo- and stereoselective reactions using gem-diborylalkanes as versatile nucleophiles, which can be categorized as follows: (1) copper-catalyzed enantioselective coupling of gem-diborylalkanes with electrophiles and (2) the design and synthesis of (diborylmethyl)metallic species and their applications to enantioselective reactions. Since Shibata and Endo reported the Pd-catalyzed chemoselective Suzuki-Miyaura cross-coupling of gem-diborylalkanes with organohalides in 2014, Morken and Hall subsequently developed the first enantioselective analogous reactions using TADDOL-derived chiral phosphoramidite as the supporting ligand of a palladium catalyst. This discovery sparked interest in the catalytic enantioselective coupling of gem-diborylalkanes with electrophiles. Our initial studies focused on generating chiral (α-borylmethyl)copper species by enantiotopic-group-selective transmetalation of gem-diborylalkanes with chiral copper complexes and their reactions with various aldimines and ketimines to afford syn-β-aminoboronate esters with excellent enantio- and diastereoselectivity. Moreover, we developed the enantioselective allylation of gem-diborylalkanes that proceeded by reaction of in situ-generated chiral (α-borylalkyl)copper and allyl bromides. Mechanistic investigations revealed that the enantiotopic-group-selective transmetalation between gem-diborylalkanes and the chiral copper complex occurred through the open transition state rather than the closed transition state, thereby effectively generating chiral (α-borylmethyl)copper species. We also utilized (diborylmethyl)metallic species such as (diborylmethyl)silanes and (diborylmethyl)zinc halides in catalytic enantioselective reactions. We succeeded in developing the enantiotopic-group-selective cross-coupling of (diborylmethyl)silanes with aryl iodides to afford enantioenriched benzylic 1,1-silylboronate esters, which could be used for further consecutive stereospecific transformations to afford various enantioenriched molecules. In addition, we synthesized (diborylmethyl)zinc halides for the first time by the transmetalation of isolated (diborylmethyl)lithium and zinc(II) halides and their utilization to the synthesis of enantioenriched gem-diborylalkanes bearing a chiral center at the β-position via an iridium-catalyzed enantioselective allylic substitution process. In addition to our research efforts, we also include key contributions by other research groups. We hope that this Account will draw the attention of the synthetic community to gem-diboryl compounds and provide guiding principles for the future development of catalytic enantioselective reactions using gem-diboryl compounds.
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Affiliation(s)
- Yeosan Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seungcheol Han
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seung Hwan Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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63
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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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64
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Kamoshita S, Matsui S, Suto N, Sakurai K. Reactivity Analysis of New Multivalent Electrophilic Probes for Affinity Labeling of Carbohydrate Binding Proteins. Chembiochem 2021; 23:e202100388. [PMID: 34490706 DOI: 10.1002/cbic.202100388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/05/2021] [Indexed: 11/07/2022]
Abstract
We have designed and synthesized six different multivalent electrophiles as carbohydrate affinity labeling probes. Evaluation of the reactivity of the electrophiles against peanut agglutinin (PNA) and Ricinus communis agglutinin (RCA) showed that p- and m-aryl sulfonyl fluoride are effective protein reactive groups that label carbohydrate binding lectins in a ligand-dependent fashion at a nanomolar probe concentration. Analysis of the selectivity of affinity labeling in the presence of excess BSA as a nonspecific protein indicated that m-arylsulfonyl fluoride is a more selective protein-reactive group, albeit with attenuated reactivity. Further analysis showed that the labeling efficiency of the multivalent electrophilic probes can be improved by employing reaction conditions involving 25 °C instead of typically employed 4 °C. Both isomers of arylsulfonyl fluoride groups together represent promising affinity labels for target identification studies that could serve as more efficient alternatives to photoreactive groups.
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Affiliation(s)
- Shione Kamoshita
- Department of Bioengineering and Life Science, 4-24-16, Naka-cho, Koganei-shi, Tokyo, 184-8588, Japan
| | - Saho Matsui
- Department of Bioengineering and Life Science, 4-24-16, Naka-cho, Koganei-shi, Tokyo, 184-8588, Japan
| | - Nanako Suto
- Department of Bioengineering and Life Science, 4-24-16, Naka-cho, Koganei-shi, Tokyo, 184-8588, Japan
| | - Kaori Sakurai
- Department of Bioengineering and Life Science, 4-24-16, Naka-cho, Koganei-shi, Tokyo, 184-8588, Japan
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65
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Wu J, Wu H, Li X, Liu X, Zhao Q, Huang G, Zhang C. Copper-Catalyzed Highly Selective Protoboration of CF 3 -Containing 1,3-Dienes. Angew Chem Int Ed Engl 2021; 60:20376-20382. [PMID: 34146388 DOI: 10.1002/anie.202105896] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/02/2021] [Indexed: 12/15/2022]
Abstract
The copper-catalyzed highly selective protoboration of CF3 -containing conjugated diene with proton source and B2 Pin2 has been developed. This chemistry could suppress the well-known defluorination and provide borated reagents with an intact CF3 -group. Further studies indicated that the functional group tolerance of this chemistry is very well, and the products could be used as versatile precursors for different types of transformations. Importantly, using chiral diphosphine ligand, we have developed the first example for using such starting material to synthesis allylic boron-reagents which bearing a CF3 -containing chiral center. Notably, the reaction mechanism was intensively studied by DFT calculations, which could reveal the reason that defluorination was inhibited.
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Affiliation(s)
- Juanjuan Wu
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Hongli Wu
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Xinzhi Li
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Xinyu Liu
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Qian Zhao
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Genping Huang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
| | - Chun Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China
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66
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Wu J, Wu H, Li X, Liu X, Zhao Q, Huang G, Zhang C. Copper‐Catalyzed Highly Selective Protoboration of CF
3
‐Containing 1,3‐Dienes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Juanjuan Wu
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
| | - Hongli Wu
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
| | - Xinzhi Li
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
| | - Xinyu Liu
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
| | - Qian Zhao
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
| | - Genping Huang
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
| | - Chun Zhang
- Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 China
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67
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Ozawa Y, Endo K, Ito H. Regio- and Stereoselective Synthesis of Multi-Alkylated Allylic Boronates through Three-Component Coupling Reactions between Allenes, Alkyl Halides, and a Diboron Reagent. J Am Chem Soc 2021; 143:13865-13877. [PMID: 34424698 DOI: 10.1021/jacs.1c06538] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Multisubstituted allylic boronates are attractive and valuable precursors for the rapid and stereoselective construction of densely substituted carbon skeletons. Herein, we report the first synthetic approach for differentially 2,3,3-trialkyl-substituted allylic boronates that contain a stereodefined tetrasubstituted alkene structure. Copper(I)-catalyzed regio- and stereoselective three-component coupling reactions between gem-dialkylallenes, alkyl halides, and a diboron reagent afforded sterically congested allylic boronates. The allylboration of aldehydes diastereoselectively furnished the corresponding homoallylic alcohols that bear a quaternary carbon. A computational study revealed that the selectivity-determining mechanism was correlated to the coordination of a boryl copper(I) species to the allene substrate as well as the borylcupration step.
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Affiliation(s)
- Yu Ozawa
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Kohei Endo
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Hajime Ito
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
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68
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Kirschner S, Yuan K, Ingleson MJ. Haloboration: scope, mechanism and utility. NEW J CHEM 2021; 45:14855-14868. [PMID: 34483652 PMCID: PMC8381870 DOI: 10.1039/d0nj02908d] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/07/2020] [Indexed: 11/21/2022]
Abstract
Haloboration, the addition of B–X (X = Cl, Br, I) across an unsaturated moiety e.g., C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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Y or C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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Y (Y = C, N, etc.), is dramatically less utilised than the ubiquitous hydroboration reaction. However, haloboration of alkynes in particular is a useful tool to access ambiphilic 1,2-disubstituted alkenes. The stereochemical outcome of the reaction is easily controlled and the resulting products have proven to be valuable building blocks in organic synthesis and materials chemistry. This review aims at providing the reader with a brief summary of the historic development and of the current mechanistic understanding of this transformation. Recent developments are discussed and select examples demonstrating the use of haloboration products are given with a focus on the major areas, specifically, natural product synthesis and the development of boron-doped polycyclic aromatic hydrocarbons (B-PAHs). Haloboration is a mostly overlooked technique, yet it is a powerful way of transforming alkynes stereoselectively into difunctionalised ambiphilic alkenes, which readily undergo a plethora of highly useful subsequent reactions.![]()
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Affiliation(s)
- Sven Kirschner
- EaStCHEM School of Chemistry, University of Edinburgh Edinburgh EH9 3FJ UK
| | - Kang Yuan
- EaStCHEM School of Chemistry, University of Edinburgh Edinburgh EH9 3FJ UK
| | - Michael J Ingleson
- EaStCHEM School of Chemistry, University of Edinburgh Edinburgh EH9 3FJ UK
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69
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Nandy S, Paul S, Das KK, Kumar P, Ghorai D, Panda S. Synthesis and reactivity of alkynyl boron compounds. Org Biomol Chem 2021; 19:7276-7297. [PMID: 34374405 DOI: 10.1039/d1ob00465d] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Over the last century, there have been considerable developments in organoboron chemistry due to the stability, non-toxicity, and easy commercial availability of various boronic esters. Several organoboron reagents have emerged and play an increasingly important role in everyday organic synthesis. Among them, alkynyl boron compounds have attracted significant attention due to their easy synthesis and diverse reactivity. In this review, we summarize the advancement of research on alkynyl boron compounds, highlighting their importance in the synthesis of valuable compounds.
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Affiliation(s)
- Soumilee Nandy
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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70
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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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71
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Ming W, Liu X, Mao L, Gu X, Ye Q. Transition‐Metal‐Catalyzed
Synthesis of Chiral Allylboronates
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000708] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Wenbo Ming
- Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China
| | - Xiaocui Liu
- Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China
| | - Lujia Mao
- Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China
| | - Xiao Gu
- Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China
| | - Qing Ye
- Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China
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72
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Tsuji H, Hamaguchi T, Kawatsura M. Nickel-catalyzed Markovnikov 1,2-Hydroboration of In Situ Generated 1,3-Dienes Using a Secondary Homoallylic Carbonate as the 1,3-Diene and Hydride Source. CHEM LETT 2021. [DOI: 10.1246/cl.210051] [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)
- Hiroaki Tsuji
- Department of Chemistry, College of Humanities & Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
| | - Takashi Hamaguchi
- Department of Chemistry, College of Humanities & Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
| | - Motoi Kawatsura
- Department of Chemistry, College of Humanities & Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan
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73
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Iwamoto H, Ozawa Y, Takenouchi Y, Imamoto T, Ito H. Backbone-Modified C2-Symmetrical Chiral Bisphosphine TMS-QuinoxP*: Asymmetric Borylation of Racemic Allyl Electrophiles. J Am Chem Soc 2021; 143:6413-6422. [PMID: 33891398 DOI: 10.1021/jacs.0c08899] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A new C2-symmetrical P-chirogenic bisphosphine ligand with silyl substituents on the ligand backbone, (R,R)-5,8-TMS-QuinoxP*, has been developed. This ligand showed higher reactivity and enantioselectivity for the direct enantioconvergent borylation of cyclic allyl electrophiles than its parent ligand, (R,R)-QuinoxP* (e.g., for a piperidine-type substrate: 95% ee vs 76% ee). The borylative kinetic resolution of linear allyl electrophiles was also achieved using (R,R)-5,8-TMS-QuinoxP* (up to 90% ee, s = 46.4). An investigation into the role of the silyl groups on the ligand backbone using X-ray crystallography and computational studies displayed interlocking structures between the phosphine and silyl moieties of (R,R)-5,8-TMS-QuinoxP*. The results of DFT calculations revealed that the entropy effect thermodynamically destabilizes the dormant dimer species in the catalytic cycle to improve the reactivity. Furthermore, in the direct enantioconvergent case, detailed calculations indicated a pronounced enantioselective recognition of carbon-carbon double bonds, which is virtually unaffected by the chirality at the allylic position, as a key for the borylation from both enantiomers of racemic allyl electrophiles.
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Affiliation(s)
- Hiroaki Iwamoto
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Yu Ozawa
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Yuta Takenouchi
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Tsuneo Imamoto
- Organic R&D Department, Nippon Chemical Industrial Co., Ltd., Kameido, Koto-Ku, Tokyo 136-8515, Japan.,Department of Chemistry, Graduate School of Science, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Hajime Ito
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
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74
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Hari DP, Madhavachary R, Fasano V, Haire J, Aggarwal VK. Highly Diastereoselective Strain-Increase Allylborations: Rapid Access to Alkylidenecyclopropanes and Alkylidenecyclobutanes. J Am Chem Soc 2021; 143:7462-7470. [PMID: 33950678 DOI: 10.1021/jacs.1c01966] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Allylboration of carbonyl compounds is one of the most widely used methods in the stereoselective synthesis of natural products. However, these powerful transformations are so far limited to allyl- or crotylboron reagents; ring-strained substituents in the α-position have not been investigated. Such substrates would lead to an increase in strain energy upon allylboration and as such cause a significant increase in the activation barrier of the reaction. Indeed, no reaction was observed between an α-cyclopropyl allylboronic ester and an aldehyde. However, by converting the boronic ester into the much more reactive borinic ester, the allylboration proceeded well giving alkylidenecyclopropanes in high yield. This process was highly diastereoselective and gives rapid access to versatile alkylidenecyclopropanes and alkylidenecyclobutanes. The chemistry shows a broad substrate scope in terms of both the range of vinylcycloalkyl boronic esters and aldehydes that can be employed. The intermediate boronate complexes were also found to be potent nucleophiles, reacting with a range of non-carbonyl-based electrophiles and radicals, leading to an even broader range of alkylidenecyclopropanes and alkylidenecyclobutanes. Using 11B NMR experiments, we were able to track the intermediates involved, and DFT calculations supported the experimental findings.
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Affiliation(s)
- Durga Prasad Hari
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | | | - Valerio Fasano
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Jack Haire
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
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75
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Pàmies O, Margalef J, Cañellas S, James J, Judge E, Guiry PJ, Moberg C, Bäckvall JE, Pfaltz A, Pericàs MA, Diéguez M. Recent Advances in Enantioselective Pd-Catalyzed Allylic Substitution: From Design to Applications. Chem Rev 2021; 121:4373-4505. [PMID: 33739109 PMCID: PMC8576828 DOI: 10.1021/acs.chemrev.0c00736] [Citation(s) in RCA: 212] [Impact Index Per Article: 70.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 12/30/2022]
Abstract
This Review compiles the evolution, mechanistic understanding, and more recent advances in enantioselective Pd-catalyzed allylic substitution and decarboxylative and oxidative allylic substitutions. For each reaction, the catalytic data, as well as examples of their application to the synthesis of more complex molecules, are collected. Sections in which we discuss key mechanistic aspects for high selectivity and a comparison with other metals (with advantages and disadvantages) are also included. For Pd-catalyzed asymmetric allylic substitution, the catalytic data are grouped according to the type of nucleophile employed. Because of the prominent position of the use of stabilized carbon nucleophiles and heteronucleophiles, many chiral ligands have been developed. To better compare the results, they are presented grouped by ligand types. Pd-catalyzed asymmetric decarboxylative reactions are mainly promoted by PHOX or Trost ligands, which justifies organizing this section in chronological order. For asymmetric oxidative allylic substitution the results are grouped according to the type of nucleophile used.
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Affiliation(s)
- Oscar Pàmies
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
| | - Jèssica Margalef
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
| | - Santiago Cañellas
- Discovery
Sciences, Janssen Research and Development, Janssen-Cilag, S.A. Jarama 75A, 45007, Toledo, Spain
| | - Jinju James
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eric Judge
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Christina Moberg
- KTH
Royal Institute of Technology, Department of Chemistry, Organic Chemistry, SE 100 44 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE 106 91 Stockholm, Sweden
| | - Andreas Pfaltz
- Department
of Chemistry, University of Basel. St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona. 08028 Barcelona, Spain
| | - Montserrat Diéguez
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
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76
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Xu N, Xu J, Zhu Q, Liu C. Synthesis of Allylboronates via Zweifel‐type Deprotonative Olefination. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nuo Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation & CAS Key Laboratory of Chemistry of Northwestern Plant Resources Suzhou Research Institute Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049
| | - Jianeng Xu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation & CAS Key Laboratory of Chemistry of Northwestern Plant Resources Suzhou Research Institute Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049
| | - Qing Zhu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation & CAS Key Laboratory of Chemistry of Northwestern Plant Resources Suzhou Research Institute Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation & CAS Key Laboratory of Chemistry of Northwestern Plant Resources Suzhou Research Institute Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China
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77
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78
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Dhakshinamoorthy A, García CV, Concepcion P, Garcia H. Arene borylation through C H activation using Cu3(BTC)2 as heterogeneous catalyst. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.06.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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79
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80
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Kim M, Lee JH, Cho SH. Pd‐Catalyzed Negishi Cross‐Coupling of Vinyl Bromides with Diborylmethylzinc Chloride. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12212] [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)
- Minjae Kim
- Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Jun Hee Lee
- Department of Advanced Materials Chemistry Dongguk University Gyeongju Campus Gyeongju 38066 Republic of Korea
| | - Seung Hwan Cho
- Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
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81
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Guo K, Kleij AW. Copper-Mediated Dichotomic Borylation of Alkyne Carbonates: Stereoselective Access to (E)-1,2-Diborylated 1,3-Dienes versus Traceless Monoborylation Affording α-Hydroxyallenes. Angew Chem Int Ed Engl 2021; 60:4901-4906. [PMID: 33230901 DOI: 10.1002/anie.202014310] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Indexed: 11/09/2022]
Abstract
A mild copper-mediated protocol has been developed for borylation of alkynyl cyclic carbonates. Depending on the nature of the borylating reaction partner, either stereoselective diborylation of the propargylic surrogate takes place, providing convenient access to (E)-1,2-borylated 1,3-dienes, or traceless monoborylation occurs, which leads to α-hydroxyallenes as the principal product. The dichotomy in this borylation protocol has been scrutinized by several control experiments, illustrating that a relatively small change in the diboron(4) reagent allows for competitive alcohol-assisted protodemetalation to forge an α-hydroxyallene product under ambient conditions.
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Affiliation(s)
- Kun Guo
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Arjan W Kleij
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Catalan Institute of Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010, Barcelona, Spain
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82
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Guo K, Kleij AW. Copper‐Mediated Dichotomic Borylation of Alkyne Carbonates: Stereoselective Access to (
E
)‐1,2‐Diborylated 1,3‐Dienes versus Traceless Monoborylation Affording α‐Hydroxyallenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Kun Guo
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Arjan W. Kleij
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institute of Research and Advanced Studies (ICREA) Pg. Lluís Companys 23 08010 Barcelona Spain
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83
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Zhao Y, Ge S. Chromium-Catalyzed Selective Dimerization/Hydroboration of Allenes to Access Boryl-Functionalized Skipped (E,Z)-Dienes. Angew Chem Int Ed Engl 2021; 60:2149-2154. [PMID: 33027539 DOI: 10.1002/anie.202012344] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Indexed: 11/10/2022]
Abstract
A chromium-catalyzed dimerization/hydroboration of allenes is developed to access synthetically versatile boryl-functionalized skipped dienes with a catalyst generated in situ from CrCl2 and a pyridine-2,6-diimine ligand mes PDI. A variety of allenes reacted with pinacolborane (HBpin) to afford the corresponding boryl-functionalized (E,Z)-1,4-dienes in high yields and with excellent selectivity. Electron paramagnetic resonance (EPR) spectroscopic studies suggest that this chromium-catalyzed reaction probably proceeds through a chromium(I) hydride intermediate.
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Affiliation(s)
- Yinsong Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Shaozhong Ge
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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84
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Dong G, Bao M, Xie X, Jia S, Hu W, Xu X. Asymmetric Allylation by Chiral Organocatalyst‐Promoted Formal Hetero‐Ene Reactions of Alkylgold Intermediates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012678] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Guizhi Dong
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Ming Bao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Xiongda Xie
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Shikun Jia
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Wenhao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Xinfang Xu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
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85
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Zhao Y, Ge S. Chromium‐Catalyzed Selective Dimerization/Hydroboration of Allenes to Access Boryl‐Functionalized Skipped (
E
,
Z
)‐Dienes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012344] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yinsong Zhao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Shaozhong Ge
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
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86
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Miura T, Oku N, Shiratori Y, Nagata Y, Murakami M. Stereo- and Enantioselective Synthesis of Propionate-Derived Trisubstituted Alkene Motifs. Chemistry 2021; 27:3861-3868. [PMID: 33277755 DOI: 10.1002/chem.202004930] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/03/2020] [Indexed: 12/14/2022]
Abstract
We report a new method for constructing propionate-derived trisubstituted alkene motifs in a stereoselective manner. 1-Substituted 1,1-di(pinacolatoboryl)-(E)-alk-2-enes are generated in situ from 1-substituted 1,1-di(pinacolatoboryl)alk-3-enes through ruthenium(II)-catalyzed double-bond transposition. These species undergo a chiral phosphoric acid catalyzed allylation reaction of aldehydes to produce the E isomers of anti-homoallylic alcohols. On the other hand, the corresponding Z isomers of anti-homoallylic alcohols are obtained when a dimeric palladium(I) complex is employed as the catalyst for this double-bond transposition. Thus, both E and Z isomers can be synthesized from the same starting materials. A B-C(sp2 ) bond remaining with the allylation product undergoes the Suzuki-Miyaura cross-coupling reaction to furnish a propionate-derived trisubstituted alkene motif in a stereo-defined form. The present method to construct the motifs with (E)- and (Z)-alkenes are successfully applied to the syntheses of (+)-isotrichostatic acid, (-)-isotrichostatin RK, and (+)-trichostatic acid, respectively.
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Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Naoki Oku
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Yota Shiratori
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Yuuya Nagata
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
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87
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Kim M, Park B, Shin M, Kim S, Kim J, Baik MH, Cho SH. Copper-Catalyzed Enantiotopic-Group-Selective Allylation of gem-Diborylalkanes. J Am Chem Soc 2021; 143:1069-1077. [DOI: 10.1021/jacs.0c11750] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Minjae Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Bohyun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Minkyeong Shin
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Suyeon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Junghoon Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Seung Hwan Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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88
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Miura H, Hachiya Y, Nishio H, Fukuta Y, Toyomasu T, Kobayashi K, Masaki Y, Shishido T. Practical Synthesis of Allyl, Allenyl, and Benzyl Boronates through S N1′-Type Borylation under Heterogeneous Gold Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.0c03771] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Hiroki Miura
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Yuka Hachiya
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Hidenori Nishio
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Yohei Fukuta
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Tomoya Toyomasu
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Kosa Kobayashi
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Yosuke Masaki
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Tetsuya Shishido
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Gold Chemistry, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
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89
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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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90
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Hu H, Xu WH, Kang WX, Sun W, Sun R, Wei XH, Sun M. Co( iii)-Catalyzed stereospecific synthesis of ( E)-homoallylic alcohols with 4-vinyl-1,3-dioxan-2-ones: late-stage C–H homoallylation of indole derivatives. Org Chem Front 2021. [DOI: 10.1039/d1qo00529d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
An Co(iii)-catalyzed stereoselective C–H homoallylation reaction to access (E)-homoallylic alcohols was developed. This protocol provides a powerful approach for the late-stage C–H homoallylation of indole-based molecules.
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Affiliation(s)
- Hong Hu
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- China
| | - Wen-Hua Xu
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- China
| | - Wu-Xiang Kang
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- China
| | - Wei Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- China
| | - Rui Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- China
| | - Xiao-Hong Wei
- College of Chemical Engineering
- Northwest Minzu University
- Lanzhou 730030
- China
| | - Meng Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- China
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91
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Zhang P, Zou C, Zhao Q, Zhang C. Nickel-catalyzed alkenylboration of alkenylarenes to access homoallylic boronic esters. Org Chem Front 2021. [DOI: 10.1039/d1qo00100k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A practical nickel-catalyzed alkenylboration of alkenylarenes with excellent chemo- and regio-selectivity has been developed.
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Affiliation(s)
- Penglin Zhang
- Institute of Molecular Plus
- Tianjin Key Laboratory of Molecular Optoelectronic Science
- Department of Chemistry
- School of Sciences
- Tianjin University
| | - Chenchen Zou
- Institute of Molecular Plus
- Tianjin Key Laboratory of Molecular Optoelectronic Science
- Department of Chemistry
- School of Sciences
- Tianjin University
| | - Qian Zhao
- Institute of Molecular Plus
- Tianjin Key Laboratory of Molecular Optoelectronic Science
- Department of Chemistry
- School of Sciences
- Tianjin University
| | - Chun Zhang
- Institute of Molecular Plus
- Tianjin Key Laboratory of Molecular Optoelectronic Science
- Department of Chemistry
- School of Sciences
- Tianjin University
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92
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Pei G, Chen H, Xu W, Chen T, Li J. Diboron-controlled product selectivity switch in copper-catalyzed decarboxylative substitutions of alkynyl cyclic carbonates. Org Chem Front 2021. [DOI: 10.1039/d1qo01411k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
DFT calculations were performed to explore the mechanisms, origins of diboron-controlled divergent product selectivity and stereoselectivity in the copper-catalyzed decarboxylative substitution of alkynyl cyclic carbonates.
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Affiliation(s)
- Guojing Pei
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Hui Chen
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Wan Xu
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
| | - Tao Chen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Juan Li
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632, P. R. China
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93
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Jonker SJT, Jayarajan R, Kireilis T, Deliaval M, Eriksson L, Szabó KJ. Organocatalytic Synthesis of α-Trifluoromethyl Allylboronic Acids by Enantioselective 1,2-Borotropic Migration. J Am Chem Soc 2020; 142:21254-21259. [PMID: 33270462 PMCID: PMC7760092 DOI: 10.1021/jacs.0c09923] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
![]()
Chiral α-substituted allylboronic
acids were synthesized
by asymmetric homologation of alkenylboronic acids using CF3/TMS-diazomethanes in the presence of BINOL catalyst and ethanol.
The chiral α-substituted allylboronic acids were reacted with
aldehydes or oxidized to alcohols in situ with a high degree of chirality
transfer. The oxygen-sensitive allylboronic acids can be purified
via their isolated diaminonaphthalene (DanH)-protected derivatives.
The highly reactive purified allylboronic acids reacted in a self-catalyzed
reaction at room temperature with ketones, imines, and indoles to
give congested trifluoromethylated homoallylic alcohols/amines with
up to three contiguous stereocenters.
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Affiliation(s)
- Sybrand J T Jonker
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Ramasamy Jayarajan
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Tautvydas Kireilis
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Marie Deliaval
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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94
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Zhu C, Gao S, Li W, Zhu C. Photoredox radical borylation of electron-deficient alkenes with NHC-boranes. Chem Commun (Camb) 2020; 56:15647-15650. [PMID: 33284913 DOI: 10.1039/d0cc06966c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An efficient photoredox radical borylation of electron-deficient Morita-Baylis-Hillman type alkenes is achieved to afford multi-functionalized allylic boranes. The reaction demonstrates a wide substrate scope and showcases excellent functional group tolerance. It has advantages over the traditional ionic hydroboration methods in the construction of allylic boranes in terms of simple operation, mild conditions, and step-economy.
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Affiliation(s)
- Congjun Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
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95
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Hu P, Peters BK, Malapit CA, Vantourout JC, Wang P, Li J, Mele L, Echeverria PG, Minteer SD, Baran PS. Electroreductive Olefin-Ketone Coupling. J Am Chem Soc 2020; 142:20979-20986. [PMID: 33259715 DOI: 10.1021/jacs.0c11214] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A user-friendly approach is presented to sidestep the venerable Grignard addition to unactivated ketones to access tertiary alcohols by reversing the polarity of the disconnection. In this work a ketone instead acts as a nucleophile when adding to simple unactivated olefins to accomplish the same overall transformation. The scope of this coupling is broad as enabled using an electrochemical approach, and the reaction is scalable, chemoselective, and requires no precaution to exclude air or water. Multiple applications demonstrate the simplifying nature of the reaction on multistep synthesis, and mechanistic studies point to an intuitive mechanism reminiscent of other chemical reductants such as SmI2 (which cannot accomplish the same reaction).
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Affiliation(s)
- Pengfei Hu
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Byron K Peters
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Christian A Malapit
- Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City 84112, Utah, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Julien C Vantourout
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Pan Wang
- Center for Excellence of Process Science, Asymchem Laboratories (Tianjin) Co., Ltd. TEDA, Tianjin 300457, P. R. China
| | - Jinjun Li
- Center for Excellence of Process Science, Asymchem Laboratories (Tianjin) Co., Ltd. TEDA, Tianjin 300457, P. R. China
| | - Lucas Mele
- Minakem Recherche, 145 Chemin des Lilas, Beuvry-la-Forêt 59310, France
| | | | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City 84112, Utah, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Phil S Baran
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
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96
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Liu J, Bäckvall J. Efficient Palladium-Catalyzed Aerobic Oxidative Carbocyclization to Seven-Membered Heterocycles. Chemistry 2020; 26:15513-15518. [PMID: 32960479 PMCID: PMC7894550 DOI: 10.1002/chem.202004265] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Indexed: 11/09/2022]
Abstract
The use of molecular oxygen in palladium-catalyzed oxidation reactions is highly widespread in organic chemistry. However, the direct reoxidation of palladium by O2 is often kinetically unfavored, thus leading the deactivation of the palladium catalyst during the catalytic cycle. In the present work, we report a highly selective palladium-catalyzed carbocyclization of bisallenes to seven-membered heterocycles under atmospheric pressure of O2 . The use of a homogenous hybrid catalyst (Co(salophen)-HQ, HQ=hydroquinone) significantly promotes efficient electron transfer between the palladium catalyst and O2 through a low-energy pathway. This aerobic oxidative transformation shows broad substrate scope and functional group compatibility and allowed the preparation of O-containing seven-membered rings in good yields in most cases.
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Affiliation(s)
- Jie Liu
- Department of Organic ChemistryArrhenius LaboratoryStockholm University10691StockholmSweden
- College of Chemistry and Chemical EngineeringHunan University410082ChangshaP. R. China
| | - Jan‐E. Bäckvall
- Department of Organic ChemistryArrhenius LaboratoryStockholm University10691StockholmSweden
- Department of Natural SciencesMid Sweden UniversityHolmgatan 1085170SundsvallSweden
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97
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Dong G, Bao M, Xie X, Jia S, Hu W, Xu X. Asymmetric Allylation by Chiral Organocatalyst‐Promoted Formal Hetero‐Ene Reactions of Alkylgold Intermediates. Angew Chem Int Ed Engl 2020; 60:1992-1999. [DOI: 10.1002/anie.202012678] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 09/30/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Guizhi Dong
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Ming Bao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Xiongda Xie
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Shikun Jia
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Wenhao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
| | - Xinfang Xu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 P. R. China
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98
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Zhang P, Zhang M, Ji Y, Xing M, Zhao Q, Zhang C. Nickel-Catalyzed Highly Selective Hydroalkenylation of Alkenyl Boronic Esters to Access Allyl Boron. Org Lett 2020; 22:8285-8290. [PMID: 33089688 DOI: 10.1021/acs.orglett.0c02923] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Allyl boron derivatives are valuable building blocks in the synthesis of natural products and bioactive molecules. Herein, a practical strategy of nickel-catalyzed highly selective hydroalkenylation of alkenyl boronic esters was developed. Under the mild reaction conditions, a variety of allyl boronic esters were accessed with excellent chemo- and regioselectivity. The mechanism of this transformation was illustrated by control experiments and kinetic studies.
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Affiliation(s)
- Penglin Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Min Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Yuqi Ji
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Mimi Xing
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Qian Zhao
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Chun Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
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99
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Gao S, Duan M, Shao Q, Houk KN, Chen M. Development of α,α-Disubstituted Crotylboronate Reagents and Stereoselective Crotylation via Brønsted or Lewis Acid Catalysis. J Am Chem Soc 2020; 142:18355-18368. [PMID: 33052047 DOI: 10.1021/jacs.0c04107] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The development of α,α-disubstituted crotylboronate reagents is reported. Chiral Brønsted acid-catalyzed asymmetric aldehyde addition with the developed E-crotylboron reagent gave (E)-anti-1,2-oxaborinan-3-enes with excellent enantioselectivities and E-selectivities. With BF3·OEt2 catalysis, the stereoselectivity is reversed, and (Z)-δ-boryl-anti-homoallylic alcohols are obtained with excellent Z-selectivities from the same E-crotylboron reagent. The Z-crotylboron reagent also participates in BF3·OEt2-catalyzed crotylation to furnish (Z)-δ-boryl-syn-homoallylic alcohols with good Z-selectivities. DFT computations establish the origins of observed enantio- and stereoselectivities of chiral Brønsted acid-catalyzed asymmetric allylation. Stereochemical models for BF3·OEt2-catalyzed reactions are proposed to rationalize the Z-selective allyl additions. These reactions generate highly valuable homoallylic alcohol products with a stereodefined trisubstituted alkene unit. The synthetic utility is further demonstrated by the total syntheses of salinipyrones A and B.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Meng Duan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Qianzhen Shao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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100
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Fasano V, McFord AW, Butts CP, Collins BSL, Fey N, Alder RW, Aggarwal VK. How Big is the Pinacol Boronic Ester as a Substituent? Angew Chem Int Ed Engl 2020; 59:22403-22407. [DOI: 10.1002/anie.202007776] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 08/20/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Valerio Fasano
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Aidan W. McFord
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Craig P. Butts
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | | | - Natalie Fey
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Roger W. Alder
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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