1
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Lou X, Lin J, Kwok CY, Lyu H. Stereoselective Unsymmetrical 1,1-Diborylation of Alkynes with a Neutral sp 2 -sp 3 Diboron Reagent. Angew Chem Int Ed Engl 2023; 62:e202312633. [PMID: 37822069 DOI: 10.1002/anie.202312633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 10/13/2023]
Abstract
The incorporation of two distinct boryl groups at the same carbon center in organic molecules has attracted growing research interest due to its potential for facilitating controlled, precise synthesis through stepwise dual carbon-boron bond transformations. Here we report a method to access unsymmetrical 1,1-diborylalkene (UDBA) stereoselectively via the reaction of readily available alkynes with a neutral sp2 -sp3 diboron reagent (NHC)BH2 -Bpin (NHC=N-heterocyclic carbene). Attributing to the chemically easily distinguishable nature of the sp2 and sp3 boryl moieties, controllable stepwise derivatization of the resultant UDBAs is realized. This process leads to various multifunctionalized olefins and organoborons, such as acylboranes, which are difficult to prepare by other methods.
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Affiliation(s)
- Xiangyu Lou
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China
| | - Jiaxin Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Chun Yin Kwok
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China
| | - Hairong Lyu
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China
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2
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Corpas J, Gomez-Mendoza M, Arpa EM, de la Peña
O'Shea VA, Durbeej B, Carretero JC, Mauleón P, Arrayás R. Iterative Dual-Metal and Energy Transfer Catalysis Enables Stereodivergence in Alkyne Difunctionalization: Carboboration as Case Study. ACS Catal 2023; 13:14914-14927. [PMID: 38026817 PMCID: PMC10662505 DOI: 10.1021/acscatal.3c03570] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/04/2023] [Indexed: 12/01/2023]
Abstract
Stereochemically defined tetrasubstituted olefins are widespread structural elements of organic molecules and key intermediates in organic synthesis. However, flexible methods enabling stereodivergent access to E and Z isomers of fully substituted alkenes from a common precursor represent a significant challenge and are actively sought after in catalysis, especially those amenable to complex multifunctional molecules. Herein, we demonstrate that iterative dual-metal and energy transfer catalysis constitutes a unique platform for achieving stereodivergence in the difunctionalization of internal alkynes. The utility of this approach is showcased by the stereodivergent synthesis of both stereoisomers of tetrasubstituted β-boryl acrylates from internal alkynoates with excellent stereocontrol via sequential carboboration and photoisomerization. The reluctance of electron-deficient internal alkynes to undergo catalytic carboboration has been overcome through cooperative Cu/Pd-catalysis, whereas an Ir complex was identified as a versatile sensitizer that is able to photoisomerize the resulting sterically crowded alkenes. Mechanistic studies by means of quantum-chemical calculations, quenching experiments, and transient absorption spectroscopy have been applied to unveil the mechanism of both steps.
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Affiliation(s)
- Javier Corpas
- Department of Organic Chemistry, Faculty of Science;
Institute for Advanced Research in Chemical Sciences (IAdChem); and Centro de
Innovación en Química Avanzada (ORFEO−CINQA),
Universidad Autónoma de Madrid (UAM), Cantoblanco,
28049 Madrid, Spain
| | - Miguel Gomez-Mendoza
- Photoactivated Processes Unit, IMDEA
Energy Institute, Technological Park of Mostoles, Avda. Ramón de la
Sagra 3, 28935 Madrid, Spain
| | - Enrique M. Arpa
- Division of Theoretical Chemistry, IFM,
Linköping University, 581 83 Linköping,
Sweden
| | - Víctor A. de la Peña
O'Shea
- Photoactivated Processes Unit, IMDEA
Energy Institute, Technological Park of Mostoles, Avda. Ramón de la
Sagra 3, 28935 Madrid, Spain
| | - Bo Durbeej
- Division of Theoretical Chemistry, IFM,
Linköping University, 581 83 Linköping,
Sweden
| | - Juan C. Carretero
- Department of Organic Chemistry, Faculty of Science;
Institute for Advanced Research in Chemical Sciences (IAdChem); and Centro de
Innovación en Química Avanzada (ORFEO−CINQA),
Universidad Autónoma de Madrid (UAM), Cantoblanco,
28049 Madrid, Spain
| | - Pablo Mauleón
- Department of Organic Chemistry, Faculty of Science;
Institute for Advanced Research in Chemical Sciences (IAdChem); and Centro de
Innovación en Química Avanzada (ORFEO−CINQA),
Universidad Autónoma de Madrid (UAM), Cantoblanco,
28049 Madrid, Spain
| | - Ramón
Gómez Arrayás
- Department of Organic Chemistry, Faculty of Science;
Institute for Advanced Research in Chemical Sciences (IAdChem); and Centro de
Innovación en Química Avanzada (ORFEO−CINQA),
Universidad Autónoma de Madrid (UAM), Cantoblanco,
28049 Madrid, Spain
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3
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Li Y, Chen Z, Lin S, Liu Y, Qian J, Li Q, Huang Z, Wang H. Regioselective Electrophilic Addition to Propargylic B(MIDA)s Enabled by β-Boron Effect. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304282. [PMID: 37632709 PMCID: PMC10602563 DOI: 10.1002/advs.202304282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Indexed: 08/28/2023]
Abstract
Electrophilic addition reaction to alkynes is of fundamental importance in organic chemistry, yet the regiocontrol when reacting with unsymmetrical 1,2-dialkyl substituted alkynes is often problematic. Herein, it is demonstrated that the rarely recognized β-boron effect can confer a high level of site-selectivity in several alkyne electrophilic addition reactions. A broad range of highly functionalized and complex organoborons are thus formed under simple reaction conditions starting from propargylic MIDA (N-methyliminodiacetic acid) boronates. These products are demonstrated to be valuable building blocks in organic synthesis. In addition to the regiocontrol, this study also observes a drastic rate enhancement upon B(MIDA) substitution. Theoretical calculation reveals that the highest occupied molecular obital (HOMO) energy level of propargylic B(MIDA) is significantly raised by 0.3 eV, and the preferential electrophilic addition to the γ position is due to its higher HOMO orbital coefficient and more negative natural bond orbital (NBO) charge compared to the β position. This study demonstrates the potential of utilizing the β-boron effect in stereoelectronic control of chemical transformations, which can inspire further research in this area.
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Affiliation(s)
- Yin Li
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Zhi‐Hao Chen
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Shuang Lin
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Yuan Liu
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Jiasheng Qian
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Qingjiang Li
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Zhi‐Shu Huang
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
| | - Honggen Wang
- Guangdong Key Laboratory of Chiral Molecule and Drug DiscoverySchool of Pharmaceutical SciencesSun Yat‐Sen UniversityGuangzhou510006China
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4
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Metal-Free One-Pot Multi-Functionalization of Unsaturated Compounds with Interelement Compounds by Radical Process. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020787. [PMID: 36677845 PMCID: PMC9861539 DOI: 10.3390/molecules28020787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/14/2023]
Abstract
In recent years, the importance of "environmentally friendly manufacturing" has been increasing toward the establishment of a resource-recycling society. In organic synthesis, as well, it is becoming increasingly important to develop new synthetic strategies with resource conservation and the recycling of elemental resources in mind, rather than just only synthesis. Many studies on the construction of frameworks of functional molecules using ionic reactions and transition-metal-catalyzed reactions have been reported, but most of them have focused on the formation of carbon-carbon bonds. However, it is essential to introduce appropriate functional groups at appropriate positions in molecules in order for the molecules to express their functions, and furthermore, the highly selective preparation of multiple functional groups is considered important for the creation of new functional molecules. In this review, we focus on radical reactions with high functional group selectivity and overview the recent progress in practical methods for the simultaneous introduction of multiple functional groups and propose future synthetic strategies that emphasize the recycling of elemental resources and environmental friendliness.
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5
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Altarejos J, Valero A, Manzano R, Carreras J. Synthesis of Tri‐ and Tetrasubstituted Alkenyl Boronates from Alkynes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Julia Altarejos
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica SPAIN
| | - Antonio Valero
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica SPAIN
| | - Rubén Manzano
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica SPAIN
| | - Javier Carreras
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica Carretera Madrid-Barcelona km 33,6, Campus Universitario.Facultad de Farmacia 28805 Alcalá de Henares SPAIN
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6
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Ramani A, Desai B, Patel M, Naveen T. Recent advances in the functionalization of terminal and internal alkynes. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Arti Ramani
- Sardar Vallabhbhai National Institute of Technology Department of chemistry INDIA
| | - Bhargav Desai
- Sardar Vallabhbhai National Institute of Technology Department of chemistry INDIA
| | - Monak Patel
- Sardar Vallabhbhai National Institute of Technology Department of chemistry INDIA
| | - Togati Naveen
- SVNIT Surat: Sardar Vallabhbhai National Institute of Technology Applied Chemistry Room No: 115, Applied Chemistry DepartmentSVNIT Surat 395007 SURAT INDIA
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7
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Sasaki I, Maebashi A, Li J, Ohmura T, Suginome M. Synthesis of Disilanes, Dihydrosiloles, and 1,4‐Disilacyclohexa‐2,5‐dienes by Transition‐Metal‐Free Transfer of Diphenylsilylene and Dimethylsilylene from Silylboronic Esters. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ikuo Sasaki
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Synthetic Chemistry and Biological Chemistry A4-302 KatsuraNishikyo-ku 615-8510 Kyoto JAPAN
| | - Asahi Maebashi
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Synthetic Chemistry and Biological Chemistry A4-302 KatsuraNishikyo-ku 615-8510 Kyoto JAPAN
| | - Jiaying Li
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Synthetic Chemistry and Biological Chemistry A4-302 KatsuraNishikyo-ku 615-8510 Kyoto JAPAN
| | - Toshimichi Ohmura
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of E A4-303 Katsura, Nishikyo-ku 615-8510 Kyoto JAPAN
| | - Michinori Suginome
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Synthetic Chemistry and Biological Chemistry A4-306 KatsuraNishikyo-ku 615-8510 Kyoto JAPAN
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8
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Stefanowska K, Sokolnicki T, Walkowiak J, Czapik A, Franczyk A. Directed cis-hydrosilylation of borylalkynes to borylsilylalkenes. Chem Commun (Camb) 2022; 58:12046-12049. [DOI: 10.1039/d2cc04318a] [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
Directed by the choice of catalyst cis-hydrosilylation of borylalkynes leads to novel borylsilylalkenes which are crucial synthons for the introduction of the carbon–carbon double bonds in organic synthesis.
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Affiliation(s)
- Kinga Stefanowska
- Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
| | - Tomasz Sokolnicki
- Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland
| | - Jędrzej Walkowiak
- Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
| | - Agnieszka Czapik
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland
| | - Adrian Franczyk
- Center for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
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9
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Zhang F, Zhou L, Yang K, Song Q. Recent Progress on 1,2-Metallate Shift Reactions Based on Tetracoordinate Boron Intermediates. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202110017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Bose SK, Mao L, Kuehn L, Radius U, Nekvinda J, Santos WL, Westcott SA, Steel PG, Marder TB. First-Row d-Block Element-Catalyzed Carbon-Boron Bond Formation and Related Processes. Chem Rev 2021; 121:13238-13341. [PMID: 34618418 DOI: 10.1021/acs.chemrev.1c00255] [Citation(s) in RCA: 96] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Organoboron reagents represent a unique class of compounds because of their utility in modern synthetic organic chemistry, often affording unprecedented reactivity. The transformation of the carbon-boron bond into a carbon-X (X = C, N, and O) bond in a stereocontrolled fashion has become invaluable in medicinal chemistry, agrochemistry, and natural products chemistry as well as materials science. Over the past decade, first-row d-block transition metals have become increasingly widely used as catalysts for the formation of a carbon-boron bond, a transformation traditionally catalyzed by expensive precious metals. This recent focus on alternative transition metals has enabled growth in fundamental methods in organoboron chemistry. This review surveys the current state-of-the-art in the use of first-row d-block element-based catalysts for the formation of carbon-boron bonds.
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Affiliation(s)
- Shubhankar Kumar Bose
- Centre for Nano and Material Sciences (CNMS), Jain University, Jain Global Campus, Bangalore-562112, India
| | - Lujia Mao
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, 571199 Haikou, Hainan, P. R. China
| | - Laura Kuehn
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Udo Radius
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Jan Nekvinda
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Webster L Santos
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Stephen A Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Patrick G Steel
- Department of Chemistry, University of Durham, Science Laboratories South Road, Durham DH1 3LE, U.K
| | - Todd B Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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11
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Lv Y, Pu W, Zhu X, Chen C, Wang S. Copper-Catalyzed 1,1-Alkylmonofluoroalkylation of Terminal Alkynes with Diazo Compounds and 2-Fluoro-1,3-dicarbonyl Compounds: Access toward ( E)-β-Monofluoroalkyl-β,γ-unsaturated Esters or Ketones. J Org Chem 2021; 86:10043-10054. [PMID: 34313118 DOI: 10.1021/acs.joc.1c00789] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient copper-catalyzed three-component 1,1-alkylmonofluoroalkylation of terminal alkynes, diazo compounds, and 2-fluoro-1,3-dicarbonyl compounds for the synthesis of (E)-β-monofluoroalkyl-β,γ-unsaturated esters or ketones has been developed. The methodology features a broad substrate scope, an inexpensive and easily available catalytic system, and excellent selectivity with good yields. The mechanism of the tandem Cu-catalyzed cross-coupling and nucleophilic addition of allenes has been investigated.
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Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
| | - Weiya Pu
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
| | - Xueli Zhu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Chen Chen
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
| | - Shanshan Wang
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
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12
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Salvado O, Fernández E. A modular olefination reaction between aldehydes and diborylsilylmethide lithium salts. Chem Commun (Camb) 2021; 57:6300-6303. [PMID: 34075958 DOI: 10.1039/d1cc01882e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the preparation of densely functionalised 1,1-silylborylated trisubstituted alkenes, via a boron-Wittig reaction, between LiC(Bpin)2(SiMe3) and aliphatic or aromatic aldehydes. The condensation of diborylsilylmethide lithium salts with α,β-unsaturated aldehydes provides a direct pathway to synthesize 1,1-silylborylated conjugated dienes and diynes.
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Affiliation(s)
- Oriol Salvado
- Dept. Química Física i Inorgànica, University Rovira i Virgili, Tarragona, Spain.
| | - Elena Fernández
- Dept. Química Física i Inorgànica, University Rovira i Virgili, Tarragona, Spain.
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13
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Chen L, Huo JQ, Si HL, Xu XY, Kou S, Mao J, Zhang JL. One-Pot Synthesis of N-H-Free Pyrroles from Aldehydes and Alkynes. Org Lett 2021; 23:4348-4352. [PMID: 34014098 DOI: 10.1021/acs.orglett.1c01287] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first base-mediated intermolecular cyclization of arylaldehydes and terminal arylacetylenes for the synthesis of a wide range of pyrroles in a single step has been described. The developed methodology used commercially available starting materials and tolerated a broad range of functional groups affording 2,3,5-triaryl-substituted-1H-pyrroles with good yields (up to 92% yield) under mild conditions. The possible mechanism was also discussed.
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Affiliation(s)
- Lai Chen
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Jing-Qian Huo
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - He-Long Si
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Xin-Yu Xu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Song Kou
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Jianyou Mao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Jin-Lin Zhang
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
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14
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Li T, Wu Y, Duan W, Ma Y. Silylative aromatization of p-quinone methides under metal and solvent free conditions. RSC Adv 2021; 11:17860-17864. [PMID: 35480172 PMCID: PMC9033227 DOI: 10.1039/d1ra03193g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 05/12/2021] [Indexed: 11/30/2022] Open
Abstract
A base-mediated silylation reaction leading to benzyl silanes has been developed. Under transition-metal and solvent free conditions, the silylation of a wide array of p-quinone methides is achieved using a Cs2CO3 catalyst in yields up to 96%. Carboxylation of the as-obtained organosilane with gaseous CO2 provides a new synthetic protocol for the preparation of carboxylic acid. A novel and efficient synthetic protocol is reported for the synthesis of benzyl silanes from readily available silylborane and p-quinone methides using 5% cesium carbonate under solvent-free conditions.![]()
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Affiliation(s)
- Tingting Li
- Department of Chemistry, Shandong University Shanda South Road No. 27 Jinan 250100 P. R. China
| | - Yuzhu Wu
- Department of Chemistry, Shandong University Shanda South Road No. 27 Jinan 250100 P. R. China
| | - Wenzeng Duan
- School of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 P. R. China
| | - Yudao Ma
- Department of Chemistry, Shandong University Shanda South Road No. 27 Jinan 250100 P. R. China
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15
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Feng JJ, Mao W, Zhang L, Oestreich M. Activation of the Si–B interelement bond related to catalysis. Chem Soc Rev 2021; 50:2010-2073. [DOI: 10.1039/d0cs00965b] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Covering the past seven years, this review comprehensively summarises the latest progress in the preparation and application of Si–B reagents, including the discussion of relevant reaction mechanisms.
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Affiliation(s)
- Jian-Jun Feng
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
- College of Chemistry and Chemical Engineering
| | - Wenbin Mao
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Liangliang Zhang
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Martin Oestreich
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
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16
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Lee H, Cho S, Lee Y, Jung B. Stereoselective Formal Hydroamidation of Si-Substituted Arylacetylenes with DIBAL-H and Isocyanates: Synthesis of ( E)- and ( Z)-α-Silyl-α,β-unsaturated Amides. J Org Chem 2020; 85:12024-12035. [PMID: 32909750 DOI: 10.1021/acs.joc.0c01903] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An efficient and stereoselective method for the synthesis of (E)- and (Z)-α-silyl-α,β-unsaturated amides and its synthetic applications are presented herein. The solvent-controlled hydroaluminations of Si-substituted alkynes with DIBAL-H generate diastereomerically enriched alkenylaluminum reagents that are directly reacted with isocyanates at ambient temperature to afford α-silyl-α,β-unsaturated amides in high yields with retained stereoselectivity. In particular, this process enables the synthesis of a broad range of (E)-α-silyl-α,β-unsaturated amides, which are the less studied isomers. The synthetic utility of this method is highlighted by its short reaction time, ease of purification, easily accessible substrates and reagents, gram-scale synthesis, and the further transformations of C-Si bonds into C-H, C-X, and C-C bonds.
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Affiliation(s)
- Hanseul Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Soohong Cho
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Yunmi Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Byunghyuck Jung
- Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
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17
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Moberg C. Silylboranes as Powerful Tools in Organic Synthesis: Stereo- and Regioselective Reactions with 1,n-Enynes. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Bismetalated alkenes, accessible by element–element addition to alkynes, are valuable building blocks in organic synthesis, providing wide opportunities for divergent synthesis. Silaboration of alkynes with a pendant olefinic group, catalyzed by group 10 metal complexes, and subsequent transformation of the silicon and boron functional groups give access to densely functionalized 1,3-dienes and 1,3,5-trienes with defined stereo- and regiochemistry, 1,2-dienes, and carbocyclic and heterocyclic products.1 Introduction2 Background3 Reactions with 1,3-Enynes4 Cyclization 1,6-Enynes5 Cyclization 1,7-Enynes6 Cyclization of 1,n-Enynes (n > 7)7 Cyclization of Dienynes and Enediynes8 Cyclization of 1,6-Diynes9 Conclusions
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Affiliation(s)
- Christina Moberg
- Department of Chemistry, Organic Chemistry, KTH Royal Institute of Technology
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18
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Liu X, Ming W, Luo X, Friedrich A, Maier J, Radius U, Santos WL, Marder TB. Regio- and Stereoselective Synthesis of 1,1-Diborylalkenes via Brønsted Base-Catalyzed Mixed Diboration of Alkynyl Esters and Amides with BpinBdan. European J Org Chem 2020; 2020:1941-1946. [PMID: 32362780 PMCID: PMC7187442 DOI: 10.1002/ejoc.202000128] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Indexed: 01/06/2023]
Abstract
The NaOtBu-catalyzed mixed 1,1-diboration of terminal alkynes using the unsymmetrical diboron reagent BpinBdan (pin = pinacolato; dan = 1,8-diaminonaphthalene) proceeds in a regio- and stereoselective fashion affording moderate to high yields of 1,1-diborylalkenes bearing orthogonal boron protecting groups. It is applicable to gram-scale synthesis without loss of yield or selectivity. The mixed 1,1-diborylalkene products can be utilized in Suzuki-Miyaura cross-coupling reactions which take place selectivly at the C-B site. DFT calculations suggest the NaOtBu-catalyzed mixed 1,1-diboration of alkynes occurs through deprotonation of the terminal alkyne, stepwise addition of BpinBdan to the terminal carbon followed by protonation with tBuOH. Experimentally observed selective formation of (Z)-diborylalkenes is supported by our theoretical studies.
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Affiliation(s)
- Xiaocui Liu
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
| | - Wenbo Ming
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
| | - Xiaoling Luo
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
- Chongqing Key Laboratory of Inorganic Functional MaterialsCollege of ChemistryChongqing Normal University401331ChongqingChina
| | - Alexandra Friedrich
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
| | - Jan Maier
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
| | - Udo Radius
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
| | - Webster L. Santos
- Department of ChemistryCollege of ChemistryVirginia Tech900 West Campus Drive24061BlacksburgVirginiaUSA
| | - Todd B. Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with BoronJulius‐Maximilians‐Universität WürzburgAm Hubland97074WürzburgGermany
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19
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Lv Y, Pu W, Wang X. Ligand-free copper-catalyzed regio- and stereoselective 1,1-alkylmonofluoroalkylation of terminal alkynes. Chem Commun (Camb) 2020; 56:12933-12936. [DOI: 10.1039/d0cc05887d] [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
A novel copper-catalyzed highly regio- and stereoselective 1,1-alkylmonofluoroalkylation of terminal alkynes without an external ligand has been developed.
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Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- P. R. China
| | - Weiya Pu
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- P. R. China
| | - Xiaoxing Wang
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- P. R. China
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