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Eckert P, Sharif S, Organ MG. Salt to Taste: The Critical Roles Played by Inorganic Salts in Organozinc Formation and in the Negishi Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010917] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Philip Eckert
- Centre for Catalysis Research and Innovation (CCRI) Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N6N5 Canada
| | - Sepideh Sharif
- Centre for Catalysis Research and Innovation (CCRI) Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N6N5 Canada
| | - Michael G. Organ
- Centre for Catalysis Research and Innovation (CCRI) Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N6N5 Canada
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2
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Eckert P, Sharif S, Organ MG. Salt to Taste: The Critical Roles Played by Inorganic Salts in Organozinc Formation and in the Negishi Reaction. Angew Chem Int Ed Engl 2020; 60:12224-12241. [DOI: 10.1002/anie.202010917] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Indexed: 01/06/2023]
Affiliation(s)
- Philip Eckert
- Centre for Catalysis Research and Innovation (CCRI) Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N6N5 Canada
| | - Sepideh Sharif
- Centre for Catalysis Research and Innovation (CCRI) Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N6N5 Canada
| | - Michael G. Organ
- Centre for Catalysis Research and Innovation (CCRI) Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario K1N6N5 Canada
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3
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Balkenhohl M, Jangra H, Makarov IS, Yang S, Zipse H, Knochel P. A Predictive Model Towards Site-Selective Metalations of Functionalized Heterocycles, Arenes, Olefins, and Alkanes using TMPZnCl⋅LiCl. Angew Chem Int Ed Engl 2020; 59:14992-14999. [PMID: 32400069 PMCID: PMC7497272 DOI: 10.1002/anie.202005372] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Indexed: 01/02/2023]
Abstract
The development of a predictive model towards site-selective deprotometalation reactions using TMPZnCl⋅LiCl is reported (TMP=2,2,6,6-tetramethylpiperidinyl). The pKa values of functionalized N-, S-, and O-heterocycles, arenes, alkenes, or alkanes were calculated and compared to the experimental deprotonation sites. Large overlap (>80 %) between the calculated and empirical deprotonation sites was observed, showing that thermodynamic factors strongly govern the metalation regioselectivity. In the case of olefins, calculated frozen state energies of the deprotonated substrates allowed a more accurate prediction. Additionally, various new N-heterocycles were analyzed and the metalation regioselectivities rationalized using the predictive model.
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Affiliation(s)
- Moritz Balkenhohl
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Harish Jangra
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Ilya S. Makarov
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Shu‐Mei Yang
- Department of ChemistryNational (Taiwan) Normal University88, Sec. 4, Tingchow RoadTaipei11677Taiwan, Republic of China
| | - Hendrik Zipse
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Paul Knochel
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
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4
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Balkenhohl M, Jangra H, Makarov IS, Yang S, Zipse H, Knochel P. A Predictive Model Towards Site‐Selective Metalations of Functionalized Heterocycles, Arenes, Olefins, and Alkanes using TMPZnCl⋅LiCl. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005372] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Moritz Balkenhohl
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 Munich Germany
| | - Harish Jangra
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 Munich Germany
| | - Ilya S. Makarov
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 Munich Germany
| | - Shu‐Mei Yang
- Department of Chemistry National (Taiwan) Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, Republic of China
| | - Hendrik Zipse
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 Munich Germany
| | - Paul Knochel
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 Munich Germany
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5
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Balkenhohl M, Ziegler DS, Desaintjean A, Bole LJ, Kennedy AR, Hevia E, Knochel P. Preparation of Polyfunctional Arylzinc Organometallics in Toluene by Halogen/Zinc Exchange Reactions. Angew Chem Int Ed Engl 2019; 58:12898-12902. [PMID: 31243862 DOI: 10.1002/anie.201906898] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Indexed: 11/09/2022]
Abstract
A wide range of polyfunctional diaryl- and diheteroarylzinc species were prepared in toluene within 10 min to 5 h through an I/Zn or Br/Zn exchange reaction using bimetallic reagents of the general formula R'2 Zn⋅2 LiOR (R'=sBu, tBu, pTol). Highly sensitive functional groups, such as a triazine, a ketone, an aldehyde, or a nitro group, were tolerated in these exchange reactions, enabling the synthesis of a plethora of functionalized (hetero)arenes after quenching with various electrophiles. Insight into the constitution and reactivity of these bimetallic mixtures revealed the formation of highly active lithium diorganodialkoxyzincates of type [R'2 Zn(OR)2 Li2 ].
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Affiliation(s)
- Moritz Balkenhohl
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Dorothée S Ziegler
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Alexandre Desaintjean
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Leonie J Bole
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Alan R Kennedy
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Eva Hevia
- Department für Chemie und Biochemie, Universität Bern, 3012, Bern, Switzerland
| | - Paul Knochel
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
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6
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Balkenhohl M, Ziegler DS, Desaintjean A, Bole LJ, Kennedy AR, Hevia E, Knochel P. Herstellung von polyfunktionellen Arylzinkreagenzien in Toluol mittels Halogen/Zink‐Austauschreaktionen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906898] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Moritz Balkenhohl
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Dorothée S. Ziegler
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Alexandre Desaintjean
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Leonie J. Bole
- Department of Pure and Applied Chemistry University of Strathclyde Glasgow G1 1XL Großbritannien
| | - Alan R. Kennedy
- Department of Pure and Applied Chemistry University of Strathclyde Glasgow G1 1XL Großbritannien
| | - Eva Hevia
- Department für Chemie und Biochemie Universität Bern 3012 Bern Schweiz
| | - Paul Knochel
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
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7
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Sempere Y, Alfke JL, Rössler SL, Carreira EM. Morpholine Ketene Aminal as Amide Enolate Surrogate in Iridium‐Catalyzed Asymmetric Allylic Alkylation. Angew Chem Int Ed Engl 2019; 58:9537-9541. [DOI: 10.1002/anie.201903090] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Indexed: 01/24/2023]
Affiliation(s)
- Yeshua Sempere
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jan L. Alfke
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Simon L. Rössler
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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8
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Cao Q, Stark RT, Fallis IA, Browne DL. A Ball-Milling-Enabled Reformatsky Reaction. CHEMSUSCHEM 2019; 12:2554-2557. [PMID: 31033237 PMCID: PMC6619031 DOI: 10.1002/cssc.201900886] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/24/2019] [Indexed: 05/14/2023]
Abstract
An operationally simple one-jar one-step mechanochemical Reformatsky reaction using in situ generated organozinc intermediates under neat grinding conditions has been developed. Notable features of this reaction protocol are that it requires no solvent, no inert gases, and no pre-activation of the bulk zinc source. The developed process is demonstrated to have good substrate scope (39-82 % yield) and is effective irrespective of the initial morphology of the zinc source.
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Affiliation(s)
- Qun Cao
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATUK
| | - Roderick T. Stark
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATUK
| | - Ian A. Fallis
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATUK
| | - Duncan L. Browne
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATUK
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9
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Sempere Y, Alfke JL, Rössler SL, Carreira EM. Morpholine Ketene Aminal as Amide Enolate Surrogate in Iridium‐Catalyzed Asymmetric Allylic Alkylation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yeshua Sempere
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jan L. Alfke
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Simon L. Rössler
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische Chemie, HCI H335Eidgenössische Technische Hochschule Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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10
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Balkenhohl M, Jangra H, Lenz T, Ebeling M, Zipse H, Karaghiosoff K, Knochel P. Lewis‐Säure‐dirigierte regioselektive Metallierungen an Pyridazin. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903839] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Moritz Balkenhohl
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Harish Jangra
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Tobias Lenz
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Marian Ebeling
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Hendrik Zipse
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Konstantin Karaghiosoff
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Deutschland
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11
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Balkenhohl M, Jangra H, Lenz T, Ebeling M, Zipse H, Karaghiosoff K, Knochel P. Lewis Acid Directed Regioselective Metalations of Pyridazine. Angew Chem Int Ed Engl 2019; 58:9244-9247. [DOI: 10.1002/anie.201903839] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Moritz Balkenhohl
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
| | - Harish Jangra
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
| | - Tobias Lenz
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
| | - Marian Ebeling
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
| | - Hendrik Zipse
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
| | - Konstantin Karaghiosoff
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
| | - Paul Knochel
- Ludwig-Maximilians-Universität MünchenDepartment Chemie Butenandtstrasse 5–13, Haus F 81377 München Germany
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12
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Lutter FH, Graßl S, Grokenberger L, Hofmayer MS, Chen Y, Knochel P. Cobalt‐Catalyzed Cross‐Couplings and Electrophilic Aminations using Organozinc Pivalates. ChemCatChem 2019. [DOI: 10.1002/cctc.201900070] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ferdinand H. Lutter
- Ludwig-Maximilians-UniversitätDepartment Chemie und Biochemie Butenandtstr. 5–13 81377 München
| | - Simon Graßl
- Ludwig-Maximilians-UniversitätDepartment Chemie und Biochemie Butenandtstr. 5–13 81377 München
| | - Lucie Grokenberger
- Ludwig-Maximilians-UniversitätDepartment Chemie und Biochemie Butenandtstr. 5–13 81377 München
| | - Maximilian S. Hofmayer
- Ludwig-Maximilians-UniversitätDepartment Chemie und Biochemie Butenandtstr. 5–13 81377 München
| | - Yi‐Hung Chen
- The Institute for Advanced StudiesWuhan University Wuhan 430072 P. R. of China
| | - Paul Knochel
- Ludwig-Maximilians-UniversitätDepartment Chemie und Biochemie Butenandtstr. 5–13 81377 München
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13
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Cao Q, Howard JL, Wheatley E, Browne DL. Mechanochemical Activation of Zinc and Application to Negishi Cross-Coupling. Angew Chem Int Ed Engl 2018; 57:11339-11343. [PMID: 30015403 PMCID: PMC6220771 DOI: 10.1002/anie.201806480] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Indexed: 11/26/2022]
Abstract
A form independent activation of zinc, concomitant generation of organozinc species and engagement in a Negishi cross-coupling reaction via mechanochemical methods is reported. The reported method exhibits a broad substrate scope for both C(sp3 )-C(sp2 ) and C(sp2 )-C(sp2 ) couplings and is tolerant to many important functional groups. The method may offer broad reaching opportunities for the in situ generation organometallic compounds from base metals and their concomitant engagement in synthetic reactions via mechanochemical methods.
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Affiliation(s)
- Qun Cao
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3EQUK
| | - Joseph L. Howard
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3EQUK
| | - Emilie Wheatley
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3EQUK
| | - Duncan L. Browne
- School of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3EQUK
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14
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Fu Y, Gou B, Shi C, Du Z, Shen T. Copper‐Catalyzed Monoorganylation of Trialkyl Borates with Functionalized Organozinc Pivalates. ChemCatChem 2018. [DOI: 10.1002/cctc.201800939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ying Fu
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R. China
| | - Bei‐Lei Gou
- College of Chemistry and BioengineeringLanzhou Jiaotong University Lanzhou 730070 P.R. China
| | - Chun‐Zhao Shi
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R. China
| | - Zhengyin Du
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R. China
| | - Tong Shen
- College of Chemistry and BioengineeringLanzhou Jiaotong University Lanzhou 730070 P.R. China
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15
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Cao Q, Howard JL, Wheatley E, Browne DL. Mechanochemical Activation of Zinc and Application to Negishi Cross-Coupling. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806480] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qun Cao
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff CF10 3EQ UK
| | - Joseph L. Howard
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff CF10 3EQ UK
| | - Emilie Wheatley
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff CF10 3EQ UK
| | - Duncan L. Browne
- School of Chemistry; Cardiff University; Main Building, Park Place Cardiff CF10 3EQ UK
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16
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Ziegler DS, Karaghiosoff K, Knochel P. Generation of Aryl and Heteroaryl Magnesium Reagents in Toluene by Br/Mg or Cl/Mg Exchange. Angew Chem Int Ed Engl 2018; 57:6701-6704. [PMID: 29656503 DOI: 10.1002/anie.201802123] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Indexed: 11/10/2022]
Abstract
The alkylmagnesium alkoxide sBuMgOR⋅LiOR (R=2-ethylhexyl), which was prepared as a 1.5 m solution in toluene, undergoes very fast Br/Mg exchange with aryl and heteroaryl bromides, producing aryl and heteroaryl magnesium alkoxides (ArMgOR⋅LiOR) in toluene. These Grignard reagents react with a broad range of electrophiles, including aldehydes, ketones, allyl bromides, acyl chlorides, epoxides, and aziridines, in good yields. Remarkably, the related reagent sBu2 Mg⋅2 LiOR (R=2-ethylhexyl) undergoes Cl/Mg exchange with various electron-rich aryl chlorides in toluene, producing diorganomagnesium species of type Ar2 Mg⋅2 LiOR, which react well with aldehydes and allyl bromides.
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Affiliation(s)
- Dorothée S Ziegler
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, Haus F, 81377, München, Germany
| | - Konstantin Karaghiosoff
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, Haus F, 81377, München, Germany
| | - Paul Knochel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, Haus F, 81377, München, Germany
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17
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Ziegler DS, Karaghiosoff K, Knochel P. Generierung von Aryl‐ und Heteroarylmagnesium‐Reagenzien in Toluol mittels Br/Mg‐ oder Cl/Mg‐Austausch. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802123] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dorothée S. Ziegler
- Department ChemieLudwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Konstantin Karaghiosoff
- Department ChemieLudwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department ChemieLudwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
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18
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Cobalt-Catalyzed Electrophilic Amination of Aryl- and Heteroarylzinc Pivalates with N
-Hydroxylamine Benzoates. Angew Chem Int Ed Engl 2017; 57:1108-1111. [DOI: 10.1002/anie.201710931] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 11/21/2017] [Indexed: 01/03/2023]
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19
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Chen YH, Graßl S, Knochel P. Cobalt-katalysierte elektrophile Aminierung von Aryl- und Heteroarylzinkpivalaten mit N
-Hydroxylaminbenzoaten. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710931] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yi-Hung Chen
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Simon Graßl
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
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20
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Zhao Y, Chen Y, Newhouse TR. Allyl-Palladium-Catalyzed α,β-Dehydrogenation of Carboxylic Acids via Enediolates. Angew Chem Int Ed Engl 2017; 56:13122-13125. [PMID: 28796936 DOI: 10.1002/anie.201706893] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Indexed: 12/30/2022]
Abstract
A highly practical and step-economic α,β-dehydrogenation of carboxylic acids via enediolates is reported through the use of allyl-palladium catalysis. Dianions underwent smooth dehydrogenation when generated using Zn(TMP)2 ⋅2 LiCl as a base in the presence of excess ZnCl2 , thus avoiding the typical decarboxylation pathway of these substrates. Direct access to 2-enoic acids allows derivatization by numerous approaches.
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Affiliation(s)
- Yizhou Zhao
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 208107, New Haven, CT, 06511, USA
| | - Yifeng Chen
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 208107, New Haven, CT, 06511, USA.,Current address: School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Mei-Long Road, Shanghai, 200237, China
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, PO Box 208107, New Haven, CT, 06511, USA
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21
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Zhao Y, Chen Y, Newhouse TR. Allyl‐Palladium‐Catalyzed α,β‐Dehydrogenation of Carboxylic Acids via Enediolates. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706893] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yizhou Zhao
- Department of Chemistry Yale University 225 Prospect Street, PO Box 208107 New Haven CT 06511 USA
| | - Yifeng Chen
- Department of Chemistry Yale University 225 Prospect Street, PO Box 208107 New Haven CT 06511 USA
- Current address: School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Mei-Long Road Shanghai 200237 China
| | - Timothy R. Newhouse
- Department of Chemistry Yale University 225 Prospect Street, PO Box 208107 New Haven CT 06511 USA
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22
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Ganiek MA, Becker MR, Berionni G, Zipse H, Knochel P. Barbier Continuous Flow Preparation and Reactions of Carbamoyllithiums for Nucleophilic Amidation. Chemistry 2017; 23:10280-10284. [PMID: 28590518 DOI: 10.1002/chem.201702593] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Indexed: 11/05/2022]
Abstract
An ambient temperature continuous flow method for nucleophilic amidation and thioamidation is described. Deprotonation of formamides by lithium diisopropylamine (LDA) affords carbamoyllithium intermediates that are quenched in situ with various electrophiles such as ketones, allyl bromides, Weinreb and morpholino amides. The nature of the reactive lithium intermediates and the thermodynamics of the metalation were further investigated by ab initio calculations and kinetic experiments.
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Affiliation(s)
- Maximilian A Ganiek
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Matthias R Becker
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Guillaume Berionni
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Hendrik Zipse
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Paul Knochel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
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23
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Chen YH, Tüllmann CP, Ellwart M, Knochel P. Preparation of Solid Polyfunctional Alkynylzinc Pivalates with Enhanced Air and Moisture Stability for Organic Synthesis. Angew Chem Int Ed Engl 2017; 56:9236-9239. [DOI: 10.1002/anie.201704400] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Yi-Hung Chen
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Carl Phillip Tüllmann
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Mario Ellwart
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Paul Knochel
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstrasse 5-13, Haus F 81377 München Germany
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24
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Chen YH, Tüllmann CP, Ellwart M, Knochel P. Herstellung fester polyfunktioneller Alkinylzinkpivalate mit verbesserter Luft- und Feuchtigkeitsstabilität. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704400] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yi-Hung Chen
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Carl Phillip Tüllmann
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Mario Ellwart
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13, Haus F 81377 München Deutschland
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