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Davies AM, Greene KH, Allen AR, Farris BM, Szymczak NK, Stephenson CRJ. Catalytic Olefin Transpositions Facilitated by Ruthenium N,N,N-Pincer Complexes. J Org Chem 2024; 89:9647-9653. [PMID: 38901003 DOI: 10.1021/acs.joc.4c00304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
In this report, we demonstrate olefin transposition/isomerization reactions catalyzed by a series of N,N,N-pincer (1,3-bis(2-pyridylimino)isoindoline) Ru-hydride complexes. The protocol proceeds at room temperature for most substrates, achieving excellent yields, regioselectivity, and diastereoselectivity in short reaction times. The air-stable Ru-chloride derivatives of these complexes exhibit comparable reactivity enabling benchtop setup and synthetic versatility. Furthermore, we demonstrate the potential for one-pot cascade sequences of the products derived from the transposition reactions.
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Affiliation(s)
- Alex M Davies
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kara H Greene
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Anthony R Allen
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Benjamin M Farris
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Nathaniel K Szymczak
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Corey R J Stephenson
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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Imagawa T, Okazawa K, Yoshizawa K, Yoshida H, Shang R, Yamamoto Y, Nakamoto M. Complexation-Triggered Fluctuation of π-Conjugation on an Antiaromatic Dicyanoanthracene Dianion. Chemistry 2023:e202302550. [PMID: 37643995 DOI: 10.1002/chem.202302550] [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: 08/06/2023] [Revised: 08/29/2023] [Accepted: 08/29/2023] [Indexed: 08/31/2023]
Abstract
The formation of Lewis pairs is an important chemical concept. Recently, the complexation of Lewis acidic tris(pentafluorophenyl)borane with Lewis basic moieties and subsequent reduction has emerged as a fascinating strategy for designing novel reactions and structures. The impact of the complexation and subsequent reduction of antiaromatic systems bearing Lewis base moieties has been investigated. We found how Lewis adduct formation stabilizes an antiaromatic system consisting of 9,10-dicyanoanthracene and tris(pentafluorophenyl)borane by using synthesis, X-ray crystallography, spectroscopic analysis, and quantum chemical calculations.
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Affiliation(s)
- Taiki Imagawa
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Kazuki Okazawa
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hiroto Yoshida
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Rong Shang
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Yohsuke Yamamoto
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Masaaki Nakamoto
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
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Gao Y, Pink M, Carta V, Smith JM. Ene Reactivity of an Fe═NR Bond Enables the Catalytic α-Deuteration of Nitriles and Alkynes. J Am Chem Soc 2022; 144:17165-17172. [PMID: 36070477 DOI: 10.1021/jacs.2c07462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report the reactions of an Fe(II) imido complex [Ph2B(tBuIm)2Fe═NDipp]- (1) with internal alkynes and isobutyronitrile, affording the Fe amido allenyl complexes [Ph2B(tBuIm)2Fe(NHDipp)((R1)C═C═C(R2)(H))]- (R1 = Et or nPr; R2 = Me or Et, 2-5) and the Fe amido keteniminate complex [Ph2B(tBuIm)2Fe(NHDipp)(N═C═CMe2)K(THF)]n (8-K), respectively. These transformations represent the previously unknown ene-like reactivity of a metal-ligand multiple bond. Stoichiometric reactions of 2 and 8-K with DippNH2 lead to the regeneration of 3-hexyne and isobutyronitrile, respectively, with concomitant formation of the bis(anilido) complex [Ph2B(tBuIm)2Fe(NHDipp)2]- (9). These results provide the platform for 1 as an efficient catalyst for the selective α-deuteration of nitriles and alkynes by RND2. These results demonstrate a new reaction mode for metal imido complexes and suggest new avenues for using the imido ligand in catalysis.
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Affiliation(s)
- Yafei Gao
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Maren Pink
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Veronica Carta
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Jeremy M Smith
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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Kumar S, Chaudhri N, Osterloh WR, Kadish KM, Sankar M. Nickel(II) monobenzoporphyrins and chlorins: synthesis, electrochemistry and anion sensing properties. Dalton Trans 2021; 50:17086-17100. [PMID: 34779452 DOI: 10.1039/d1dt03122h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of nickel(II) monobenzochlorins (MBCs) and monobenzoporphyrins (MBPs) containing β-appended or meso,β-fused indanedione (IND) or malononitrile (MN) groups were synthesized and characterized for their physicochemical, electrochemical and anion sensing properties. Each investigated compound contained four meso-phenyl rings and a single β,β'-fused 4,5-di(methoxycarbonyl)benzene ring, with the chlorins represented as NiMBC(Y)2(R)4 and the porphyrins as NiMBP(YF)2, where Y is an indanedione (IND) or malononitrile (MN) group, R = H or Br and YF is a meso,β-fused IND or MN substituent. One of the investigated compounds, NiMBP(IND)2, was structurally characterized and shown to possess a ruffled macrocyclic conformation. The monobenzochlorins, NiMBC(IND)2, NiMBC(IND)2Br4 and NiMBC(MN)2, reversibly respond to basic anions such as CN-, F-, OAc- and H2PO4- through a visible color change assigned to the deprotonation of the vicinal proton on the appended IND or MN substituents. The malononitrile-fused NiII monobenzoporphyrin, NiMBP(MN)2, exhibited a selective but irreversible visual detection of cyanide ions (LOD = 2.23 ppm). This reaction afforded a tri-fused π-extended monobenzoporphyrin product represented as NiMBP(VCN)2 (where VCN = meso,β-fused vinyl cyanide) in non-aqueous media and proceeded via anion induced electron transfer (AIET). The in situ generated π-extended porphyrin was also isolated and characterized as to its physicochemical and electrochemical properties and found to possess a narrow electrochemical HOMO-LUMO gap of 1.46 V along with a near-IR (NIR) absorption band located at 861 nm.
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Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - Nivedita Chaudhri
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - W Ryan Osterloh
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA.
| | - Karl M Kadish
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA.
| | - Muniappan Sankar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
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Maeda K, Kurahashi T, Matsubara S. Synthesis, Characterization and Chemical Behavior of Disulfide-bearing Mononuclear Transition Metal Complexes with the Rigid Structure. CHEM LETT 2021. [DOI: 10.1246/cl.210458] [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)
- Kazuki Maeda
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Takuya Kurahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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Bihani M, Ansari TN, Finck L, Bora PP, Jasinski JB, Pavuluri B, Leahy DK, Handa S. Scalable α-Arylation of Nitriles in Aqueous Micelles using Ultrasmall Pd Nanoparticles: Surprising Formation of Carbanions in Water. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01196] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Manisha Bihani
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Tharique N. Ansari
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Lucie Finck
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Pranjal P. Bora
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Jacek B. Jasinski
- Materials Characterization, Conn Center for Renewable Energy Research, University of Louisville, Louisville, Kentucky 40292, United States
| | - Bhavana Pavuluri
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - David K. Leahy
- Process Chemistry Development, Takeda Pharmaceuticals International, Cambridge, Massachusetts 02139, United States
| | - Sachin Handa
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
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Catalytic Conversion of Nitriles by Metal Pincer Complexes. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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