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Zhang ZJ, Hsu YF, Kao CC, Yang JS. One-Pot Synthesis of Bis(arylamino)pentiptycenes by TiCl 4-DABCO Assisted Reductive Amination of Pentiptycene Quinone. Org Lett 2024; 26:3547-3551. [PMID: 38656102 PMCID: PMC11077485 DOI: 10.1021/acs.orglett.4c00939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/16/2024] [Accepted: 04/23/2024] [Indexed: 04/26/2024]
Abstract
The previously eight-step synthesis of bis(arylamino)pentiptycenes (2) from pentiptycene quinone (1) can now be achieved in a single step with 18-90% yields through TiCl4-DABCO assisted reductive amination with anilines. Both the dual amination of 1 and the in situ reduction of quinone diimines are unprecedented. The π system of 2 can be further expanded, including the formation of bis(diarylamino)pentiptycenes. This work also provides mechanistic insights into the challenges encountered in the dual reductive amination of 1 with other amines.
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Affiliation(s)
- Zhe-Jie Zhang
- Department of Chemistry, National
Taiwan University, Taipei, 10617, Taiwan
| | - Ying-Feng Hsu
- Department of Chemistry, National
Taiwan University, Taipei, 10617, Taiwan
| | - Chia-Chien Kao
- Department of Chemistry, National
Taiwan University, Taipei, 10617, Taiwan
| | - Jye-Shane Yang
- Department of Chemistry, National
Taiwan University, Taipei, 10617, Taiwan
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2
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Singhania A, Chatterjee S, Kalita S, Saha S, Chettri P, Gayen FR, Saha B, Sahoo P, Bandyopadhyay A, Ghosh S. An Inbuilt Electronic Pawl Gates Orbital Information Processing and Controls the Rotation of a Double Ratchet Rotary Motor. ACS APPLIED MATERIALS & INTERFACES 2023; 15:15595-15604. [PMID: 36926805 DOI: 10.1021/acsami.3c01103] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A direct external input energy source (e.g., light, chemical reaction, redox potential, etc.) is compulsory to supply energy to rotary motors for accomplishing rotation around the axis. The stator leads the direction of rotation, and a sustainable rotation requires two mutual input energy supplies (e.g., light and heat, light and pH or metal ion, etc.); however, there are some exceptions (e.g., covalent single bond rotors and/or motors). On the contrary, our experiment suggested that double ratchet rotary motors (DRMs) can harvest power from available thermal noise, kT, for sustainable rotation around the axis. Under a scanning tunneling microscope, we have imaged live thermal noise movement as a dynamic orbital density and resolved the density diagram up to the second derivative. A second input energy can synchronize multiple rotors to afford a measurable output. Therefore, we hypothesized that rotation control in a DRM must be evolved from an orbital-level information transport channel between the two coupled rotors but was not limited to the second input energy. A DRM comprises a Brownian rotor and a power stroke rotor coupled to a -C≡C- stator, where the transport of information through coupled orbitals between the two rotors is termed the vibrational information flow chain (VIFC). We test this hypothesis by studying the DRM's density functional theory calculation and variable-temperature 1H nuclear magnetic resonance. Additionally, we introduced inbuilt pawl-like functional moieties into a DRM to create different electronic environments by changing proton intercalation interactions, which gated information processing through the VIFC. The results show the VIFC can critically impact the motor's noise harvesting, resulting in variable rotational motions in DRMs.
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Affiliation(s)
- Anup Singhania
- Natural Product Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Satadru Chatterjee
- Natural Product Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
| | - Sudeshna Kalita
- Natural Product Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Supriya Saha
- Advanced Computation & Data Sciences Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- Green Engineered Materials and Additive Manufacturing Division, CSIR-AMPRI, 462026 Bhopal, Madhya Pradesh, India
| | - Prerna Chettri
- Natural Product Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Firdaus Rahaman Gayen
- Advanced Materials Group, Material Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Biswajit Saha
- Advanced Materials Group, Material Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pathik Sahoo
- International Center for Materials and Nanoarchitectronics (MANA) and Research Center for Advanced Measurement and Characterization (RCAMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
| | - Anirban Bandyopadhyay
- International Center for Materials and Nanoarchitectronics (MANA) and Research Center for Advanced Measurement and Characterization (RCAMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
| | - Subrata Ghosh
- Natural Product Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Chen Z, Lu H, Chao I, Yang J. On–off switching of the correlated motion in a rotation‐inversion dual‐mode molecular system. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200190] [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)
- Zi‐Jian Chen
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Hsiu‐Feng Lu
- Institute of Chemistry Academia Sinica Taipei Taiwan
| | - Ito Chao
- Institute of Chemistry Academia Sinica Taipei Taiwan
| | - Jye‐Shane Yang
- Department of Chemistry National Taiwan University Taipei Taiwan
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Chen ZJ, Lu HF, Chao I, Yang JS. A Rotation-Inversion Dual-Motion Molecular Switch: Race for NMR Signaling. J Org Chem 2022; 87:5029-5034. [PMID: 35321542 DOI: 10.1021/acs.joc.2c00140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The interplay between the thermal helical inversion (THI) of the stiff-stilbene moiety and the rotation of the dimethylamino (DMA) group in 1 results in a dependence of the DMA NMR signals on the THI kinetics in (E)-1 but the rotation kinetics in (Z)-1, because the faster motion mode is responsible. Consequently, the photochemical switching from (E)-1 to (Z)-1 illustrates the phenomenon of "switchable motion detection" by the same set of NMR signals in a dual-motion molecular system.
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Affiliation(s)
- Zi-Jian Chen
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 10617
| | - Hsiu-Feng Lu
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan 11529
| | - Ito Chao
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan 11529
| | - Jye-Shane Yang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 10617
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Villarón D, Duindam N, Wezenberg SJ. Push-Pull Stiff-Stilbene: Proton-Gated Visible-Light Photoswitching and Acid-Catalyzed Isomerization. Chemistry 2021; 27:17346-17350. [PMID: 34605565 PMCID: PMC9298359 DOI: 10.1002/chem.202103052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Indexed: 01/03/2023]
Abstract
Donor‐acceptor substituted stiff‐stilbene is shown to undergo isomerization induced by visible light avoiding the need for harmful UV light. This visible‐light photoswitching is inhibited by protonation of the dimethylamino‐donor unit, disrupting the push‐pull character and thus, gating of the photochromic properties is allowed by acid/base addition. Remarkably, the addition of a mild acid also triggers fast thermal back‐isomerization, which is unprecedented for stiff‐stilbene photoswitches usually having a very high energy barrier for this process. These combined features offer unique orthogonal control over switching behavior by light and protonation, which is investigated in detail by 1H NMR and UV/Vis spectroscopy. In addition, TD‐DFT calculations are used to gain further insight into the absorption properties. Our results will help elevating the level of control over dynamic behavior in stiff‐stilbene applications.
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Affiliation(s)
- David Villarón
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Nol Duindam
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Sander J Wezenberg
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
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