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Lapoot L, Wang C, Matikonda SS, Schnermann MJ, Greer A. Bluer Phototruncation: Retro-Diels-Alder of Heptamethine Cyanine to Trimethine Cyanine through an Allene Hydroperoxide Intermediate. J Org Chem 2023. [PMID: 38051763 DOI: 10.1021/acs.joc.3c02245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
The photoconversion of heptamethine to pentamethine cyanines and of pentamethine to trimethine cyanines was recently reported. Here, we report mechanistic studies and initial experimental evidence for a previously unexplored 4-carbon truncation reaction that converts the simplest heptamethine cyanine to the corresponding trimethine cyanine. We propose a DFT-supported model describing a singlet oxygen (1O2)-mediated formation of an allene hydroperoxide intermediate and subsequent 4-carbon loss through a retro-Diels-Alder process. Fluorescence and mass spectrometry measurements provide evidence of this direct conversion process. This 4-carbon truncation reaction adds to a growing body of cyanine reactivity and may provide an optical tool leading to a substantial blue-shift (Δλem) of ∼200 nm.
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Affiliation(s)
- Lloyd Lapoot
- Department of Chemistry, Brooklyn College, Brooklyn, New York 11210, United States
- Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
| | - Connor Wang
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Siddharth S Matikonda
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Martin J Schnermann
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, Brooklyn, New York 11210, United States
- Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
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Ahraminejad M, Ghiasi R, Mohtat B, Ahmadi R. SUBSTITUENT EFFECT IN [2+4] DIELS–ALDER CYCLOADDITION REACTIONS OF ANTHRACENE WITH C2X2 (X = H, F, Cl, Me): A COMPUTATIONAL INVESTIGATION. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621100097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Nokhbeh SR, Gholizadeh M, Salimi A, Delaram B, Makari F. Synthesis, crystal and structural characterization, Hirshfeld surface analysis and DFT calculations of three symmetrical and asymmetrical phosphonium salts. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ahraminejad M, Ghiasi R, Mohtat B, Ahmadi R. Computational investigation of the substituent effect in the [2 + 4] Diels–Alder cycloaddition reactions of
HSi
≡Si(
para
‐C
6
H
4
X
) with benzene. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000428] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mina Ahraminejad
- Department of Chemistry, Karaj Branch Islamic Azad University Karaj Iran
| | - Reza Ghiasi
- Department of Chemistry, East Tehran Branch Islamic Azad University Tehran Iran
| | - Bita Mohtat
- Department of Chemistry, Karaj Branch Islamic Azad University Karaj Iran
| | - Roya Ahmadi
- Department of Chemistry, Faculty of Basic science, Yadegar‐Emam Branch Islamic Azad University Tehran Iran
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Patel TR, Ganguly B. Revealing the Origin of Π‐facial and Regioselectivity in the Diels‐Alder Reaction of Unsymmetrical, Cage‐annulated 1,3‐Cyclohexadiene with Ethyl Propiolate Dienophile: a DFT Study. ChemistrySelect 2020. [DOI: 10.1002/slct.202003443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tulsi R. Patel
- Computation and Simulation Unit (Analytical & Environmental Science Division and Centralized Instrument Facility) CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, India- 364 002 Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Computation and Simulation Unit (Analytical & Environmental Science Division and Centralized Instrument Facility) CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, India- 364 002 Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Bishwajit Ganguly
- Computation and Simulation Unit (Analytical & Environmental Science Division and Centralized Instrument Facility) CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, India- 364 002 Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Computation and Simulation Unit (Analytical & Environmental Science Division and Centralized Instrument Facility) CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, India- 364 002 Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
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