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Yamada M. Perspectives on push-pull chromophores derived from click-type [2 + 2] cycloaddition-retroelectrocyclization reactions of electron-rich alkynes and electron-deficient alkenes. Beilstein J Org Chem 2024; 20:125-154. [PMID: 38292046 PMCID: PMC10825803 DOI: 10.3762/bjoc.20.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 01/04/2024] [Indexed: 02/01/2024] Open
Abstract
Various push-pull chromophores can be synthesized in a single and atom-economical step through [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) reactions involving diverse electron-rich alkynes and electron-deficient alkenes. In this review, a comprehensive investigation of the recent and noteworthy advancements in the research on push-pull chromophores prepared via the [2 + 2] CA-RE reaction is conducted. In particular, an overview of the physicochemical properties of the family of these compounds that have been investigated is provided to clarify their potential for future applications.
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Affiliation(s)
- Michio Yamada
- Department of Chemistry, Tokyo Gakugei University, Nukuikitamachi 4-1-1, Koganei, Tokyo 184-8501, Japan
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Neethu KM, Nag K, Dar AH, Bajaj A, Gopal SA, Gowri V, Nagpure M, Sartaliya S, Sharma R, Solanki AK, Ehesan Ali M, Muthukrishnan A, Jayamurugan G. A study of [2 + 2] cycloaddition-retroelectrocyclization in water: observation of substrate-driven transient-nanoreactor-induced new reactivity. Org Biomol Chem 2023; 21:2922-2929. [PMID: 36943100 DOI: 10.1039/d3ob00053b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Organic solvents limit [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) in biological fields. We examined the formation of 1,1,4,4-tetracyanobuta-1,3-dienes (TCBDs) through CA-RE reactions and their unusual reactivity to produce N-heterocyclic compounds when the nature of the surfactant and the concentrations were varied in the aqueous phase. An environment in which transient self-assemblies (vesicles) were induced by the substrate and surfactant molecules initiated new reactivity through H2O addition on the TCBD, generating the enol form of the intermediate, which results in the formation of the 6,6-dicyano-heteropentafulvene (amidofulvene) compound, while lamellar sheets at higher concentrations favored TCBD generation. Interestingly, the amidofulvene underwent a clean transformation to 6-membered heterocycles that resemble cardiotonic drugs (milrinone, amrinone) via keto-enol tautomerism mediated by a polar aprotic solvent, opening up a new avenue for drug discovery. Unlike organic-solvent-mediated CA-RE reactions, the present nanoreactor-mediated approach enabled the selective production of TCBDs as well as new heterocycles using H2O as a green solvent. In addition to the widely explored organic electronics/materials, we believe that this study will help to overcome the long-standing limitation of CA-RE reaction applicability in biological fields.
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Affiliation(s)
- K M Neethu
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Kritika Nag
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Arif Hassan Dar
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Ashima Bajaj
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - S Arya Gopal
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, Kerala, India
| | - Vijayendran Gowri
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Mithilesh Nagpure
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Shaifali Sartaliya
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Raina Sharma
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Arun Kumar Solanki
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Md Ehesan Ali
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
| | - Azhagumuthu Muthukrishnan
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, Kerala, India
| | - Govindasamy Jayamurugan
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Manauli PO, Mohali, Punjab 140306, India.
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Sowden MJ, Ward JS, Sherburn MS. Synthesis and Properties of 2,3-Diethynyl-1,3-Butadienes. Angew Chem Int Ed Engl 2020; 59:4145-4153. [PMID: 31872518 DOI: 10.1002/anie.201914807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Indexed: 11/08/2022]
Abstract
The first general preparative access to compounds of the 2,3-diethynyl-1,3-butadiene (DEBD) class is reported. The synthesis involves a one-pot, twofold Sonogashira-type, Pd0 -catalyzed coupling of two terminal alkynes and a carbonate derivative of a 2-butyne-1,4-diol. The synthesis is broad in scope and members of this structural family are kinetically stable enough to be handled using standard laboratory techniques at ambient temperature. They decompose primarily through heat-promoted cyclodimerizations, which are impeded by alkyl substitution and accelerated by aryl or alkenyl substitution. An iterative sequence of these unprecedented Sonogashira-type couplings generates a new type of expanded dendralene. A suitably substituted DEBD carrying two terminal alkyne groups undergoes Glaser-Eglinton cyclo-oligomerization to produce a new class of expanded radialenes, which are chiral due to restricted rotation about their 1,3-butadiene units. The structural features giving rise to atropisomerism in these compounds are distinct from those reported previously.
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Affiliation(s)
- Madison J Sowden
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Jas S Ward
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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