|
1
|
Liu S, Qian H, Zhang T, Xie H, Han Z, Guo W, Huang H, Sun J. Mild Intermolecular Synthesis of a Cyclopropane‐Containing Tricyclic Skeleton: Unusual Reactivity of Isobenzopyryliums. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuxuan Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Hui Qian
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
| | - Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Hongling Xie
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Wengang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
| |
Collapse
|
|
2
|
Liu S, Qian H, Zhang T, Xie H, Han Z, Guo W, Huang H, Sun J. Mild Intermolecular Synthesis of a Cyclopropane-Containing Tricyclic Skeleton: Unusual Reactivity of Isobenzopyryliums. Angew Chem Int Ed Engl 2021; 60:21272-21276. [PMID: 34342934 DOI: 10.1002/anie.202108258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/02/2021] [Indexed: 11/05/2022]
Abstract
Cyclopropanes embedded in a polycyclic bridged architecture are a versatile structural motif, but such complex frameworks often impose substantial synthetic challenges. Herein we introduce a new approach for the expedient access to such spring-loaded strained systems via an exceptionally mild intermolecular convergent process between the readily available isobenzopyryliums and vinyl boronic acids. Different from the typical conventional approaches, our protocol does not involve the highly active carbenoid intermediates or strong conditions in order to overcome the disfavored kinetic and thermodynamic problems. Instead, the key cyclopropane ring was formed between the well-positioned nucleophile and electrophile in the adduct from the regioselective [4+2] cycloaddition. Thus, this unusual process also represents a new reactivity of the versatile isobenzopyryliums. The choice of a Brønsted acid catalyst with proper acidity is crucial to the high efficiency and selectivity for this multiple bond-forming process. The strained products are precursors to other useful synthetic building blocks.
Collapse
Affiliation(s)
- Shuxuan Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Hui Qian
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Hongling Xie
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Wengang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| |
Collapse
|
|
3
|
Lokshin V, Clavier H, Khodorkovsky V. Spiro 1,3-indandiones: intramolecular photochemical reactions of carbonyl groups with carbon–carbon double bonds. NEW J CHEM 2020. [DOI: 10.1039/d0nj02923h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Spiro-1,3-indandiones involving a double CC bond undergo photochemical intramolecular reactions affording a variety of polycyclic products.
Collapse
Affiliation(s)
- Vladimir Lokshin
- Aix Marseille Univ, CNRS, CINaM UMR 7325
- Campus de Luminy – Case 913
- Marseille
- France
| | - Hervé Clavier
- Aix Marseille Univ, CNRS, Centrale Marseille
- iSm2
- 13397 Marseille
- France
| | | |
Collapse
|
|
4
|
Tuten BT, Wiedbrauk S, Barner-Kowollik C. Contemporary catalyst-free photochemistry in synthetic macromolecular science. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2019.101183] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
|
5
|
Tanaka K, Omata D, Asada Y, Hoshino Y, Honda K. Organophotoredox-Catalyzed Intermolecular Oxa-[4+2] Cycloaddition Reactions. J Org Chem 2019; 84:10669-10678. [PMID: 31322873 DOI: 10.1021/acs.joc.9b01156] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An intermolecular oxa-[4+2] cycloaddition reaction promoted by a thioxanthylium photoredox catalyst under irradiation with green light has been developed. The reaction of ortho-quinone methides with styrenes smoothly affords the desired cycloadducts. Especially styrenes bearing electron-donating groups are efficiently transformed in this reaction. This method represents a sustainable way to carry out oxa-[4+2] cycloaddition reactions using only a catalytic amount of a photocatalyst and visible light.
Collapse
Affiliation(s)
- Kenta Tanaka
- Graduate School of Environment and Information Sciences , Yokohama National University , Tokiwadai , Hodogaya-ku, Yokohama 240-8501 , Japan
| | - Daichi Omata
- Graduate School of Environment and Information Sciences , Yokohama National University , Tokiwadai , Hodogaya-ku, Yokohama 240-8501 , Japan
| | - Yosuke Asada
- Graduate School of Environment and Information Sciences , Yokohama National University , Tokiwadai , Hodogaya-ku, Yokohama 240-8501 , Japan
| | - Yujiro Hoshino
- Graduate School of Environment and Information Sciences , Yokohama National University , Tokiwadai , Hodogaya-ku, Yokohama 240-8501 , Japan
| | - Kiyoshi Honda
- Graduate School of Environment and Information Sciences , Yokohama National University , Tokiwadai , Hodogaya-ku, Yokohama 240-8501 , Japan
| |
Collapse
|
|
6
|
Zhang X. Mechanistic study on the intramolecular oxa-[4 + 2] cycloaddition of substituted o-divinylbenzenes. J Mol Model 2019; 25:14. [PMID: 30607638 DOI: 10.1007/s00894-018-3883-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 11/28/2018] [Indexed: 12/13/2022]
|