1
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Sreedharan R, Gandhi T. Masters of Mediation: MN(SiMe 3) 2 in Functionalization of C(sp 3)-H Latent Nucleophiles. Chemistry 2024; 30:e202400435. [PMID: 38497321 DOI: 10.1002/chem.202400435] [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: 01/31/2024] [Revised: 03/16/2024] [Accepted: 03/18/2024] [Indexed: 03/19/2024]
Abstract
Organoalkali compounds have undergone a far-reaching transformation being a coupling partner to a mediator in unusual organic conversions which finds its spot in the field of sustainable synthesis. Transition-metal catalysis has always been the priority in C(sp3)-H bond functionalization, however alternatively, in recent times this has been seriously challenged by earth-abundant alkali metals and their complexes arriving at new sustainable organometallic reagents. In this line, the importance of MN(SiMe3)2 (M=Li, Na, K & Cs) reagent revived in C(sp3)-H bond functionalization over recent years in organic synthesis is showcased in this minireview. MN(SiMe3)2 reagent with higher reactivity, enhanced stability, and bespoke cation-π interaction have shown eye-opening mediated processes such as C(sp3)-C(sp3) cross-coupling, radical-radical cross-coupling, aminobenzylation, annulation, aroylation, and other transformations to utilize readily available petrochemical feedstocks. This article also emphasizes the unusual reactivity of MN(SiMe3)2 reagent in unreactive and robust C-X (X=O, N, F, C) bond cleavage reactions that occurred alongside the C(sp3)-H bond functionalization. Overall, this review encourages the community to exploit the untapped potential of MN(SiMe3)2 reagent and also inspires them to take up this subject to even greater heights.
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Affiliation(s)
- Ramdas Sreedharan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
| | - Thirumanavelan Gandhi
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
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2
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Yu L, Nagata Y, Nakamura H. Atroposelective Total Synthesis of Cihunamide B. J Am Chem Soc 2024; 146:2549-2555. [PMID: 38240691 DOI: 10.1021/jacs.3c11016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
A short, atroposelective synthesis of cihunamide B (1) is reported. The feature of this report is the decagram-scale SNAr reaction of l-tryptophan derivatives, followed by atroposelective Larock macrocyclization. This strategy allowed the construction of a Trp-Trp cross-linkage with unprecedented atropisomerism. The atroposelectivity of this Larock macrocyclization has been investigated through a combination of experimental and computational chemistry, yielding detailed insights into the synthesis of biaryl linkages. It also enabled the concise synthesis of cihunamide B (1), which is expected to be a potential antibacterial agent.
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Affiliation(s)
- Longhui Yu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China
| | - Yuuya Nagata
- WPI Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Hugh Nakamura
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China
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3
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Cai J, Zeng G, Jiang K, Luo H, Yin B. Intramolecular Cobalt/Visible Light Cocatalyzed Reductive Coupling of Unactivated Arenes with Unactivated Alkenes. Org Lett 2024; 26:327-331. [PMID: 38160449 DOI: 10.1021/acs.orglett.3c03978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
A protocol for the intramolecular reductive coupling of unactivated arenes with unactivated alkenes has been developed with the aid of a cooperative visible light/cobalt catalytic system. This coupling is achieved via radical cascade cyclization using amines as terminal reducing reagents and water as the main hydrogen source. In their form, readily available N-allyl benzamides are converted to the corresponding spiro cyclohexadiene-lactam or β-phenethylamine analogues in moderate to excellent yields.
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Affiliation(s)
- Jianpeng Cai
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Guohui Zeng
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Kai Jiang
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Hui Luo
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Biaolin Yin
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
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4
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Hu X, Qiao Z, Zhang L, Zhao J, Liu YZ, Zhang J, Ma X. One-pot cascade synthesis of dibenzothiophene-based heterobiaryls from dibenzothiophene-5-oxide. Org Biomol Chem 2023; 21:9123-9127. [PMID: 37947448 DOI: 10.1039/d3ob01468a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
A sulfoxide directed C-H metalation/boration/B2Pin2 mediated reduction/Suzuki coupling process to synthesize 4-substituted dibenzothiophene (DBT) in one-pot from dibenzothiophene-5-oxide (DBTO) was developed. A variety of DBT-based heterobiaryls were prepared in satisfactory to good yields. A mechanism was proposed. The application of this methodology was demonstrated by synthesizing a luminescent material.
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Affiliation(s)
- Xiaofang Hu
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China.
- College of Foundation, Shanxi Agricultural University, 030800 Taigu, Shanxi, People's Republic of China.
| | - Zeen Qiao
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China.
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Li Zhang
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China.
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jinzhong Zhao
- College of Foundation, Shanxi Agricultural University, 030800 Taigu, Shanxi, People's Republic of China.
| | - Ya-Zhou Liu
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China.
| | - Jiangang Zhang
- College of Foundation, Shanxi Agricultural University, 030800 Taigu, Shanxi, People's Republic of China.
| | - Xiaofeng Ma
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China.
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5
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Wang C, Yang N, Li C, He J, Li H. Tuning Benzylic C-H Functionalization of (Thio)xanthenes with Electrochemistry. Molecules 2023; 28:6139. [PMID: 37630392 PMCID: PMC10459638 DOI: 10.3390/molecules28166139] [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: 07/28/2023] [Revised: 08/13/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
Here, we report a tunable electrochemical benzylic C-H functionalization of (thio)xanthenes with terminal alkynes and nitriles in the absence of any catalyst or external chemical oxidant. The benzylic C-H functionalization can be well controlled by varying the electrochemical conditions, affording the specific coupling products via C-C and C-N bond formation.
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Affiliation(s)
- Changji Wang
- School of Chemical Engineering, Anhui University of Science and Technology, 168 Taifeng Road, Huainan 232001, China
| | - Na Yang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China; (N.Y.); (C.L.)
| | - Chao Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China; (N.Y.); (C.L.)
| | - Jian He
- Hefei New Online Technology Co., Ltd., Hefei 235000, China;
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China; (N.Y.); (C.L.)
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6
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Liu M, Zhu J, Jiang X, Yang X, Chen Q. Visible light irradiated photocatalytic C(sp 3)-H phosphorylation of xanthenes and 9,10-dihydroacridines with P(O)-H compounds. Org Biomol Chem 2023; 21:6488-6492. [PMID: 37526567 DOI: 10.1039/d3ob01053h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Photocatalytic C(sp3)-H phosphorylation of xanthenes and 9,10-dihydroacridines with P(O)-H compounds under the irradiation of 18 W blue LEDs at room temperature using fluorescein as the photocatalyst and molecular oxygen (O2) as the sole oxidant has been achieved. The newly developed reaction provides direct access to 9-phosphorylated xanthene derivatives with good functional group compatibility.
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Affiliation(s)
- Mingjun Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jiarui Zhu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Xuming Jiang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Xiangyun Yang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
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7
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Shigeno M, Kajima A, Toyama E, Korenaga T, Yamakoshi H, Nozawa-Kumada K, Kondo Y. LiHMDS-Mediated Deprotonative Coupling of Toluenes with Ketones. Chemistry 2023; 29:e202203549. [PMID: 36479733 DOI: 10.1002/chem.202203549] [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: 11/15/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022]
Abstract
We demonstrate that lithium hexamethyldisilazide (LiHMDS) acts as an effective base for deprotonative coupling reactions of toluenes with ketones to afford stilbenes. Various functionalities (halogen, OCF3 , amide, Me, aryl, alkenyl, alkynyl, SMe, and SPh) are allowed on the toluenes. Notably, this system proved successful with low-reactive toluenes bearing a large pKa value compared to that of the conjugate acid of LiHMDS (hexamethyldisilazane, 25.8, THF), as demonstrated by 4-phenyltoluene (38.57, THF) and toluene itself (∼43, DMSO).
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Affiliation(s)
- Masanori Shigeno
- Department of Biophysical Chemistry Graduate School of Pharmaceutical Science, Tohoku University, 6-3 Aoba, Sendai, 980-8578, Japan.,JST, PRESTO, Kawaguchi, Saitama, 332-0012, Japan
| | - Akihisa Kajima
- Department of Biophysical Chemistry Graduate School of Pharmaceutical Science, Tohoku University, 6-3 Aoba, Sendai, 980-8578, Japan
| | - Eito Toyama
- Department of Biophysical Chemistry Graduate School of Pharmaceutical Science, Tohoku University, 6-3 Aoba, Sendai, 980-8578, Japan
| | - Toshinobu Korenaga
- Department of Chemistry and Biological Sciences Faculty of Science and Engineering, Iwate University Ueda, Morioka, 020-8551, Japan.,Soft-Path Science and Engineering Research Center (SPERC), Iwate University, Ueda, Morioka, 020-8551, Japan
| | - Hiroyuki Yamakoshi
- Central Analytical Center, Graduate School of Pharmaceutical Science, Tohoku University, 6-3 Aoba, Sendai, 980-8578, Japan
| | - Kanako Nozawa-Kumada
- Department of Biophysical Chemistry Graduate School of Pharmaceutical Science, Tohoku University, 6-3 Aoba, Sendai, 980-8578, Japan
| | - Yoshinori Kondo
- Department of Biophysical Chemistry Graduate School of Pharmaceutical Science, Tohoku University, 6-3 Aoba, Sendai, 980-8578, Japan
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8
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Yadav M, Singh Jat R, Kumari S, Vijaya Babu P, Roy P, Bhanuchandra M. Transition-metal-free synthesis of 2-arylphenol via SNAr reaction of dibenzothiophene dioxide with KOH. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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9
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Ferreira J, Hood J, Klumpp DA. Condensations with biaryl ethers and carbonyl groups leading to spirocycles. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133123] [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]
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10
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Abdelbasset WK, Mohsen AM, Kadhim MM, Alkaim AF, Fakri Mustafa Y. Fabrication and Characterization of Copper (II) Complex Supported on Magnetic Nanoparticles as a Green and Efficient Nanomagnetic Catalyst for Synthesis of Diaryl Sulfones. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2083196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Walid Kamal Abdelbasset
- Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al Kharj, Saudi Arabia
- Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza, Egypt
| | - Ahmed M. Mohsen
- College of Science, Al-Qasim Green University, Department of biology, Al-Qasim, Iraq
| | - Mustafa M. Kadhim
- Department of Dentistry, Kut University College, Kut, Wasit, Iraq
- College of technical engineering, The Islamic University, Najaf, Iraq
- Department of Pharmacy, Osol Aldeen University College, Baghdad, Iraq
| | - Ayad F. Alkaim
- Chemistry Department, College of science for women, Hillah, Iraq
| | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, Iraq
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11
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Das S, Roy S, Bhowmik A, Sarkar W, Mondal I, Mishra A, Saha SJ, Karmakar S, Deb I. A radical-radical cross-coupling reaction of xanthene with sulfonyl hydrazides: facile access to xanthen-9-sulfone derivatives. Chem Commun (Camb) 2022; 58:2902-2905. [PMID: 35137745 DOI: 10.1039/d1cc07143b] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A straightforward strategy for direct incorporation of sulfonyl units into a xanthene moiety for accessing xanthen-9-sulfone derivatives in good to excellent yields has been established via metal-free radical-radical cross-coupling reaction of xanthenes and sulfonyl hydrazides. Using easily accessible starting materials, this methodology proceeds efficiently with a high degree of functional group compatibility and with a wide scope of both xanthenes and sulfonyl hydrazides under operationally simple reaction conditions. Mechanistic investigations revealed that sulfonyl radicals could be generated from sulfonyl hydrazides in the presence of TBHP under an oxygen atmosphere.
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Affiliation(s)
- Sumit Das
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Shantonu Roy
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Arup Bhowmik
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Writhabrata Sarkar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Imtiaj Mondal
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Aniket Mishra
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Shubhra Jyoti Saha
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Sudip Karmakar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Indubhusan Deb
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
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12
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Uematsu K, Hayasaka C, Takase K, Noguchi K, Nakano K. Transformation of Thia[7]helicene to Aza[7]helicenes and [7]Helicene-like Compounds via Aromatic Metamorphosis. Molecules 2022; 27:molecules27030606. [PMID: 35163875 PMCID: PMC8839769 DOI: 10.3390/molecules27030606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 11/27/2022] Open
Abstract
[n]Helicenes with helically twisted structures have attracted increasing interest owing to their unique properties. Therefore, it has been an important issue to develop facile synthetic methodologies which allow access to a variety of [n]helicenes. Here we report the synthesis of [7]helicenes and [7]helicene-like compounds from the thia[7]helicene as a common starting material. Desulfurative dilithiation of the thia[7]helicene and the subsequent reaction with silicon and phosphorus electrophiles afforded the silole- and phosphole-fused [7]helicene-like compounds, respectively. The cyclopentadiene-fused [7]helicene-like compound and the pyrrole-fused aza[7]helicenes were also successfully synthesized via twofold SNAr reactions of the thia[7]helicene S,S-dioxide with the carbon and nitrogen nucleophiles, respectively. The thia[7]helicene S,S-dioxide showed a slightly red-shifted absorption spectrum than the parent thia[7]helicene, which was well demonstrated by the theoretical calculations. The substituents on the silicon atom of silole-fused [7]helicene-like compounds have little impact on the longest absorption maximum. Such little effect of the substituents on absorption properties was also observed for cyclopentadiene-fused [7]helicene-like compounds and aza[7]helicenes and was well demonstrated by the theoretical calculations. The thia[7]helicene S,S-dioxide and the silole-fused [7]helicene-like compound exhibited bright blue emission, and the cyclopentadiene-fused [7]helicene-like compound and the aza[7]helicenes showed strong violet emission. Each single enantiomer of the aza[7]helicenes showed circularly-polarized luminescence with the dissymmetry factors of 4.2~4.4 × 10−3.
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Affiliation(s)
- Keisuke Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
| | - Chikara Hayasaka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
| | - Ko Takase
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
| | - Keiichi Noguchi
- Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan;
| | - Koji Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei 184-8588, Japan; (K.U.); (C.H.); (K.T.)
- Correspondence: ; Tel.: +81-42-388-7162
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13
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YORIMITSU H, PERRY GJP. Sulfonium-aided coupling of aromatic rings via sigmatropic rearrangement. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2022; 98:190-205. [PMID: 35400695 PMCID: PMC9071926 DOI: 10.2183/pjab.98.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Biaryl synthesis continues to occupy a central role in chemical synthesis. From blockbuster drug molecules to organic electronics, biaryls present numerous possibilities and new applications continue to emerge. Transition-metal-catalyzed coupling reactions represent the gold standard for biaryl synthesis and the mechanistic steps, such as reductive elimination, are well established. Developing routes that exploit alternative mechanistic scenarios could give unprecedented biaryl structures and expand the portfolio of biaryl applications. We have developed metal-free C-H/C-H couplings of aryl sulfoxides with phenols to afford 2-hydroxy-2'-sulfanylbiaryls. This cascade strategy consists of an interrupted Pummerer reaction and [3,3] sigmatropic rearrangement. Our method enables the synthesis of intriguing aromatic molecules, including oligoarenes, enantioenriched dihetero[8]helicenes, and polyfluorobiaryls. From our successes in aryl sulfoxide/phenol couplings and a deeper understanding of sigmatropic rearrangements for biaryl synthesis, we have established related methods, such as aryl sulfoxide/aniline and aryl iodane/phenol couplings. Overall, our fundamental interests in underexplored reaction mechanisms have led to various methods for accessing important biaryl architectures.
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Affiliation(s)
- Hideki YORIMITSU
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan
| | - Gregory J. P. PERRY
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan
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14
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Wei B, Qin JH, Yang YZ, Xie YX, Ouyang XH, Song RJ. Electrochemical radical C(sp3)–H arylation of xanthenes with electron-rich arenes. Org Chem Front 2022. [DOI: 10.1039/d1qo01714d] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient electrochemical C(sp3)–H arylation of xanthenes using a carbon anode and platinum cathode as the electrodes is disclosed.
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Affiliation(s)
- Bin Wei
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jing-Hao Qin
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Yong-Zheng Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Ye-Xiang Xie
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Xuan-Hui Ouyang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Ren-Jie Song
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
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15
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Maddala S, Panua A, Venkatakrishnan P. Steering Scholl Oxidative Heterocoupling by Tuning Topology and Electronics for Building Thiananographenes and Their Functional N-/C-Congeners. Chemistry 2021; 27:16013-16020. [PMID: 34459037 DOI: 10.1002/chem.202102920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Indexed: 12/14/2022]
Abstract
While intramolecular Scholl oxidative coupling between two arenes is common, successful C-C heterocoupling between thiophene and arene is scarce. The latter is due to the notorious reactivity of thiophene towards polymerization under oxidative conditions. This report systematically demonstrates how topological variation of electronics and reactivity in thiophene substrates can lead to efficient oxidative heterocoupling. Bis(biaryl)thiophenes having reactive α- and β-positions open are the choice of substrates. The cyclizing arene partners are so electronically tuned for thiophene's reactivity (at α- and β-) as to establish C-C bond oxidatively generating symmetrical as well as unsymmetrical diphenanthrothiophenes which are basic thiananographenes. Depending on the cyclizing-couple's electronics, either arene- or thiophene-centered oxidation initiates C-C heterocoupling. The potential utility of these simple thiananographenes is further unfurled by converting them to functional N-/C-graphene segments that are aza-corannulene precursor and tetrabenzospirobifluorene. Their bright emission and extended electrochemical stability are remarkable that may be potentially important and applicable.
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Affiliation(s)
- Sudhakar Maddala
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India
| | - Anirban Panua
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India
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16
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Furukawa T, Yanagi T, Kaga A, Saito H, Yorimitsu H. Construction of 5
H
‐Dibenzo[
c
,
e
]azepine Framework from Dibenzothiophene Dioxides and
N
‐Benzylimines through S
N
Ar Reactions. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tomoki Furukawa
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku, Kyoto 606-8502 Japan
| | - Tomoyuki Yanagi
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku, Kyoto 606-8502 Japan
| | - Atsushi Kaga
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku, Kyoto 606-8502 Japan
| | - Hayate Saito
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku, Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku, Kyoto 606-8502 Japan
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17
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Kumaran S, Parthasarathy K. Rh(III)-Catalyzed Oxidative C-2 Coupling of N-Pyridinylindoles with Benzo[ b]thiophene 1,1-Dioxides via C-H Bond Activation. J Org Chem 2021; 86:7987-7999. [PMID: 34096307 DOI: 10.1021/acs.joc.1c00301] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient Rh(III)-catalyzed cross-dehydrogenative coupling of N-pyridinylindoles with benzo[b]thiophene 1,1-dioxides has been developed through directing-group-assisted C-H activation. This transformation constructs a new C-C bond from two inert C-H bonds in a one-pot reaction. The present reaction is compatible with various functional groups with respect to indoles and benzothiophene[b] 1,1-dioxides. Furthermore, the emission properties of synthesized compounds have been explored.
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Affiliation(s)
- Subramani Kumaran
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu 600025, India
| | - Kanniyappan Parthasarathy
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu 600025, India
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18
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Kaga A, Iida H, Tsuchiya S, Saito H, Nakano K, Yorimitsu H. Aromatic Metamorphosis of Thiophenes by Means of Desulfurative Dilithiation. Chemistry 2021; 27:4567-4572. [PMID: 33349986 DOI: 10.1002/chem.202005223] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/16/2020] [Indexed: 12/24/2022]
Abstract
A new mode of aromatic metamorphosis has been developed, which allows thiophenes and their benzo-fused derivatives to be converted to a variety of exotic heteroles. This transformation involves 1) the efficient generation of key 1,4-dianions by means of desulfurative dilithiation with lithium powder and 2) the subsequent trapping of the dianions with heteroatom electrophiles in a one-pot manner. Via the desulfurative dilithiation, the sulfur atoms of thiophenes are replaced also with a carbon-carbon double bond or a 1,2-phenylene for the construction of benzene rings.
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Affiliation(s)
- Atsushi Kaga
- Department of Chemistry, Graduate School of Science, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Hirokazu Iida
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Shun Tsuchiya
- Department of Chemistry, Graduate School of Science, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Hayate Saito
- Department of Chemistry, Graduate School of Science, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Koji Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Sakyo-ku, Kyoto, 606-8502, Japan
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19
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Yuan H, Wei Y, Xie L, Huang W. One‐Pot
Synthesis of Spiro[fluorene‐9,9'‐xanthene] Derivatives. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000518] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hao‐Xuan Yuan
- Centre for Molecular Systems and Organic Devices (CMSOD) & Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) & Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT) 9 Wenyuan Road Nanjing Jiangsu 210023 China
| | - Ying Wei
- Centre for Molecular Systems and Organic Devices (CMSOD) & Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) & Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT) 9 Wenyuan Road Nanjing Jiangsu 210023 China
| | - Ling‐Hai Xie
- Centre for Molecular Systems and Organic Devices (CMSOD) & Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) & Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT) 9 Wenyuan Road Nanjing Jiangsu 210023 China
| | - Wei Huang
- Centre for Molecular Systems and Organic Devices (CMSOD) & Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) & Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT) 9 Wenyuan Road Nanjing Jiangsu 210023 China
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an Shaanxi 710072 China
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20
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Aslam M, Mohandoss S, Subramanian P, You S, Yang WG, Kim SH, Lee YR. Indium-Catalyzed Aromative Spiro Coupling of Quinones with Oxindoles for Highly Functionalized Xanthenes as Efficient Fluorophores. Org Lett 2021; 23:1383-1387. [PMID: 33529042 DOI: 10.1021/acs.orglett.1c00042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient and an efficient protocol for the assembly of diverse xanthenes bearing a biologically interesting oxindole nucleus is developed by utilizing the In(III)-catalyzed spiro coupling of 1,4-benzoquinones or 1,4-naphthoquinones with oxindoles. This novel protocol proceeds via a cascade of double Michael additions and intramolecular cyclization. The synthesized compounds have potential use as fluorophores for the selective imaging of heavy metals in living cells.
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Affiliation(s)
- Mohammad Aslam
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Palanisamy Subramanian
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneungdaehangno, Gangneung, Gangwon 25457, Republic of Korea
| | - SangGuan You
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneungdaehangno, Gangneung, Gangwon 25457, Republic of Korea
| | - Won-Guen Yang
- Analysis Research Division, Daegu Center, Korea Basic Science Institute, Daegu 41566, Republic of Korea
| | - Sung Hong Kim
- Analysis Research Division, Daegu Center, Korea Basic Science Institute, Daegu 41566, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
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21
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Shi Z, Chen S, Xiao Q, Yin D. Formation and Disproportionation of Xanthenols to Xanthenes and Xanthones and Their Use in Synthesis. J Org Chem 2021; 86:3334-3343. [PMID: 33400871 DOI: 10.1021/acs.joc.0c02694] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A facile and versatile strategy employing TiCl4-mediated cyclization followed by a Cannizzaro reaction has been developed for the synthesis of various xanthene derivatives. The reaction proceeded smoothly to afford both xanthenes/xanthones or their sulfur derivatives and tolerated a wide range of electronically diverse substrates. Using this methodology, pranoprofen was synthesized in three steps in 59% overall yield from commercially available starting materials.
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Affiliation(s)
- Zeyu Shi
- Department of Medicinal Chemistry, State Key Laboratory of Bioactive Substance and Function of Natural Medicines & Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Si Chen
- Department of Medicinal Chemistry, State Key Laboratory of Bioactive Substance and Function of Natural Medicines & Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Qiong Xiao
- Department of Medicinal Chemistry, State Key Laboratory of Bioactive Substance and Function of Natural Medicines & Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Dali Yin
- Department of Medicinal Chemistry, State Key Laboratory of Bioactive Substance and Function of Natural Medicines & Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
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22
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Shigeno M, Kajima A, Nakaji K, Nozawa-Kumada K, Kondo Y. Catalytic amide base system generated in situ for 1,3-diene formation from allylbenzenes and carbonyls. Org Biomol Chem 2021; 19:983-987. [PMID: 33146220 DOI: 10.1039/d0ob02007a] [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
The amide base generated in situ from tetramethylammonium fluoride and N(TMS)3 catalyzes the synthesis of 1,3-diene from an allylbenzene and carbonyl compound. The system is applicable to the transformations of a variety of allylbenzenes with functional groups (halogen, methyl, phenyl, methoxy, dimethylamino, ester, and amide moieties). Acyclic and cyclic diaryl ketones, pivalophenone, pivalaldehyde, and isobutyrophenone are used as coupling partners. The role of transβ-methyl stilbenes in product formation is also elucidated.
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Affiliation(s)
- Masanori Shigeno
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan.
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23
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Yanagi T, Tanaka T, Yorimitsu H. Asymmetric systematic synthesis, structures, and (chir)optical properties of a series of dihetero[8]helicenes. Chem Sci 2021; 12:2784-2793. [PMID: 34164042 PMCID: PMC8179410 DOI: 10.1039/d1sc00044f] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 01/28/2021] [Indexed: 01/22/2023] Open
Abstract
A series of dihetero[8]helicenes have been systematically synthesized in enantiomerically enriched forms by utilizing the characteristic transformations of the organosulfur functionality. The synthetic route begins with assembling a ternaphthyl common synthetic intermediate from 2-naphthol and bissulfinylnaphthalene through an extended Pummerer reaction followed by facile multi-gram-scale resolution. The subsequent cyclization reactions into dioxa- and dithia[8]helicenes take place with excellent axial-to-helical chirality conversion. Dithia[8]helicene is further transformed into the nitrogen and the carbon analogs by replacing the two endocyclic sulfur atoms via SNAr-based skeletal reconstruction. The efficient systematic synthesis has enabled comprehensive evaluation of physical properties, which has clarified the effect of the endocyclic atoms on their structures and (chir)optical properties as well as the unexpected conformational stability of the common helical framework.
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Affiliation(s)
- Tomoyuki Yanagi
- Department of Chemistry, Graduate School of Science, Kyoto University Japan
| | - Takayuki Tanaka
- Department of Chemistry, Graduate School of Science, Kyoto University Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University Japan
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24
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Affiliation(s)
- Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science Kyoto University Kyoto Japan
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25
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Abstract
High-valent oxocobalt(IV) species have been invoked as key intermediates in oxidative catalysis, but investigations into the chemistry of proton-coupled redox reactions of such species have been limited. Herein, the reactivity of an established water oxidation catalyst, [Co4O4(OAc)4(py)4][PF6], toward H-atom abstraction reactions is described. Mechanistic analyses and density functional theory (DFT) calculations support a concerted proton-electron transfer (CPET) pathway in which the high energy intermediates formed in stepwise pathways are bypassed. Natural bond orbital (NBO) calculations point to cooperative donor-acceptor σ interactions at the transition state, whereby the H-atom of the substrate is transferred to an orbital delocalized over a Co3(μ3-O) fragment. The mechanistic insights provide design principles for the development of catalytic C-H activation processes mediated by a multimetallic oxo metal cluster.
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26
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Matsuo Y, Tanaka T, Osuka A. Diazadimethano[8]circulene: Synthesis, Structure, Properties, and Isolation of Stable Radical Cation. CHEM LETT 2020. [DOI: 10.1246/cl.200336] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yusuke Matsuo
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takayuki Tanaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Atsuhiro Osuka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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27
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Miyake Y, Shinokubo H. Hetero[8]circulenes: synthetic progress and intrinsic properties. Chem Commun (Camb) 2020; 56:15605-15614. [DOI: 10.1039/d0cc06495e] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthetic route for hetero[8]circulenes are classified into the annulative construction of eight-membered ring and the peripheral ring fusion of eight-membered ring. Post-transformation enables the tuning of structural features and electronic nature.
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Affiliation(s)
- Yoshihiro Miyake
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Hiroshi Shinokubo
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
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28
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Kaga A, Nogi K, Yorimitsu H. Synthesis of N-Alkyl and N-H-Carbazoles through S N Ar-Based Aminations of Dibenzothiophene Dioxides. Chemistry 2019; 25:14780-14784. [PMID: 31553094 DOI: 10.1002/chem.201903916] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/24/2019] [Indexed: 12/24/2022]
Abstract
Alkyl amines have become available for the synthesis of diverse N-alkyl carbazoles through twofold SN Ar aminations of dibenzothiophene dioxides by using alkali metal bases. Of particular importance is the choice of counter cations on alkali metal bases, that is, i) the use of Li base for the efficient intermolecular reaction and ii) the sequential addition of heavier alkali metal bases (Na, K, or Cs) to promote intramolecular cyclization in a one-pot manner. This protocol also enables the cascade synthesis of N-H-carbazoles by using 2-phenylethylamine by removal of the 2-phenethyl group from N-(2-phenethyl) carbazoles in a single operation.
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Affiliation(s)
- Atsushi Kaga
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Keisuke Nogi
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
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29
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Zhou Y, Lin L, Wang Y, Zhu J, Song Q. Cu-Catalyzed Aromatic Metamorphosis of 3-Aminoindazoles. Org Lett 2019; 21:7630-7634. [PMID: 31503499 DOI: 10.1021/acs.orglett.9b02933] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We present a novel Cu-catalyzed aromatic metamorphosis of 3-aminoindazoles via oxidative cleavage of two C-N bonds of 3-aminoindazoles. This unprecedented reactivity of 3-aminoindazoles allows one to forge diverse nitrile-containing triphenylenes in decent yields via generation of the cyano group in situ. The current study reveals that 3-aminoindazoles could be harnessed as radical precursors via oxidative denitrogenation, the reaction mechanism of which was supported by density functional theory calculations.
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Affiliation(s)
- Yao Zhou
- Institute of Next Generation Matter Transformation , College of Materials Science & Engineering at Huaqiao University , 668 Jimei Blvd. , Xiamen , Fujian 361021 , People's Republic of China
| | - Lu Lin
- College of Chemistry and Chemical Engineering at Xiamen University , Xiamen , Fujian 361005 , People's Republic of China
| | - Ya Wang
- Institute of Next Generation Matter Transformation , College of Materials Science & Engineering at Huaqiao University , 668 Jimei Blvd. , Xiamen , Fujian 361021 , People's Republic of China
| | - Jun Zhu
- College of Chemistry and Chemical Engineering at Xiamen University , Xiamen , Fujian 361005 , People's Republic of China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation , College of Materials Science & Engineering at Huaqiao University , 668 Jimei Blvd. , Xiamen , Fujian 361021 , People's Republic of China.,Key Laboratory of Molecule Synthesis and Function Discovery , College of Chemistry at Fuzhou University , Fuzhou , Fujian 350108 , People's Republic of China
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30
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Saito H, Yorimitsu H. Ring-expanding and Ring-opening Transformations of Benzofurans and Indoles with Introducing Heteroatoms. CHEM LETT 2019. [DOI: 10.1246/cl.190393] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hayate Saito
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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31
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Tsuchiya S, Saito H, Nogi K, Yorimitsu H. Aromatic Metamorphosis of Indoles into 1,2-Benzazaborins. Org Lett 2019; 21:3855-3860. [PMID: 31063386 DOI: 10.1021/acs.orglett.9b01353] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Among the plethora of aromatic compounds, indoles represent a privileged class of substructures that is ubiquitous in natural products and pharmaceuticals. While numerous exocyclic functionalizations of indoles have provided access to a variety of useful derivatives, endocyclic transformations involving the cleavage of the C2-N bond remain challenging due to the high aromaticity and strength of this bond in indoles. Herein, we report the "aromatic metamorphosis" of indoles into 1,2-benzazaborins via the insertion of boron into the C2-N bond. This endocyclic insertion consists of a reductive ring-opening using lithium metal and a subsequent trapping of the resulting dianionic species with organoboronic esters. Considering that 1,2-azaborins have attracted increasing academic and industrial attention as BN isosteres of benzene, the counterintuitive aromatic metamorphosis presented herein can feasibly be expected to substantially advance the promising chemistry of 1,2-azaborins.
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Affiliation(s)
- Shun Tsuchiya
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo-ku, Kyoto 606-8502 , Japan
| | - Hayate Saito
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo-ku, Kyoto 606-8502 , Japan
| | - Keisuke Nogi
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo-ku, Kyoto 606-8502 , Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo-ku, Kyoto 606-8502 , Japan
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32
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Shigeno M, Nakaji K, Nozawa-Kumada K, Kondo Y. Catalytic Amide–Base System of TMAF and N(TMS)3 for Deprotonative Coupling of Benzylic C(sp3)–H Bonds with Carbonyls. Org Lett 2019; 21:2588-2592. [DOI: 10.1021/acs.orglett.9b00550] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Masanori Shigeno
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Kunihito Nakaji
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Kanako Nozawa-Kumada
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Yoshinori Kondo
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
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33
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Mylavarapu S, Yadav M, Bhanuchandra M. KHMDS mediated synthesis of 9-arylfluorenes from dibenzothiophene dioxides and arylacetonitriles by tandem S NAr-decyanation-based arylation. Org Biomol Chem 2019; 16:7815-7819. [PMID: 30328877 DOI: 10.1039/c8ob02355g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A straightforward KHMDS mediated synthetic route to 9-arylfluorenes from readily available starting materials has been developed. This reaction involves SNAr reactions of dioxide with arylacetonitriles, followed by decyanation reaction. The proposed transformation can also be used to furnish a densely arylated indene.
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Affiliation(s)
- Saketh Mylavarapu
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Rajasthan-305 817, India.
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34
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Karunakaran J, Manikandan P, Sathish M, Mohanakrishnan AK. Synthesis of Thiophene S,S
-dioxide Based Acenes via Diels-Alder Reaction of Isobenzofurans with Benzothiophene S,S
-dioxides. ChemistrySelect 2018. [DOI: 10.1002/slct.201802421] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jayachandran Karunakaran
- Department of Organic Chemistry; University of Madras; Guindy Campus; Chennai 600 025, Tamil Nadu India
| | - Palani Manikandan
- Department of Organic Chemistry; University of Madras; Guindy Campus; Chennai 600 025, Tamil Nadu India
| | - Murugan Sathish
- Department of Organic Chemistry; University of Madras; Guindy Campus; Chennai 600 025, Tamil Nadu India
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35
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Nogi K, Yorimitsu H. Aromatic metamorphosis: conversion of an aromatic skeleton into a different ring system. Chem Commun (Camb) 2018; 53:4055-4065. [PMID: 28225122 DOI: 10.1039/c7cc00078b] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Aromatic skeletons are generally regarded as being uncleavable because of their aromatic stabilization energy. Compared to exocyclic functionalizations of aromatic compounds, much less attention has been paid to substitutions of endocyclic atoms in aromatic cores through partial disassembly of the cyclic skeletons and subsequent ring reconstruction. In this Feature Article, we describe our endeavours to establish "aromatic metamorphosis", where general aromatic compounds such as dibenzothiophenes, dibenzofurans, and benzofurans are transformed into different ring systems using a multi-step strategy or ideally in one step.
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Affiliation(s)
- Keisuke Nogi
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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36
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N-Heterocyclic Carbene-Catalyzed Double Michael Addition: Stereoselective Synthesis of Spirofluorenes and Multisubstituted Indanes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701269] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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37
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Govindan V, Yang KC, Fu YS, Wu CG. Low-cost synthesis of heterocyclic spiro-type hole transporting materials for perovskite solar cell applications. NEW J CHEM 2018. [DOI: 10.1039/c8nj01082j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The new spirobased PSC used HTM SFX-TPAM with good photovoltaic performance was prepared through low cost facile route.
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Affiliation(s)
| | - Kai-Cheng Yang
- Department of Chemistry
- National Central University
- Jhong-Li
- Republic of China
| | - Yung-Sheng Fu
- Department of Chemistry
- National Central University
- Jhong-Li
- Republic of China
| | - Chun-Guey Wu
- Department of Chemistry
- National Central University
- Jhong-Li
- Republic of China
- Research Center for New Generation Photovoltaics
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38
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Sankar E, Raju P, Karunakaran J, Mohanakrishnan AK. Synthetic Utility of Arylmethylsulfones: Annulative π-Extension of Aromatics and Hetero-aromatics Involving Pd(0)-Catalyzed Heck Coupling Reactions. J Org Chem 2017; 82:13583-13593. [DOI: 10.1021/acs.joc.7b01813] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Elumalai Sankar
- Department of Organic Chemistry, School
of Chemistry, University of Madras Guindy Campus, Chennai 600 025, Tamil Nadu, India
| | - Potharaju Raju
- Department of Organic Chemistry, School
of Chemistry, University of Madras Guindy Campus, Chennai 600 025, Tamil Nadu, India
| | - Jayachandran Karunakaran
- Department of Organic Chemistry, School
of Chemistry, University of Madras Guindy Campus, Chennai 600 025, Tamil Nadu, India
| | - Arasambattu K. Mohanakrishnan
- Department of Organic Chemistry, School
of Chemistry, University of Madras Guindy Campus, Chennai 600 025, Tamil Nadu, India
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39
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Gao G, Liang N, Geng H, Jiang W, Fu H, Feng J, Hou J, Feng X, Wang Z. Spiro-Fused Perylene Diimide Arrays. J Am Chem Soc 2017; 139:15914-15920. [DOI: 10.1021/jacs.7b09140] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Guangpeng Gao
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Ningning Liang
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Hua Geng
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Wei Jiang
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Huiting Fu
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jiajing Feng
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jianhui Hou
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Xinliang Feng
- Center for Advancing Electronics Dresden & Department of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden 01062, Germany
| | - Zhaohui Wang
- CAS
Research/Education Center for Excellence in Molecular Sciences, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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40
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Tsuchiya S, Saito H, Nogi K, Yorimitsu H. Manganese-Catalyzed Ring Opening of Benzofurans and Its Application to Insertion of Heteroatoms into the C2-O Bond. Org Lett 2017; 19:5557-5560. [PMID: 28960079 DOI: 10.1021/acs.orglett.7b02660] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new class of aromatic metamorphosis in which benzofurans are converted into diverse six-membered oxaheterocycles has been developed. This transformation is composed of two reactions in one pot: manganese-catalyzed arylative or alkylative ring-opening of benzofurans affording dianionic intermediates and subsequent trapping with multivalent heteroatom electrophiles. Various electrophiles containing silicon, boron, phosphorus, germanium, and titanium could be applied to this heteroatom insertion.
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Affiliation(s)
- Shun Tsuchiya
- Department of Chemistry, Graduate School of Science, Kyoto University , Sakyo-ku, Kyoto 606-8502, Japan
| | - Hayate Saito
- Department of Chemistry, Graduate School of Science, Kyoto University , Sakyo-ku, Kyoto 606-8502, Japan
| | - Keisuke Nogi
- Department of Chemistry, Graduate School of Science, Kyoto University , Sakyo-ku, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University , Sakyo-ku, Kyoto 606-8502, Japan
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41
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Kurata Y, Otsuka S, Fukui N, Nogi K, Yorimitsu H, Osuka A. Aromatic Metamorphosis of Dibenzofurans into Triphenylenes Starting with Nickel-Catalyzed Ring-Opening C–O Arylation. Org Lett 2017; 19:1274-1277. [DOI: 10.1021/acs.orglett.6b03861] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuto Kurata
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shinya Otsuka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Norihito Fukui
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Keisuke Nogi
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Atsuhiro Osuka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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42
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Onoda M, Koyanagi Y, Saito H, Bhanuchandra M, Matano Y, Yorimitsu H. Synthesis of Dibenzophosphole Oxides from Dibenzothiophene Dioxides and Phenylphosphine by Two Successive SN
Ar Reactions. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201600612] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Mitsuki Onoda
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Yoshinari Koyanagi
- Department of Fundamental Sciences; Graduate School of Science and Technology; Niigata University; Nishi-ku Niigata 950-2181 Japan
| | - Hayate Saito
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - M. Bhanuchandra
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Yoshihiro Matano
- Department of Chemistry; Faculty of Science; Niigata University; Nishi-ku Niigata 950-2181 Japan
| | - Hideki Yorimitsu
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
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43
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Saito H, Otsuka S, Nogi K, Yorimitsu H. Nickel-Catalyzed Boron Insertion into the C2–O Bond of Benzofurans. J Am Chem Soc 2016; 138:15315-15318. [DOI: 10.1021/jacs.6b10255] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hayate Saito
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shinya Otsuka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Keisuke Nogi
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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