101
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Tobisu M, Masuya Y, Baba K, Chatani N. Palladium(ii)-catalyzed synthesis of dibenzothiophene derivatives via the cleavage of carbon-sulfur and carbon-hydrogen bonds. Chem Sci 2016; 7:2587-2591. [PMID: 28660030 PMCID: PMC5477049 DOI: 10.1039/c5sc04890g] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 01/21/2016] [Indexed: 01/16/2023] Open
Abstract
A new process has been developed for the palladium(ii)-catalyzed synthesis of dibenzothiophene derivatives via the cleavage of C-H and C-S bonds. In contrast to the existing methods for the synthesis of this scaffold by C-H functionalization, this new catalytic C-H/C-S coupling method does not require the presence of an external stoichiometric oxidant or reactive functionalities such as C-X or S-H, allowing its application to the synthesis of elaborate π-systems. Notably, the product-forming step of this reaction lies in an oxidative addition step rather than a reductive elimination step, making this reaction mechanistically uncommon.
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Affiliation(s)
- Mamoru Tobisu
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
- Center for Atomic and Molecular Technologies , Graduate School of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan
| | - Yoshihiro Masuya
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
| | - Katsuaki Baba
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
| | - Naoto Chatani
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan . ;
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102
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Wang SM, Wang XY, Qin HL, Zhang CP. Palladium-Catalyzed Arylation of Arylboronic Acids with Yagupolskii-Umemoto Reagents. Chemistry 2016; 22:6542-6. [PMID: 26946261 DOI: 10.1002/chem.201600991] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Indexed: 12/20/2022]
Abstract
A Pd-catalyzed Suzuki cross-coupling of arylboronic acids with Yagupolskii-Umemoto reagents was explored. In contrary to trifluoromethylations, the Pd-catalyzed reaction of R-B(OH)2 and [Ar2 SCF3 ](+) [OTf](-) provided the arylation products (R-Ar) in good to high yields. The reaction confirms that the S-Ar bonds of [Ar2 SCF3 ](+) [OTf](-) can be readily cleaved in the presence of Pd complexes. The relatively electron-poor aryl groups of asymmetric [Ar(1) Ar(2) SCF3 ](+) [OTf](-) salts are more favorably transferred compared to the electron-rich ones. This reaction represents the first report of utilization of [Ar2 SCF3 ](+) [OTf](-) as arylation reagents in organic synthesis.
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Affiliation(s)
- Shi-Meng Wang
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, P. R. China
| | - Xiao-Yan Wang
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, P. R. China
| | - Hua-Li Qin
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, P. R. China
| | - Cheng-Pan Zhang
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, P. R. China.
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103
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Hideki Yorimitsu. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201508279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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104
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Hideki Yorimitsu. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508279] [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]
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105
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Bhanuchandra M, Yorimitsu H, Osuka A. Synthesis of Spirocyclic Diarylfluorenes by One-Pot Twofold SNAr Reactions of Diaryl Sulfones with Diarylmethanes. Org Lett 2016; 18:384-7. [PMID: 26744785 DOI: 10.1021/acs.orglett.5b03384] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Treatment of dibenzothiophene dioxides with cyclic diarylmethanes in the presence of KN(SiMe3)2 results in the formation of fluorene-based spirocyclic tetraarylmethanes in a single operation. The transformation would proceed via an intermolecular SNAr reaction of the dioxides with cyclic diarylmethylpotassium followed by intramolecular SNAr cyclization. This straightforward strategy provides a wide range of spirocyclic diarylfluorenes including unusual ones that are otherwise difficult to synthesize.
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Affiliation(s)
- M Bhanuchandra
- 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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106
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Ruch AA, Handa S, Kong F, Nesterov VN, Pahls DR, Cundari TR, Slaughter LM. Competing amination and C–H arylation pathways in Pd/xantphos-catalyzed transformations of binaphthyl triflates: switchable routes to chiral amines and helicene derivatives. Org Biomol Chem 2016; 14:8123-40. [DOI: 10.1039/c6ob01102k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A Pd(OAc)2/xantphos catalyst system can be tuned to promote either amination or C–H arylation of hindered binaphthyl 2-triflates, with xantphos's hemilability playing a key role.
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Affiliation(s)
- Aaron A. Ruch
- Department of Chemistry
- University of North Texas
- Denton
- USA
| | - Sachin Handa
- Department of Chemistry
- Oklahoma State University Stillwater
- Oklahoma
- USA
| | - Fanji Kong
- Department of Chemistry
- University of North Texas
- Denton
- USA
| | | | - Dale R. Pahls
- Department of Chemistry
- University of North Texas
- Denton
- USA
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107
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Iwasaki M, Araki Y, Iino S, Nishihara Y. Synthesis of Multisubstituted Triphenylenes and Phenanthrenes by Cascade Reaction of o-Iodobiphenyls or (Z)-β-Halostyrenes with o-Bromobenzyl Alcohols through Two Sequential C–C Bond Formations Catalyzed by a Palladium Complex. J Org Chem 2015; 80:9247-63. [DOI: 10.1021/acs.joc.5b01693] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Masayuki Iwasaki
- Division
of Earth, Life, and Molecular Sciences, Graduate School of Natural
Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Yasuhiro Araki
- Division
of Earth, Life, and Molecular Sciences, Graduate School of Natural
Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Shohei Iino
- Division
of Earth, Life, and Molecular Sciences, Graduate School of Natural
Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Yasushi Nishihara
- Division
of Earth, Life, and Molecular Sciences, Graduate School of Natural
Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
- ACT-C, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan
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108
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Barrett MJ, Davies PW, Grainger RS. Regioselective functionalisation of dibenzothiophenes through gold-catalysed intermolecular alkyne oxyarylation. Org Biomol Chem 2015; 13:8676-86. [PMID: 26177794 DOI: 10.1039/c5ob01241d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A protocol has been developed for direct Csp(3)-Csp(2) bond formation at the 4- and 6-positions of dibenzothiophenes using a gold(I) catalyst with terminal alkynes and dibenzothiophene-S-oxides. The sulfoxide acts as a traceless directing group to avoid the need to prefunctionalise at carbon. The iterative use of this protocol is possible and has been employed in the preparation of novel macrocyclic structures. In addition, a cascade process shows how oxyarylations can be combined with other processes resulting in complex, highly efficient transformations.
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Affiliation(s)
- Matthew J Barrett
- School of Chemistry, University of Birmingham, Haworth Building, Edgbaston, Birmingham, B15 2TT, UK.
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109
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Bhanuchandra M, Murakami K, Vasu D, Yorimitsu H, Osuka A. Transition-Metal-Free Synthesis of Carbazoles and Indoles by an SNAr-Based “Aromatic Metamorphosis” of Thiaarenes. Angew Chem Int Ed Engl 2015; 54:10234-8. [DOI: 10.1002/anie.201503671] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Indexed: 12/23/2022]
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110
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Bhanuchandra M, Murakami K, Vasu D, Yorimitsu H, Osuka A. Transition-Metal-Free Synthesis of Carbazoles and Indoles by an SNAr-Based “Aromatic Metamorphosis” of Thiaarenes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503671] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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