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Taguchi J, Okuyama T, Tomita S, Niwa T, Hosoya T. Synthesis of Multisubstituted Aromatics via 3-Triazenylarynes. Org Lett 2023; 25:7030-7034. [PMID: 37712445 DOI: 10.1021/acs.orglett.3c02615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
An efficient method for generating 3-triazenylarynes from ortho-iodoaryl triflate-type precursors was developed. The generated arynes reacted with various arynophiles with high regioselectivity because of the triazenyl group. The 3-triazenylaryne precursors functioned as useful intermediates of diverse multisubstituted aromatic compounds through the transformation of the remaining triazenyl group of aryne adducts and triazenyl group-directed ortho-C-H functionalization.
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Affiliation(s)
- Jumpei Taguchi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takumi Okuyama
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Satomi Tomita
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takashi Niwa
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe 650-0047, Japan
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe 650-0047, Japan
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Miyabe H. Regiocontrol by Halogen Substituent on Arynes: Generation of 3-Haloarynes and Their Synthetic Reactions. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1814-9853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractThe use of arynes as highly reactive intermediates has attracted substantial attention in organic synthesis. To enhance the utility of arynes, the regiocontrol in the reactions of unsymmetrically substituted arynes is an important task. The introduction of halogen substituent at 3-position of arynes leads to sufficient regiocontrol for various synthetic reactions. This short review highlights the utility of 3-haloarynes in organic synthesis and discusses the distortion models used to explain regioselectivity, representative reactions of 3-haloarynes generated from polyhaloarenes, and the preparation and reactions of easily activatable aryne precursors.1 Introduction2 Distortion Models3 Reaction of Precursors Activated by an Organometallic Reagent or Base4 Preparation of Easily Activatable Precursors5 Reactions of Easily Activatable Precursors6 Concluding Remarks
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Taguchi J, Kimura K, Igawa K, Tomooka K, Hosoya T. 3-Azidoarynes: Generation and Regioselective Reactions. CHEM LETT 2021. [DOI: 10.1246/cl.210632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jumpei Taguchi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kota Kimura
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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Bembenek BM, Petersen MMS, Lilly JA, Haugen AL, Jiter NJ, Johnson AJ, Ripp EE, Winchell SA, Harvat AN, McNulty C, Thein SA, Grieger AM, Lyle BJ, Mraz GL, Stitgen AM, Foss S, Schmid ML, Scanlon JD, Willoughby PH. The Aryne-Abramov Reaction as a 1,2-Benzdiyne Platform for the Generation and Solvent-Dependent Trapping of 3-Phosphonyl Benzynes. J Org Chem 2021; 86:10724-10746. [PMID: 34236859 DOI: 10.1021/acs.joc.1c01382] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Synthetic methodology utilizing two aryne intermediates (i.e., a formal benzdiyne) enables the rapid generation of structurally complex molecules with diverse functionality. This report describes the sequential generation of two ortho-benzyne intermediates for the synthesis of 2,3-disubstituted aryl phosphonates. Aryl phosphonates have proven useful in medicinal chemistry and materials science, and the reported methodology provides a two-step route to functionally dense variants by way of 3-phosphonyl benzyne intermediates. The process begins with regioselective trapping of a 3-trifloxybenzyne intermediate by an O-silyl phosphite in an Abramov-like reaction to bond the strained Csp carbons with phosphorus and silicon. Standard aryne-generating conditions follow to convert the resulting 2-silylphenyl triflate into a 3-phosphonyl benzyne, which readily reacts with numerous aryne trapping reactants to form a variety of 2,3-difunctionalized aryl phosphonate products. DFT computational studies shed light on important mechanistic details and revealed that 3-phosphonyl benzynes are highly polarizable. Specifically, the distortion in the internal bond angles at each of the Csp atoms was strongly influenced by both the electronegativity of the phosphonate ester groups as well as the dielectric of the computational solvation model. These effects were verified experimentally as the regioselectivity of benzyl azide trapping increased with more electronegative esters and/or increasingly polar solvents. Conversely, replacing the conventional solvent, acetonitrile, with nonpolar alternatives provided attenuated or even inverted selectivities. Overall, these studies showcase new reactivity of benzyne intermediates and extend the aryne relay methodology to include organophosphonates. Furthermore, this work demonstrates that the regioselectivity of aryne trapping reactions could be tuned by simply changing the solvent.
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Affiliation(s)
- Brianna M Bembenek
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Maya M S Petersen
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Julia A Lilly
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Amber L Haugen
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Naomi J Jiter
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Andrew J Johnson
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Ethan E Ripp
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Shelby A Winchell
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Alisha N Harvat
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Caitlin McNulty
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Sierra A Thein
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Abbigail M Grieger
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Brandon J Lyle
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Gabriella L Mraz
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Abigail M Stitgen
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Samuel Foss
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Merranda L Schmid
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Joseph D Scanlon
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
| | - Patrick H Willoughby
- Chemistry Department, Ripon College, 300 West Seward Street, Ripon, Wisconsin 54971, United States
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