1
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Feng M, Huang B, Jiang H, Huang L. Synthesis of γ-Thiapyrones by Diels-Alder/Retro-Diels-Alder Reaction of α-Pyrones with 5- H-1,2,3-Thiadiazoles. J Org Chem 2024; 89:5846-5850. [PMID: 38584435 DOI: 10.1021/acs.joc.3c02889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
The efficient synthesis of γ-thiapyrones by a base-mediated Diels-Alder/retro-Diels-Alder reaction of α-pyrones with 5-H-1,2,3-thiadiazoles is reported herein. Thioketenes in situ generated from thiadiazoles as electron-poor dienophile and electron-rich 4-hydroxy-2-pyrones as dienes are conjunctively transformed into a series of γ-thiapyrones with broad functional group compatibility in good to excellent yields (35 examples, 67% average yield).
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Affiliation(s)
- Mengxia Feng
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Bin Huang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Liangbin Huang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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2
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Akter M, Rupa K, Anbarasan P. 1,2,3-Triazole and Its Analogues: New Surrogates for Diazo Compounds. Chem Rev 2022; 122:13108-13205. [DOI: 10.1021/acs.chemrev.1c00991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Monalisa Akter
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Kavuri Rupa
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Pazhamalai Anbarasan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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3
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Abstract
Treatment of 3,4-(ClC(O))2-cC4H2S (1) with [FcCH2OLi] (2-Li) (Fc = Fe(η5-C5H5)(η5-C5H4)) in a 1:2 ratio gave 3,4-(FcCH2OC(O))2-cC4H2S (3). Compound 3 decomposes in solution during crystallization to produce FcCH2OH (2) along with 3,4-thiophenedicarboxylic anhydride (4). The cyclic voltammogram of 3 exhibits a reversible ferrocene-related redox couple (E1/2 = 108 mV, vs. Cp2Fe/Cp2Fe+) using [NnBu4] [B(C6F5)4] as the supporting electrolyte. DFT calculations reveal that the energy values of the LUMO orbitals of 3 (3,4-thiophene core) show 1 eV higher energies than that one of 2,5-(FcCH2OC(O))2-cC4H2S (5), both compounds’ HOMO orbitals are close to each other. Compound 4 was characterized by single X-ray structure analysis. It forms a band-type structure based on intermolecular O1···S1 interactions being parallel to (110) and (1–10) in the solid state, while electrostatic C···O interactions between the C=O functionalities of adjacent molecules connect both 3D-networks. Hirshfeld surface analysis was used to gain more insight into the intermolecular interactions in 4, the enrichment ratios (E) suggest that O···H, S···S, and O···C are the most favored intermolecular interactions, as shown by E values above 1.20. The relevance of the weak O···H, O···O, and O···C contacts in stabilizing the molecular structure of 4 was highlighted by the interaction energies between molecular pairs.
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4
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Tokareva MA, Pernik I, Lewis W, Messerle BA, Glukhareva TV, Keaveney ST. Rh(I)-Catalyzed Denitrogenative Transformations of 1,2,3-Thiadiazoles: Ligand-Controlled Product Selectivity and the Structure of the Key Organorhodium Intermediate Revealed. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01175] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Marina A. Tokareva
- Institute of Chemical Technology, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation
- School of Natural Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Indrek Pernik
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - William Lewis
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Analytical, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Barbara A. Messerle
- School of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Tatiana V. Glukhareva
- Institute of Chemical Technology, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences (UB RAS), 22 Sofia Kovalevskaya Street, Yekaterinburg, 620990, Russian Federation
| | - Sinead T. Keaveney
- School of Natural Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
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5
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Chen C, Fang S, Dong Z, Xu J, Yang Z. Catalytic Diastereospecific and Enantioselective (3 + 2) Transannulations of 1,2,3-Thiadiazoles with Strained Norbornene Derivatives. Org Lett 2022; 24:2110-2114. [PMID: 35274965 DOI: 10.1021/acs.orglett.2c00330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the adoption of a ring-strain-release strategy, iridium-catalyzed transannulations with norbornene derivatives are achieved in a diastereospecific and enantioselective manner. The first asymmetric transannulations of 1,2,3-thiadiazoles are reported.
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Affiliation(s)
- Cunzhi Chen
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Shuyan Fang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Ziyang Dong
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jiaxi Xu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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6
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Wu Q, Chen N, Xu J. Chemoselectivity in the Transannulaction of 1,2,3‐Thiadiazoles and Alk‐2‐enenitriles: Specific Synthesis of 3‐(Alk‐1‐enyl)isothiazoles. ChemistrySelect 2022. [DOI: 10.1002/slct.202103943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiuyue Wu
- State Key Laboratory of Chemical Resource Engineering Department of Organic Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Ning Chen
- State Key Laboratory of Chemical Resource Engineering Department of Organic Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering Department of Organic Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 People's Republic of China
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7
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Feng M, Jiang H, Huang L. Silver-mediated annulation between 5- H-1,2,3-thiadiazoles and 1,3-dicarbonyl compounds to construct polysubstituted furans. Org Chem Front 2022. [DOI: 10.1039/d2qo01224c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient synthesis of polysubstituted furans by Ag(i)-mediated annulation between 5-H-1,2,3-thiadiazoles and 1,3-dicarbonyl compounds is reported.
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Affiliation(s)
- Mengxia Feng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Liangbin Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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8
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Dong Z, Ma MY, Xu J, Yang Z. Catalytic (3 + 2) umpolung annulations of α-thioacyl carbenes with aryl isothiocyanates. Chem Commun (Camb) 2022; 58:7980-7983. [DOI: 10.1039/d2cc02882d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
As masked S-electrophilic thia-1,3-dipoles, 1,2,3-thiadiazoles undergo denitrogenative (3 + 2) umpolung transannulations with aryl isothiocyanates, regio- and stereoselectively.
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Affiliation(s)
- Ziyang Dong
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Meng-Yao Ma
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jiaxi Xu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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9
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Wu Q, Dong Z, Xu J, Yang Z. Sulfur-controlled and rhodium-catalyzed formal (3 + 3) transannulation of thioacyl carbenes with alk-2-enals and mechanistic insights. Org Biomol Chem 2021; 19:3173-3180. [PMID: 33885571 DOI: 10.1039/d1ob00116g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A rhodium-catalyzed denitrogenative formal (3 + 3) transannulation of 1,2,3-thiadiazoles with alk-2-enals is achieved, producing 2,3-dihydrothiopyran-4-ones in moderate to excellent yields. An inverse KIE of 0.49 is obtained, suggesting the reversibility of the oxidative addition of thioacyl Rh(i) carbenes to alk-2-enals. The late-stage structural modifications of steroid compounds are realized. Moreover, our studies show that thioacyl carbenes have different reactivities to those of α-oxo and α-imino carbenes, and highlight the importance of heteroatoms in deciding the reactivities of heterovinyl carbenes.
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Affiliation(s)
- Qiuyue Wu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
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10
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El-Sawy ER, Abdelwahab AB, Kirsch G. Synthetic Routes to Coumarin(Benzopyrone)-Fused Five-Membered Aromatic Heterocycles Built on the α-Pyrone Moiety. Part 1: Five-Membered Aromatic Rings with One Heteroatom. Molecules 2021; 26:483. [PMID: 33477568 PMCID: PMC7831143 DOI: 10.3390/molecules26020483] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 12/27/2022] Open
Abstract
This review gives an up-to-date overview of the different ways (routes) to the synthesis of coumarin (benzopyrone)-fused, five-membered aromatic heterocycles with one heteroatom, built on the pyrone moiety. Covering 1966 to 2020.
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Affiliation(s)
- Eslam Reda El-Sawy
- National Research Centre, Chemistry of Natural Compounds Department, Dokki-Cairo 12622, Egypt;
| | | | - Gilbert Kirsch
- Laboratoire Lorrain de Chimie Moléculaire (L.2.C.M.), Université de Lorraine, 57050 Metz, France
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11
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An Q, Liu L, Tang Z, Luo H, Li Y, Xu M, Li B. Access to thiazoles via [3 + 2] cycloaddition of 1,2,3-thiadiazoles with isonitriles. Org Chem Front 2021. [DOI: 10.1039/d1qo00165e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The formal [3 + 2] cycloaddition of 1,2,3-thiadiazoles with isonitriles is developed to access structurally diverse 4,5-disubstituted thiazoles, in which the thioketene as a sulfo-2C-synthon is first disclosed.
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Affiliation(s)
- Qiaoyu An
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - Lei Liu
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - Zongyuan Tang
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - Han Luo
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - You Li
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - Mingchuan Xu
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
| | - Baosheng Li
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- P. R. China
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12
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Lv K, Bao X. Mechanistic insights into the Rh( i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles: Does the intermediacy of α-thiavinyl Rh-carbenoids play an important role? Org Chem Front 2021. [DOI: 10.1039/d0qo01246g] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Density functional theory (DFT) calculations were performed to gain an in-depth mechanistic understanding of the Rh(i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles.
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Affiliation(s)
- Kang Lv
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Xiaoguang Bao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
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13
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Dong Z, Chen C, Wang J, Xu J, Yang Z. Dual roles of bisphosphines and epoxides: Rh-catalyzed highly chemoselective and diastereoselective (3 + 2) transannulations of 1,2,3-thiadiazoles with cyanoepoxides. Org Chem Front 2021. [DOI: 10.1039/d1qo01220g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Dual roles of bisphosphines and epoxides are demonstrated in highly chemoselective and diastereoselective (3 + 2) transannulations.
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Affiliation(s)
- Ziyang Dong
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Cunzhi Chen
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jing Wang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jiaxi Xu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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14
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Recent strategies in the synthesis of thiophene derivatives: highlights from the 2012-2020 literature. Mol Divers 2020; 25:2571-2604. [PMID: 32734589 DOI: 10.1007/s11030-020-10128-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/21/2020] [Indexed: 10/23/2022]
Abstract
Thiophene-based analogs have been fascinated by a growing number of scientists as a potential class of biologically active compounds. Furthermore, they play a vital role for medicinal chemists to improve advanced compounds with a variety of biological effects. The current review envisioned to highlight some recent and particularly remarkable examples of the synthesis of thiophene derivatives by heterocyclization of various substrates from 2012 on.
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15
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Son J, Baek Y, Kim S, Lee K, Lee PH. Rhodium(
III
)‐Catalyzed N−H Insertion Reaction of Phosphoryl Amides with
α‐Aryl
Diazoesters for the Synthesis of
α‐Phosphoryl
Amino Esters. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jeong‐Yu Son
- Department of ChemistryKangwon National University Chuncheon 24341 Republic of Korea
| | - Yonghyeon Baek
- Department of ChemistryKangwon National University Chuncheon 24341 Republic of Korea
| | - Sanghyuck Kim
- Department of ChemistryKangwon National University Chuncheon 24341 Republic of Korea
| | - Kyungsup Lee
- Department of ChemistryKangwon National University Chuncheon 24341 Republic of Korea
| | - Phil Ho Lee
- Department of ChemistryKangwon National University Chuncheon 24341 Republic of Korea
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16
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Zhou B, Wu Q, Dong Z, Xu J, Yang Z. Rhodium-Catalyzed 1,1-Hydroacylation of Thioacyl Carbenes with Alkynyl Aldehydes and Subsequent Cyclization. Org Lett 2019; 21:3594-3599. [DOI: 10.1021/acs.orglett.9b01003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Bingnan Zhou
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Qiuyue Wu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Ziyang Dong
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Zhanhui Yang
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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17
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Progress in intermolecular and intramolecular reactions of thioamides with diazo compounds and azides. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Harper AD, Aitken RA. The Chemistry of Thieno[c]pyrrolones, Dihydrothieno[c]pyrrolones, and Their Fused Derivatives. ADVANCES IN HETEROCYCLIC CHEMISTRY 2019. [DOI: 10.1016/bs.aihch.2018.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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19
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2017. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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20
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Baek Y, Maeng C, Kim H, Lee PH. Regioselective Synthesis of Indolopyrazines through a Sequential Rhodium-Catalyzed Formal [3+3] Cycloaddition and Aromatization Reaction of Diazoindolinimines with Azirines. J Org Chem 2018; 83:2349-2360. [DOI: 10.1021/acs.joc.8b00115] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yonghyeon Baek
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chanyoung Maeng
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyunseok Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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21
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Zhao L, Liao WW. Pd-Catalyzed intramolecular C–H addition to the cyano-group: construction of functionalized 2,3-fused thiophene scaffolds. Org Chem Front 2018. [DOI: 10.1039/c7qo01000a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An efficient synthesis of 2,3-fused thiophenes was demonstrated through a Pd-catalyzed intramolecular C–H addition of thiophenes bearing cyanohydrin components to nitriles.
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Affiliation(s)
- Lang Zhao
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Wei-Wei Liao
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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22
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Seo B, Kim H, Kim YG, Baek Y, Um K, Lee PH. Synthesis of Bicyclic Isothiazoles through an Intramolecular Rhodium-Catalyzed Transannulation of Cyanothiadiazoles. J Org Chem 2017; 82:10574-10582. [PMID: 28889744 DOI: 10.1021/acs.joc.7b02077] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An intramolecular rhodium-catalyzed transannulation of readily available cyanothiadiazoles containing an ester, amide, or ether as a linker is described. It provides a wide range of bicyclic isothiazoles in good to excellent yields together with the release of molecular nitrogen. These results indicate that the carbon atom in the α-thiavinyl carbene is nucleophilic and that the sulfur atom is electrophilic.
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Affiliation(s)
- Boram Seo
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Hyunseok Kim
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Ya Gob Kim
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Yonghyeon Baek
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Kyusik Um
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
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23
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Park S, Kim H, Son JY, Um K, Lee S, Baek Y, Seo B, Lee PH. Synthesis of Imidazopyridines via Copper-Catalyzed, Formal Aza-[3 + 2] Cycloaddition Reaction of Pyridine Derivatives with α-Diazo Oxime Ethers. J Org Chem 2017; 82:10209-10218. [PMID: 28869378 DOI: 10.1021/acs.joc.7b01714] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The Cu-catalyzed, formal aza-[3 + 2] cycloaddition reaction of pyridine derivatives with α-diazo oxime ethers in trifluoroethanol was used to synthesize imidazopyridines via the release of molecular nitrogen and elimination of alcohol. These methods enabled modular synthesis of a wide range of N-heterobicyclic compounds such as imidazopyridazines, imidazopyrimidines, and imidazopyrazines with an α-imino Cu-carbenoid generated from the α-diazo oxime ethers and copper.
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Affiliation(s)
- Sangjune Park
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Hyunseok Kim
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Jeong-Yu Son
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Kyusik Um
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Sooho Lee
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Yonghyeon Baek
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Boram Seo
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
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