1
|
Ma G, Wei KF, Song M, Dang YL, Yue Y, Han B, Su H, Shen WB. Recent advances in transition-metal-catalyzed Büchner reaction of alkynes. Org Biomol Chem 2023. [PMID: 37325882 DOI: 10.1039/d3ob00654a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Medium-sized ring-containing organic molecules, especially seven-membered rings, are significant structural motifs. However, such frameworks are considered difficult structures to access owing to entropic effects and transannular interactions. Compared to the construction of five and six-membered rings, the synthesis of seven-membered rings can be more challenging through traditional cyclization pathways. Büchner reactions are particularly attractive and efficient synthetic strategies to construct functionalized seven-membered ring products from the benzenoid double bond with carbene. In recent years, the field of transition-metal-catalyzed Büchner ring expansion reactions of alkynes has experienced a speedy development and a diverse array of efficient synthetic procedures have been disclosed under mild experimental conditions, as the synthesis of synthetically challenging seven-membered rings is easily achieved. In this review, we will focus on the recent progress in the transition-metal-catalyzed Büchner reaction of alkynes and the mechanistic rationale is depicted where possible, with the reactions being sorted according to the type of catalyst.
Collapse
Affiliation(s)
- Guang Ma
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Kua-Fei Wei
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Man Song
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Yu-Li Dang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Yang Yue
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Bing Han
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Hui Su
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Wen-Bo Shen
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| |
Collapse
|
2
|
Yuan DF, Wang ZC, Geng RS, Ren GY, Wright JS, Ni SF, Li M, Wen LR, Zhang LB. Hypervalent iodine promoted the synthesis of cycloheptatrienes and cyclopropanes. Chem Sci 2022; 13:478-485. [PMID: 35126980 PMCID: PMC8729816 DOI: 10.1039/d1sc05429e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 11/28/2021] [Indexed: 11/21/2022] Open
Abstract
A new strategy is reported for intramolecular Buchner-type reactions using PIDA as a promotor. Traditionally, the Buchner reaction is achieved via Rh-carbenoids derived from RhII catalysts with diazo compounds. Herein, the first metal-free Buchner-type reaction to construct highly strained cycloheptatriene- and cyclopropane-fused lactams is presented. The advantage of these transformations is in their mild reaction conditions, simple operation, broad functional group compatibility and rapid synthetic protocol. In addition, scaled-up experiments and a series of follow-up synthetic procedures were performed to clarify the flexibility and practicability of this method. DFT calculations were carried out to clarify the mechanism. A new strategy is reported for intramolecular Buchner-type reactions using PIDA as a promotor.![]()
Collapse
Affiliation(s)
- Da-Fu Yuan
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| | - Zi-Chen Wang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| | - Rui-Sen Geng
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| | - Guang-Yi Ren
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| | - James S Wright
- Department of Chemistry, University of Surrey Guildford GU2 7XH Surrey UK
| | - Shao-Fei Ni
- Department of Chemistry, Shantou University Shantou Guangdong 515063 P. R. China
| | - Ming Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| | - Li-Rong Wen
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| | - Lin-Bao Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 P. R. China
| |
Collapse
|
3
|
Teng MY, Han T, Huang EH, Ye LW. Research Progress on Enantioselective Desymmetrization Reactions Involving Metal Carbenes. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202206041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
4
|
Zhu D, Cao T, Chen K, Zhu S. Rh2(II)-Catalyzed Enantioselective Intramolecular Büchner Reaction and Aromatic Substitution of Donor-Donor Carbenes. Chem Sci 2022; 13:1992-2000. [PMID: 35308865 PMCID: PMC8848862 DOI: 10.1039/d1sc05374d] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 01/19/2022] [Indexed: 11/21/2022] Open
Abstract
The chiral dirhodium(ii) tetracarboxylate-catalyzed enantioselective intramolecular Büchner reaction of donor/donor-carbenes was reported and a series of valuable chiral polycyclic products were synthesized. Both aryloxy enynones and diazo compounds were efficient carbene precursors for this reaction. Excellent yields (up to 99%) and outstanding enantioselectivities (up to >99% ee) were achieved under standard conditions. For furyl substituted chiral cyclohepta[b]benzofurans bearing a substituent at the C4 position on cycloheptatrienes, control reactions showed that the chiral Büchner products could slowly racemize either under dark or natural light conditions. A diradical-involved mechanism rather than a zwitterionic intermediate was proposed to explain the racemization. Furthermore, furyl substituted chiral fluorene derivatives were obtained via asymmetric aromatic substitution when biaryl enynones were employed as carbene precursors. The chiral dirhodium(ii) tetracarboxylate-catalyzed enantioselective intramolecular Büchner reaction and aromatic substitution of donor/donor-carbenes were reported and a series of valuable chiral polycyclic products were synthesized.![]()
Collapse
Affiliation(s)
- Dong Zhu
- 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
| | - Tongxiang Cao
- 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
| | - Kai Chen
- College of Chemistry and Chemical Engineering, Central South University Changsha 410083 P. R. China
| | - Shifa Zhu
- 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
- Guangdong Youmei Institute of Intelligent Bio-manufacturing Foshan 528225 P. R. China
| |
Collapse
|
5
|
Otog N, Gantogos B, Fujisawa I, Iwasa S. Highly enantioselective synthesis of norcaradiene derivatives from naphthyl diazoacetamides using a Ru( ii)-Pheox complex. Chem Commun (Camb) 2022; 58:12325-12328. [DOI: 10.1039/d2cc04355f] [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
The highly regio- and enantioselective intramolecular cyclopropanation reactions of naphthyl diazoacetamides have been reported herein.
Collapse
Affiliation(s)
- Nansalmaa Otog
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Bilguun Gantogos
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Ikuhide Fujisawa
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Seiji Iwasa
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| |
Collapse
|
6
|
Huang MY, Zhu SF. Uncommon carbene insertion reactions. Chem Sci 2021; 12:15790-15801. [PMID: 35024104 PMCID: PMC8672736 DOI: 10.1039/d1sc03328j] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 10/29/2021] [Indexed: 02/06/2023] Open
Abstract
Transition-metal-catalysed carbene insertion reaction is a straightforward and efficient protocol for the construction of carbon–carbon or carbon–heteroatom bonds. Compared to the intensively studied and well-established “common” carbene insertion reactions, including carbene insertion into C–H, Si–H, N–H, O–H, and S–H bonds, several “uncommon” carbene insertion reactions, including carbene insertion into B–H, Sn–H, Ge–H, P–H, F–H, C–C, and M–M bonds, have been neglected for a long time. However, more and more studies on uncommon carbene insertion reactions have been disclosed recently, and clearly demonstrate the great synthetic potential of these reactions. The current perspective reviews the history and the newest advances of uncommon carbene insertion reactions, discusses their potential applications and challenges, and also presents an outlook of this promising field. Transition-metal-catalysed carbene insertion reaction is a straightforward and efficient protocol for the construction of carbon–carbon or carbon–heteroatom bonds.![]()
Collapse
Affiliation(s)
- Ming-Yao Huang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Shou-Fei Zhu
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| |
Collapse
|
7
|
Buckley AM, Crowley DC, Brouder TA, Ford A, Rao Khandavilli UB, Lawrence SE, Maguire AR. Dirhodium Carboxylate Catalysts from 2-Fenchyloxy or 2-Menthyloxy Arylacetic Acids: Enantioselective C-H Insertion, Aromatic Addition and Oxonium Ylide Formation/Rearrangement. ChemCatChem 2021; 13:4318-4324. [PMID: 34820025 PMCID: PMC8597163 DOI: 10.1002/cctc.202100924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/05/2021] [Indexed: 11/27/2022]
Abstract
A new class of dirhodium carboxylate catalysts have been designed and synthesized from 2-fenchyloxy or 2-menthyloxy arylacetic acids which display excellent enantioselectivity across a range of transformations of α-diazocarbonyl compounds. The catalysts were successfully applied to enantioselective C-H insertion reactions of aryldiazoacetates and α-diazo-β-oxosulfones affording the respective products in up to 93 % ee with excellent trans diastereoselectivity in most cases. Furthermore, efficient desymmetrization in an intramolecular C-H insertion was achieved. In addition, these catalysts prove highly enantioselective for intramolecular aromatic addition with up to 88 % ee, and oxonium ylide formation and rearrangement with up to 74 % ee.
Collapse
Affiliation(s)
- Aoife M. Buckley
- School of ChemistryAnalytical and Biological Chemistry Research FacilityUniversity College CorkCorkIreland
| | - Daniel C. Crowley
- School of ChemistryAnalytical and Biological Chemistry Research FacilityUniversity College CorkCorkIreland
| | - Thomas A. Brouder
- School of ChemistryAnalytical and Biological Chemistry Research FacilityUniversity College CorkCorkIreland
| | - Alan Ford
- School of ChemistryAnalytical and Biological Chemistry Research FacilityUniversity College CorkCorkIreland
| | - U. B. Rao Khandavilli
- School of ChemistryAnalytical and Biological Chemistry Research FacilityUniversity College CorkCorkIreland
| | - Simon E. Lawrence
- School of ChemistryAnalytical and Biological Chemistry Research FacilityUniversity College CorkCorkIreland
| | - Anita R. Maguire
- School of Chemistry and School of PharmacyAnalytical and Biological Chemistry Research FacilitySynthesis and Solid State Pharmaceutical CentreUniversity College CorkCorkIreland
| |
Collapse
|
8
|
Russo TVC, Sá MM. One‐Pot Synthesis of α‐Diazo‐γ,δ‐unsaturated Esters as Versatile Building Blocks for Functionalized Dienes, Cyclopentenes, and 5,7‐Fused Bicycles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100797] [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]
Affiliation(s)
- Theo V. C. Russo
- Departamento de Química Universidade Federal de Santa Catarina Florianópolis SC 88040-900 Brazil
| | - Marcus M. Sá
- Departamento de Química Universidade Federal de Santa Catarina Florianópolis SC 88040-900 Brazil
| |
Collapse
|
9
|
Singh P, Kumar Chouhan K, Mukherjee A. Ruthenium Catalyzed Intramolecular C-X (X=C, N, O, S) Bond Formation via C-H Functionalization: An Overview. Chem Asian J 2021; 16:2392-2412. [PMID: 34251077 DOI: 10.1002/asia.202100513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/09/2021] [Indexed: 01/12/2023]
Abstract
Ruthenium catalyzed C-H activation is well known for its high tolerance towards the functional group and broad applicability in organic synthesis and molecular sciences, with significant applications in pharmaceutical industries, material sciences, and polymer industry. In the last few decades, enormous progress has been observed with ruthenium-catalyzed C-H activation chemistry. Notably, the vast majority of the C-H functionalization known in the literature are intermolecular, although the intramolecular variant provides fascinating new structural facet starting from the simple molecular scaffolds. Intramolecular C-H functionalization is atom economical and step efficient, results in less formation of undesired products which is easy to purify. This has created a lot of interest in organic chemistry in developing new synthetic strategies for such functionalization. The focus of this review is to present the relatively unexplored intramolecular functionalization of C-H bonds into C-X (X=C, N, O, S) bonds utilizing versatile ruthenium catalysts, their scope, and brief mechanistic discussion.
Collapse
Affiliation(s)
- Pallavi Singh
- Department of Chemistry, Indian Institute of Technology Bhilai GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India
| | - Kishor Kumar Chouhan
- Department of Chemistry, Indian Institute of Technology Bhilai GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India
| | - Arup Mukherjee
- Department of Chemistry, Indian Institute of Technology Bhilai GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India
| |
Collapse
|
10
|
Zhao S, Chen XX, Gao N, Qian M, Chen X. Visible-Light-Mediated Cyclopropanation Reactions of 3-Diazooxindoles with Arenes. J Org Chem 2021; 86:7131-7140. [PMID: 33871258 DOI: 10.1021/acs.joc.1c00418] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The cyclopropanation reaction of 3-diazooxindoles with arenes was first accomplished using visible-light irradiation. A series of spiro[norcaradiene-7,3'-indolin]-2'-ones were synthesized for the first time in high yields and with excellent diastereoselectivities. The synthetic usefulness of this catalyst-free photochemical methodology is illustrated by the further controllable rearrangement and epoxidation reactions.
Collapse
Affiliation(s)
- Shuai Zhao
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xiang-Xiang Chen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Nan Gao
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Mingcheng Qian
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xin Chen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| |
Collapse
|
11
|
Ito T, Harada S, Homma H, Takenaka H, Hirose S, Nemoto T. Asymmetric Intramolecular Dearomatization of Nonactivated Arenes with Ynamides for Rapid Assembly of Fused Ring System under Silver Catalysis. J Am Chem Soc 2021; 143:604-611. [PMID: 33382259 DOI: 10.1021/jacs.0c10682] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Arene dearomatization is a straightforward method for converting an aromatic feedstock into functionalized carbocycles. Enantioselective dearomatizations of chemically inert arenes, however, are quite limited and underexplored relative to those of phenols and indoles. We developed a method for diazo-free generation of silver-carbene species from an ynamide and applied it to the dearomatization of nonactivated arenes. Transiently generated norcaradiene could be trapped by intermolecular [4 + 2] cycloaddition, synthesizing polycycles with five consecutive stereogenic centers. This protocol constitutes the first highly enantioselective reaction based on the diazo-free generation of silver-carbene species. Mechanistic investigations revealed a dearomatization followed by two different classes of pericyclic reactions, as well as the origin of the chemo- and enantioselectivity.
Collapse
Affiliation(s)
- Tsubasa Ito
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Haruka Homma
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiroki Takenaka
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shumpei Hirose
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan.,Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| |
Collapse
|
12
|
Darses B, Maldivi P, Philouze C, Dauban P, Poisson JF. Asymmetric Intramolecular Buchner Reaction: From High Stereoselectivity to Coexistence of Norcaradiene, Cycloheptatriene, and an Intermediate Form in the Solid State. Org Lett 2021; 23:300-304. [PMID: 33393310 DOI: 10.1021/acs.orglett.0c03774] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bicyclic compounds bearing a quaternary stereogenic center have been obtained using asymmetric intramolecular Buchner reaction with excellent yields and level of enantioselectivity. X-ray crystallography determination of the absolute configuration of one product has led to the serendipitous observation of an unusual behavior within the crystal structure, with equilibrating norcaradiene and cycloheptatriene valence isomers at the solid state, as well as an even more unexpected intermediate form. DFT calculations were performed to support these observations.
Collapse
Affiliation(s)
- Benjamin Darses
- Univ. Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France.,Institut de Chimie des Substances Naturelles, CNRS UPR-2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Pascale Maldivi
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, 38000 Grenoble, France
| | | | - Philippe Dauban
- Institut de Chimie des Substances Naturelles, CNRS UPR-2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | | |
Collapse
|
13
|
Zhu JL, Tsai YT. Rhodium-Catalyzed Aerobic Decomposition of 1,3-Diaryl-2-diazo-1,3-diketones: Mechanistic Investigation and Application to the Synthesis of Benzils. J Org Chem 2021; 86:813-828. [PMID: 33395740 DOI: 10.1021/acs.joc.0c02366] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The conversion of 1,3-diaryl-2-diazo-1,3-diketones to 1,2-daryl-1,2-diketones (benzils) is reported based on a rhodium(II)-catalyzed aerobic decomposition process. The reaction occurs at ambient temperatures and can be catalyzed by a few dirhodium carboxylates (5 mol %) under a balloon pressure of oxygen. Moreover, an oxygen atom from the O2 reagent is shown to be incorporated into the product, and this is accompanied by the extrusion of a carbonyl unit from the starting materials. Mechanistically, it is proposed that the decomposition may proceed via the interaction of a ketene intermediate resulting from a Wolff rearrangement of the carbenoid, with a rhodium peroxide or peroxy radical species generated upon the activation of molecular oxygen. The proposed mechanism has been supported by the results from a set of controlled experiments. By using this newly developed strategy, a large array of benzil derivatives as well as 9,10-phenanthrenequinone were synthesized from the corresponding diazo substrates in varying yields. On the other hand, the method did not allow the generation of benzocyclobutene-1,2-dione from 2-diazo-1,3-indandione because of the difficulty of inducing the initial rearrangement.
Collapse
Affiliation(s)
- Jia-Liang Zhu
- Department of Chemistry, National Dong Hwa University, No. 1, Sec. 2, Da Hsueh Rd., Shoufeng, Hualien 97401, Taiwan, ROC
| | - Yi-Ting Tsai
- Department of Chemistry, National Dong Hwa University, No. 1, Sec. 2, Da Hsueh Rd., Shoufeng, Hualien 97401, Taiwan, ROC
| |
Collapse
|
14
|
Phan Thi Thanh N, Dang Thi Thu H, Tone M, Inoue H, Iwasa S. Synthesis of Oxindole Derivatives via Intramolecular C–H Insertion of Diazoamides Using Ru(II)-Pheox Catalyst. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
Synthesis of γ-lactams via Ru(II)–Pheox-catalyzed regioselective intramolecular Csp3–H insertion of diazoacetamides. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
16
|
Smith KL, Padgett CL, Mackay WD, Johnson JS. Catalytic, Asymmetric Dearomative Synthesis of Complex Cyclohexanes via a Highly Regio- and Stereoselective Arene Cyclopropanation Using α-Cyanodiazoacetates. J Am Chem Soc 2020; 142:6449-6455. [PMID: 32227868 DOI: 10.1021/jacs.9b13080] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Arene cyclopropanation offers a direct route to higher-order, non-aromatic carbocycles; however, the inherent issue of dictating site selectivity has cumbered the development of novel intermolecular reactions that directly engage the arene pool. This paper describes a highly regio- and stereoselective, Rh2[(S)-PTTL]4-catalyzed arene cyclopropanation using α-cyanodiazoacetates to afford stable norcaradienes bearing three stereogenic centers, one of which is an all-carbon quaternary center. The enantioenriched norcaradienes served as tunable templates for further transformation into stereochemically dense, fused and bicyclic carbocycles containing transmutable functionality.
Collapse
Affiliation(s)
- Kendrick L Smith
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Cody L Padgett
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - William D Mackay
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| |
Collapse
|