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Sharma A, Vaid H, Kotwal R, Mughal ZN, Gurubrahamam R. Rhodium(II)-Catalyzed Alkynyl Carbene Insertion into N-H Bonds. Org Lett 2024; 26:4887-4892. [PMID: 38842489 DOI: 10.1021/acs.orglett.4c01345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
The first insertion of an alkynyl carbene into N-H bonds under Rh-catalysis is developed. Alkynyl hydrazone carboxylates are used as donor-acceptor carbene precursors and are exquisitely inserted into the N-H bonds of various amines, amides, and 1,2-diamines. A wide variety of 3-alkynyl 3,4-dihydroquinoxalin-2(1H)-ones and densely functionalized α-alkynyl α-amino esters are obtained in good to excellent yields. Further, chemoselective N-H insertion reactions, mechanistic studies, and various synthetic transformations for obtaining valuable heterocycles are demonstrated.
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Affiliation(s)
- Akashdeep Sharma
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Himani Vaid
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Riya Kotwal
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Zuhaib N Mughal
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Ramani Gurubrahamam
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
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2
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Zhou X, Jiang J, Zhang M, Wu Q, Zhu K, Shi D, Hou S, Zhao J, Li P. Dioxane promoted photochemical O-alkylation of 1,3-dicarbonyl compounds beyond carbene insertion into C-H and C-C bonds. Chem Commun (Camb) 2024; 60:4330-4333. [PMID: 38545739 DOI: 10.1039/d4cc00778f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
A photochemical synthesis of enol ethers and furan-3(2H)-ones from 1,3-dicarbonyl compounds and aryl diazoacetates has been developed. Significantly, 1,4-dioxane promoted O-alkylation of various 1,3-dicarbonyl compounds beyond previous carbene insertion into C-H and C-C bonds has been disclosed.
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Affiliation(s)
- Xinlong Zhou
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Jingjing Jiang
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Min Zhang
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Qingqing Wu
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Keyong Zhu
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Dongjie Shi
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Sensen Hou
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Jingjing Zhao
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
| | - Pan Li
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China.
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3
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Vaid H, Sharma A, Jamwal P, Sharma P, Gurubrahamam R. Doyle-Kirmse Reaction on Alkynyl Hydrazone Carboxylates: Synthesis of 1,4-Allenyne and 1,5-Enyne Thioaryl Carboxylates. Org Lett 2024; 26:2135-2140. [PMID: 38426872 DOI: 10.1021/acs.orglett.4c00545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
The first Doyle-Kirmse reaction on alkynyl diazoacetates using allyl/propargyl sulfides is reported. The development provides diversified 1,5-enyne and 1,4-allenyne thioaryl carboxylates in good yields under ligand-/additive-free AuCl and Rh2(OAc)4 catalysis, respectively (48 examples, up to 96% yield). The study demonstrated the dual role of allyl sulfide as a ligand and substrate. Also, we have exemplified various synthetic modifications of the products to showcase the utility of different functional groups.
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Affiliation(s)
- Himani Vaid
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Akashdeep Sharma
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Paru Jamwal
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Pryanka Sharma
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Ramani Gurubrahamam
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
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4
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Sharma A, Jamwal P, Vaid H, Gurubrahamam R. Synthesis of Alkynyl Hydrazones from Unprotected Hydrazine and Their Reactivity as Diazo Precursors. Org Lett 2023; 25:1889-1894. [PMID: 36897650 DOI: 10.1021/acs.orglett.3c00404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Alkynyl hydrazones are synthesized conveniently from 2-oxo-3-butynoates and hydrazine by suppressing the susceptible formation of pyrazoles. The resultant hydrazones are transformed into alkynyl diazoacetates under metal-free and mild oxidative conditions in excellent yields. Further, the alkynyl cyclopropane and propargyl silane carboxylates are synthesized in good yields by developing an unprecedented copper-catalyzed alkynyl carbene transfer reaction.
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Affiliation(s)
- Akashdeep Sharma
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Paru Jamwal
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Himani Vaid
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
| | - Ramani Gurubrahamam
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, PO Nagrota, Jagti, Jammu and Kashmir 181221, India
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5
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Zhang X, Li L, Sivaguru P, Zanoni G, Bi X. Highly electrophilic silver carbenes. Chem Commun (Camb) 2022; 58:13699-13715. [PMID: 36453127 DOI: 10.1039/d2cc04845k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Catalytic carbene transfer reactions are fundamental transformations in modern organic synthesis, which enable direct access to diverse structurally complex molecules. Despite diazo precursors playing a crucial role in catalytic carbene transfer reactions, most reported methodologies take into account only diazoacetates or related compounds. This is primarily because diazoalkanes, unless they contain a resonance stabilizing group, are more susceptible to violent exothermic decomposition. In this feature article, we present an alternative approach to carbene-transfer reactions based on the formation of highly electrophilic silver carbenes from N-sulfonylhydrazones, where the high electrophilicity of silver carbenes stems from the weak interaction between silver and the carbenic carbon. These precursors are readily accessible, stable, and environmentally sustainable. Using the strategy that employs highly electrophilic silver carbenes, it is possible to develop novel intermolecular transformations involving non-stabilized carbenes, including C(sp3)-H insertion, C(sp3)-C(O) insertion, cycloaddition, and defluorinative functionalization. The silver-catalyzed carbene transfer reactions described here have high efficiency, unusual reactivity, exceptional selectivity, and a reaction pathway that differs from typical transition metal-catalyzed reactions. Our research provided fundamental insight into silver carbene chemistry, and we hope to apply this mode of catalysis to other more general transformations, including asymmetric transformations.
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Affiliation(s)
- Xiaolong Zhang
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, 130024, Changchun, P. R. China.
| | - Linxuan Li
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, 130024, Changchun, P. R. China.
| | - Paramasivam Sivaguru
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, 130024, Changchun, P. R. China.
| | - Giuseppe Zanoni
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Xihe Bi
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, 130024, Changchun, P. R. China.
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6
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Wu Y, Ning Y, Han X, Liao P, Xia Y, Sivaguru P, Bi X. Silver-Catalyzed Vinylcarbene Insertion into C–C Bonds of 1,3-Diketones with Vinyl- N-triftosylhydrazones. Org Lett 2022; 24:8136-8141. [DOI: 10.1021/acs.orglett.2c03176] [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]
Affiliation(s)
- Yong Wu
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Xinyue Han
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Peiqiu Liao
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Ying Xia
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Paramasivam Sivaguru
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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7
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Wang DK, Li LB, Liu FL, Qiu H, Li JZ, Zhang J, Deng C, Wei WT. Fe-Catalyzed Selective Formal Insertion of Diazo Compounds into C(sp)-C(sp 3) Bonds of Propargyl Alcohols: Access to Alkyne-Substituted All-Carbon Quaternary Centers. ACS CENTRAL SCIENCE 2022; 8:1028-1034. [PMID: 35912339 PMCID: PMC9336152 DOI: 10.1021/acscentsci.2c00204] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Indexed: 06/15/2023]
Abstract
The construction of all-carbon quaternary centers, especially those containing an alkyne-substituted framework, represents an important challenge in organic synthesis. Here we present a novel Fe-catalyzed selective formal insertion of diazo compounds into C(sp)-C(sp3) bonds of propargyl alcohols under mild conditions that enables the streamlined construction of alkyne-substituted all-carbon quaternary centers. This unique strategy starts with in situ generation of an ester group in the presence of carboxylic acids, followed by insertion of metal-carbene into C(sp)-C(sp3) bonds, which may open up a new reaction mode for exploring metal-carbene insertion into acyclic C-C bonds.
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Affiliation(s)
- Dong-Kai Wang
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Liu-Bin Li
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Fa-Liang Liu
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Hui Qiu
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Jiao-Zhe Li
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Jianfeng Zhang
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Chao Deng
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P. R. China
| | - Wen-Ting Wei
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
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8
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Gao GQ, Ma G, Jiang XL, Liu Q, Fan CL, Lv DC, Su H, Ru GX, Shen WB. Gold-catalyzed cycloadditions of allenes via metal carbenes. Org Biomol Chem 2022; 20:5035-5044. [PMID: 35661854 DOI: 10.1039/d2ob00626j] [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
In recent years, gold-catalyzed cycloadditions of allenes, especially those involving a gold carbene intermediate, have received significant interest, as they avoid the utilization of potentially hazardous and inaccessible diazo compounds as starting materials for carbene generation. Cycloaddition reactions consisting of the uncomplicated addition of two or more unsaturated functional groups are one of the most efficient synthetic methodologies for the rapid assembly of carbo- and heterocyclic structures from simple acyclic precursors. In this review, we introduce an overview of the advances in the gold-catalyzed cycloaddition of allenes via a metal carbene intermediate and categorize these reactions according to the reaction types of the cycloadditions.
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Affiliation(s)
- Guang-Qin Gao
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Guang Ma
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Xiao-Lei Jiang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China. .,Sanmenxia Polytechnic, Sanmenxia, Henan 472000, China
| | - Qing Liu
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Cai-Ling Fan
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Dong-Can Lv
- 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.
| | - Guang-Xin Ru
- 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.
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Ning Y, Huo M, Wu L, Bi X. Silver-catalyzed cyclopropanation of alkenes with alkynyl N-nosylhydrazones leading to alkynyl cyclopropanes. Chem Commun (Camb) 2022; 58:3485-3488. [PMID: 35191450 DOI: 10.1039/d2cc00099g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Here, a novel method for the stereoselective synthesis of alkynyl cyclopropanes, by the silver-catalyzed alkynylcyclopropanation of alkenes using alkynyl N-nosylhydrazones as alkynyl carbene precursors, is reported. This method provides a straightforward and powerful approach for preparing various alkynyl cyclopropanes in high yield with excellent stereoselectivities. In addition, the practicality of this method was demonstrated by gram-scale synthesis and late-stage modification of bioactive molecules.
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Affiliation(s)
- Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China.
| | - Mengtian Huo
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China.
| | - Lizuo Wu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China.
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China. .,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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