1
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Zhang P, Liu H, Xu S, He Y, He X, Sun B, Hu J. Direct Construction of 1,4-Dihydropyridazines and Parazoles via Annulation of Alkyl 2-Aroyl-1-chlorocyclopropanecarboxylates. J Org Chem 2024. [PMID: 38822472 DOI: 10.1021/acs.joc.4c00520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
An efficient and chemodivergent synthesis of highly functionalized 1,4-dihydropyridazines and parazoles has been accomplished via base-promoted annulation between hydrazones and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates, respectively. This transition-metal-free domino reaction proceeded rapidly under mild basic conditions, affording potentially bioactive 1,4-dihydropyridazine and parazole derivatives in moderate yields. The conversion of 1,4-dihydropyridazine to pyrazole was confirmed by adjusting the quantity of the base.
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Affiliation(s)
- Pengwei Zhang
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Huili Liu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Shuo Xu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Yiqun He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Xinhao He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Bing Sun
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Junhao Hu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
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2
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Prakash M, Samanta S. Base-promoted cyclization of ortho-hydroxyacetophenones with in situ generated cyclopropenes: diastereoselective access to spirobenzo[ b]oxepines and related precursors. Org Biomol Chem 2023; 21:2001-2014. [PMID: 36789745 DOI: 10.1039/d3ob00077j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An unprecedented [5 + 2] spirocyclization route to obtain a vital class of functionalized spirobenzo[b]oxepine-cyclopropanes in good to high yields with excellent diastereoselectivities is reported. This domino reaction proceeds through a regioselective oxa-Michael addition of ortho-hydroxyacetophenones as 1,5-binucleophiles to in situ produced highly reactive cyclopropenes from 2-aroyl-1-chlorocyclopropanecarboxylates triggered by Cs2CO3 and the subsequent intramolecular aldol reaction under heating conditions, enabling the formation of new C-O and C-C bonds for benzo[b]oxepine ring synthesis. Moreover, at ambient temperature, the above C-O/C-C bond-forming event takes place preferentially via a [4 + 2] annulation path over a spirocyclization route, leading to substituted fused-cyclopropanes with good diastereoselectivities. Gratifyingly, further alterations of the obtained spirobenzo[b]oxepines and tetrahydrocyclopropa[b]chromenes afford fascinating classes of 4H-chromen-4-ones and cyclopenta[c]chromenes, respectively, under metal-free conditions.
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Affiliation(s)
- Meher Prakash
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
| | - Sampak Samanta
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
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3
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Prakash M, Rani P, Samanta S. A substrate-dependent reaction of 1-aryl-2-alkyl-1,2-diketones with 2-aroyl-1-chlorocyclopropanecarboxylates: selective access to 2',5'-dicyclopropoxy-1,1':4',1''-teraryls and pentafulvenes. Org Biomol Chem 2022; 20:6445-6458. [PMID: 35894220 DOI: 10.1039/d2ob00971d] [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 interesting substrate-controlled one-pot approach to highly substituted 2',5'-dicyclopropoxy-1,1':4',1''-teraryls and 6-hydroxypentafulvenes involving various 1,2-diketones and 2-aroyl-1-chlorocyclopropanecarboxylates as 3C Michael acceptors triggered by Cs2CO3 has been developed. We noticed that 1,2-diketones play a decisive role in this reaction to determine the product's selectivity. For example, aryl rings having electron-poor functionalities at the para and meta-positions of 1,2-diketones led to 2,5-diarylhydroquinones selectively via a cyclodimerization/double oxa-Michael process with highly strained cyclopropenes. However, when 1-naphthyl/electron-donating aryl/ortho-aryl-substituted 1,2-diketones were chosen, the Michael-initiated ring expansion reaction (C-C and CC bonds) took place under the same conditions that gave the corresponding pentafulvenes predominately. Moreover, this reaction has several imperative features such as good to high diastereoselectivities, wide substrate scope, good functional group tolerance, transition metal-free process, etc.
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Affiliation(s)
- Meher Prakash
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
| | - Poonam Rani
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
| | - Sampak Samanta
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
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4
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Abstract
Heterocyclic rings are the fundamental building blocks of biological systems and have wide applications in synthetic chemistry and medicinal science. The development of novel synthetic methodology for heterocyclic skeletons from a variety of starting materials has made great progress in the past decades. Meanwhile, highly strained cyclopropenes as reactive reagents in organic transformations have drawn much attention from chemists. The rich chemical reactivity and reaction routes have been well investigated, and some review articles related to the reactivity of cyclopropenes and the construction of carbocycles and acyclic compounds have appeared in these years. Thus, this review mainly focuses on the progress in the construction of heterocyclic rings starting from various cyclopropenes including the reactions of commonly available stable cyclopropenes, in situ generated reactive cyclopropenes and cyclopropene precursors during this decade. Firstly, the transformations of common cyclopropenes into donor-type vinyl metal carbenes via transition metal induced ring opening, direct metalation of the CC bond of metal complexes, and cycloaddition reactions with 1,3-dipoles are described. Next, the annulation reactions of reactive cyclopropenes generated in situ with donor-acceptor reagents, intramolecular nucleophilic addition, and the cycloaddition reactions with 1,3-dipoles are introduced. Then, the transformation of cyclopropene precursors such as alkyl 1-chloro- or 1-alkoxy-2-aroylcyclopropanecarboxylates into five-membered heteroaromatic compounds is also mentioned. In addition, a brief outlook of the opportunity and challenges in the field of bio-orthogonal reactions related to cyclopropenes is given.
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Affiliation(s)
- Hengrui Huo
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China. .,Hebei Key Laboratory of Heterocyclic Compounds, College of Chemical Engineering and Materials, Handan University, 530 North College Road, Handan 056005, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China.
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5
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Lodhi R, Prakash M, Samanta S. Diastereoselective desymmetrization reactions of prochiral para-quinamines with cyclopropenes generated in situ: access to fused hydroindol-5-one scaffolds. Org Biomol Chem 2021; 19:7129-7133. [PMID: 34369544 DOI: 10.1039/d1ob01322j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Interesting desymmetric [3 + 2] annulation reactions between p-quinamines as prochiral N-donors and 2-aroyl-1-chlorocyclopropanecarboxylates facilitated by a base are reported. This successive double Michael reaction delivered a unique class of cyclopropane-fused hydoindol-5-one frameworks, each having four contiguous stereogenic centers, with three of them being fully substituted. Moreover, this method was found to provide acceptable chemical yields with promising diastereoselectivities (dr of up to ≤95 : 5) and to work with a variety of substrates. Importantly, a polycyclic tacrine analogue used to treat Alzheimer's disease was synthesized using our developed method.
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Affiliation(s)
- Rajni Lodhi
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
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6
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Huang L, Luo C, Xu P, Liu B, Zhang D, Zhang J, Pang D, Gong Y. Synthesis of methyl 1,
5‐diaryl‐1
H
‐pyrrole‐2‐carboxylates via acid‐catalyzed ring‐opening/ring‐closure sequence. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Long Huang
- Engineer Center of New Generation Tobacco of China Tabacco Hubei Industrial Co. Ltd Wuhan People's Republic of China
| | - Chenghao Luo
- Engineer Center of New Generation Tobacco of China Tabacco Hubei Industrial Co. Ltd Wuhan People's Republic of China
| | - Panpan Xu
- School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan People's Republic of China
| | - Bing Liu
- Engineer Center of New Generation Tobacco of China Tabacco Hubei Industrial Co. Ltd Wuhan People's Republic of China
| | - Duntie Zhang
- Engineer Center of New Generation Tobacco of China Tabacco Hubei Industrial Co. Ltd Wuhan People's Republic of China
| | - Jing Zhang
- Engineer Center of New Generation Tobacco of China Tabacco Hubei Industrial Co. Ltd Wuhan People's Republic of China
| | - Denghong Pang
- Engineer Center of New Generation Tobacco of China Tabacco Hubei Industrial Co. Ltd Wuhan People's Republic of China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan People's Republic of China
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7
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A straightforward route to alkyl
5‐arylthiophene
‐2‐thiocarboxylates from alkyl
2‐aroyl
‐1‐chlorocyclopropanecarboxylates. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Abstract
:
Pyrrole derivatives are nitrogen-containing heterocyclic compounds and widely
distributed in a large number of natural and non-natural compounds. These compounds
possess a broad spectrum of biological activities such as anti-infammatory, antiviral, antitumor,
antifungal, and antibacterial activities. Besides their biological activity, pyrrole derivatives
have also been applied in various areas such as dyes, conducting polymers, organic
semiconductors.
:
Due to such a wide range of applicability, access to this class of compounds has attracted
intensive research interest. Various established synthetic methods such as Paal-Knorr,
Huisgen, and Hantzsch have been modified and improved. In addition, numerous novel
methods for pyrrole synthesis have been discovered. This review will focus on considerable
studies on the synthesis of pyrroles, which date back from 2014.
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Affiliation(s)
- Duc Dau Xuan
- Department of Chemistry, Natural Science Education Institute, Vinh University, Vinh City, Vietnam
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9
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Maslivetc VA, Frolova LV, Rogelj S, Maslivetc AA, Rubina M, Rubin M. Metal-Templated Assembly of Cyclopropane-Fused Diazepanones and Diazecanones via exo- trig Nucleophilic Cyclization of Cyclopropenes with Tethered Carbamates. J Org Chem 2018; 83:13743-13753. [PMID: 30354138 DOI: 10.1021/acs.joc.8b02062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A strain-release-driven, cation-templated nucleophilic 7- and 8- exo-trig-cyclization of tethered Boc-protected amines to cyclopropenes is described. The featured reaction proceeds in diastereo- and regioselective fashion and allows for preparation of the corresponding 2,5-diazabicyclo[5.1.0]octan-6-ones and 2,6-diazabicyclo[6.1.0]nonan-7-ones as sole products in high yields. Preliminary studies on anticancer activities of these novel cyclopropane-fused medium heterocycles were performed.
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Affiliation(s)
- Vladimir A Maslivetc
- Department of Chemistry , University of Kansas , 1567 Irving Hill Road , Lawrence , Kansas 66045 , United States
| | - Liliya V Frolova
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Snezna Rogelj
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Anna A Maslivetc
- Department of Chemistry , University of Kansas , 1567 Irving Hill Road , Lawrence , Kansas 66045 , United States
| | - Marina Rubina
- Department of Chemistry , University of Kansas , 1567 Irving Hill Road , Lawrence , Kansas 66045 , United States
| | - Michael Rubin
- Department of Chemistry , University of Kansas , 1567 Irving Hill Road , Lawrence , Kansas 66045 , United States.,Department of Chemistry , North Caucasus Federal University , 1a Pushkin Street , Stavropol 355009 , Russian Federation
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10
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Yang S, Lu D, Huo H, Luo F, Gong Y. Construction of Substituted 2-Aminophenols via Formal [3 + 3] Cycloaddition of Alkyl 2-Aroyl-1-chlorocyclopropanecarboxylate with in Situ Generated Enamines. Org Lett 2018; 20:6943-6947. [DOI: 10.1021/acs.orglett.8b03090] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sen Yang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Dengfu Lu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Hengrui Huo
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Fan Luo
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
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11
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Maslivetc VA, Turner DN, McNair KN, Frolova L, Rogelj S, Maslivetc AA, Aksenov NA, Rubina M, Rubin M. Desymmetrization of Cyclopropenes via the Potassium-Templated Diastereoselective 7- exo- trig Cycloaddition of Tethered Amino Alcohols toward Enantiopure Cyclopropane-Fused Oxazepanones with Antimycobacterial Activity. J Org Chem 2018; 83:5650-5664. [PMID: 29696970 DOI: 10.1021/acs.joc.8b00640] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A strain-release-driven, cation-templated intramolecular nucleophilic addition of tethered alkoxides to prochiral cyclopropenes is described. Employment of chiral β- and γ-amino alkoxides allowed for highly diastereoselective assembly of a small series of enantiopure cyclopropane-fused oxazepanones. It was shown that the chiral center at C-4 plays a crucial role in controlling desymmetrization of the cyclopropenyl moiety, instigated by a profound potassium-templated effect. The preliminary biological activities of the new cyclopropane-fused medium heterocycles against Gram-positive bacteria, Gram-negative bacteria, mycobacteria, cancer cells, and fungus were evaluated.
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Affiliation(s)
- Vladimir A Maslivetc
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States
| | - Danielle N Turner
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Kimberly N McNair
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Liliya Frolova
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Snezna Rogelj
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Anna A Maslivetc
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States
| | - Nicolai A Aksenov
- Department of Chemistry , North Caucasus Federal University , 1a Pushkin St. , Stavropol 355009 , Russian Federation
| | - Marina Rubina
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States
| | - Michael Rubin
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States.,Department of Chemistry , North Caucasus Federal University , 1a Pushkin St. , Stavropol 355009 , Russian Federation
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12
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Maslivetc V, Barrett C, Aksenov NA, Rubina M, Rubin M. Intramolecular nucleophilic addition of carbanions generated from N-benzylamides to cyclopropenes. Org Biomol Chem 2018; 16:285-294. [PMID: 29242861 PMCID: PMC5755969 DOI: 10.1039/c7ob02068f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An unusual reaction is described, involving a formal intramolecular nucleophilic substitution of bromocyclopropanes with nitrogen ylides generated in situ from N-benzyl carboxamides. It is shown that this reaction involves cyclopropene intermediates and allows for the facile and expeditious preparation of 3-azabicyclo[3.1.0]hexan-2-one scaffolds.
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Affiliation(s)
- Vladimir Maslivetc
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA.
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13
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Li H, Zhu Y, Lu D, Gong Y. Regioselective addition of phosphites to acyl cyclopropanes and following rearrangements: a facile access to enol phosphates. Org Biomol Chem 2018; 16:5907-5912. [DOI: 10.1039/c8ob01533c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work describes a novel method of preparing functionalized enol phosphates with acyl cyclopropanes through a regioselective cascade reaction.
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Affiliation(s)
- Haotian Li
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- China
| | - Yuequan Zhu
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- China
| | - Dengfu Lu
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
- China
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14
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Hu JH, Xu YC, Liu DD, Sun B, Yi Y, Zhang FL. Direct stereoselective construction of cyclopropane α-amino acid with contiguous quaternary centers via [4 + 2] annulation reaction. RSC Adv 2017. [DOI: 10.1039/c7ra06465a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A direct diastereoselective synthetic approach to useful cyclopropane α-amino acid was established via base-promoted [4 + 2] annulations between o-aminobenzaldehydes and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates.
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Affiliation(s)
- Jun-Hao Hu
- Department of Chemistry and Material Science
- Key Laboratory of Functional Organometallic Materials of Hunan Provincial College
- Hengyang Normal University
- Hengyang
- People's Republic of China
| | - Yun-Chao Xu
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
- People's Republic of China
| | - Dan-Dan Liu
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
- People's Republic of China
| | - Bing Sun
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
- People's Republic of China
| | - Ying Yi
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
- People's Republic of China
| | - Fang-Lin Zhang
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
- People's Republic of China
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15
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Peng X, Huang D, Wang KH, Wang Y, Wang J, Su Y, Hu Y. Synthesis of trifluoromethylated pyrazolidines by [3 + 2] cycloaddition. Org Biomol Chem 2017; 15:6214-6222. [DOI: 10.1039/c7ob01299c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[3 + 2] cycloaddition between trifluoromethylated N-acylhydrazones and nitroolefins in the presence of potassium hydroxide and Bu4NI is developed to afford potentially bioactive trifluoromethylated pyrazolidines.
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Affiliation(s)
- Xiansha Peng
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Yalin Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Juanjuan Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Yingpeng Su
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Yulai Hu
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
- State Key Laboratory of Applied Organic Chemistry
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16
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Hu J, Wang Z, Gong Y. Regio- and Stereoselective Synthesis of Valuable Tetracyclic Compounds by Intramolecular Diels-Alder Reactions between Furan and Cyclopropene Moieties. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600535] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Junhao Hu
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Road 430074 Wuhan People's Republic of China
| | - Zhenghai Wang
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Road 430074 Wuhan People's Republic of China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Road 430074 Wuhan People's Republic of China
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17
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Huang Z, Gong Y. A straightforward sequence to alkyl 1H-pyrrole-2,5-dicarboxylates starting from acylhydrazono esters and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates. RSC Adv 2016. [DOI: 10.1039/c6ra01829g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
A domino reaction between alkyl 2-aroyl-1-chlorocyclopropanecarboxylates 1 and acylhydrazono esters 2 proceeded readily in the presence of Cs2CO3 to afford 2,3,5-trifunctionalized pyrroles in good to excellent yields.
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Affiliation(s)
- Zhimei Huang
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan 430074
- People’s Republic of China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan 430074
- People’s Republic of China
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18
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Alnasleh BK, Rubina M, Rubin M. Templated assembly of medium cyclic ethers via exo-trig nucleophilic cyclization of cyclopropenes. Chem Commun (Camb) 2016; 52:7494-6. [PMID: 27210442 DOI: 10.1039/c6cc02178f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel method for the assembly of medium heterocycles via an intramolecular nucleophilic addition to cyclopropenes is described. The exo-trig nucleophilic cyclizations were shown to proceed very efficiently and in a highly diastereoselective fashion affording cis-fused bicyclic products possessing 7 to 10-membered medium rings; starting from a diastereomeric mixtures of bromocyclopropanes.
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Affiliation(s)
| | - Marina Rubina
- Department of Chemistry
- University of Kansas
- Lawrence
- USA
| | - Michael Rubin
- Department of Chemistry
- University of Kansas
- Lawrence
- USA
- Department of Chemistry
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