1
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Wei Y, Wang G, Zhang Z, Li M, Ma N, Wu H, Zhang G. Cope Rearrangement of 1-Acyl-2-vinylcyclopropanes to Cyclohept-4-Enones. J Org Chem 2024. [PMID: 38166204 DOI: 10.1021/acs.joc.3c02319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Cycloheptenones are widespread in natural products and bioactive molecules. An efficient and convenient NaH-mediated Cope Rearrangement of doubly activated vinylcyclopropanes is reported for the synthesis of cyclohepten-4-ones. These flexible intramolecular reactions were applicable to a wide range of substrates and could be performed on gram scale. The derivatization of the product leads to short and highly efficient synthesis of some useful functional molecules.
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Affiliation(s)
- Yinhe Wei
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Gang Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Mengjuan Li
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Nana Ma
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Hao Wu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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2
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Zhang G, Chen L, Hu Z, Zhang Z, Bi J, Li M, Zhang X. Organocatalytic Cloke-Wilson Rearrangement: Carbocation-Initiated Tandem Ring Opening/Cyclization of Cyclopropanes under Neutral Conditions. J Org Chem 2023; 88:1003-1017. [PMID: 36626186 DOI: 10.1021/acs.joc.2c02415] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report a metal-, acid-, and base-free 2-(bromomethyl)naphthalene (2-BMN)-promoted organocatalytic Cloke-Wilson rearrangement of chain doubly activated cyclopropanes for the construction of 2,3-dihydrofurans via a carbocation-initiated tandem intramolecular ring-opening/recyclization process. The strategy is especially suitable for the construction of furan units in complex molecules, providing a solution to the problem of heavy-metal residues in dihydrofuran-containing drugs synthesized by traditional metal-based protocols. Thus, it is of potential interest in synthetic and medicinal chemistry.
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Affiliation(s)
- Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Liming Chen
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Zhaokang Hu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Jingjing Bi
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Mengjuan Li
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Xingjie Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China.,School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
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3
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Han XD, Peng GL, Wang HB, Wu L, Fu JP, Tang ZS, Hu JW, Xiong W. Novel synthesis of fused spiro piperidone-cyclopropanes from cyclopropyl amides and electron-deficient alkenes. Org Biomol Chem 2021; 19:3191-3198. [PMID: 33885573 DOI: 10.1039/d1ob00214g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here that a series of bridged O,O-ketal fused spiro piperidone-cyclopropane derivatives 3 can be constructed with excellent yields and good diastereoselectivity by the one-pot reaction of 1-acylcyclopropanecarboxamides 1 with electron-deficient alkene 2a (EWG = CHO) via the domino process involving [4 + 2] annulation/intermolecular electrophilic addition/intramolecular cyclization. Furthermore, reactions of 1 with 2b/2c (EWG = CN, COOMe), leading to spiro piperidone-cyclopropane derivatives 4 or 5 by base catalyst selection, were also presented.
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Affiliation(s)
- Xiao-Dan Han
- Department of Applied Chemistry, Jiang Xi Academic of Sciences, Nanchang, 330096, China.
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4
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Maejima S, Yamaguchi E, Itoh A. Three-Component Iminolactonization Reaction via Bifunctionalization of Olefins Using Molecular Iodine and Visible Light. J Org Chem 2020; 85:10709-10718. [PMID: 32806099 DOI: 10.1021/acs.joc.0c01251] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel three-component γ-iminolactonization reaction was developed, which relied on the C-C/C-O bond-forming bifunctionalization of olefins using molecular iodine and visible light. This strategy did not require any (heavy) metal reagents for double-bond activation because molecular iodine acted as a rare-metal-alternative reagent through visible light irradiation. In addition, the preactivation of amines and other substrates is not required. The mechanistic investigation revealed that the generated iodine radicals under visible light irradiation reacted with alkenes to form a highly reactive intermediate; then, the three-component reaction of diiodide, malonate, and amine furnished iminolactone. Of note, the developed reaction is simple and realized the diversity-oriented synthesis innovative methodology of γ-iminolactone derivatives in drug discovery chemistry.
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Affiliation(s)
- Saki Maejima
- Gifu Pharmaceutical University, 1-25-4, Daigaku-Nishi, Gifu-shi, Gifu 501-1196, Japan
| | - Eiji Yamaguchi
- Gifu Pharmaceutical University, 1-25-4, Daigaku-Nishi, Gifu-shi, Gifu 501-1196, Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University, 1-25-4, Daigaku-Nishi, Gifu-shi, Gifu 501-1196, Japan
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5
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Zhan S, Yan C. Efficient Synthesis of Functionalized 6‐(2‐Oxoindolin‐3‐yl)‐5‐azaspiro[2.4]heptanes. ChemistrySelect 2019. [DOI: 10.1002/slct.201902785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shao‐Cong Zhan
- School of Chemistry & Chemical EngineeringYangzhou University Yangzhou 225002 China
| | - Chao‐Guo Yan
- School of Chemistry & Chemical EngineeringYangzhou University Yangzhou 225002 China
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6
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Zhang Z, Zhang F, Wang H, Wu H, Duan X, Liu Q, Liu T, Zhang G. Catalyst-Free Domino Reaction of 1-Acryloyl-1-N-arylcarbamylcyclopropanes with Amines: One-Pot Approach to 2,3,6,7-Tetrahydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-ones. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500251] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Fernández-Rodríguez MJ, Martínez-Viviente E, Vicente J, Jones PG. Synthesis of Arylpalladium(II) Complexes Derived from Benzyl Alcohol, Reactivity toward Alkyl Halides, and Synthesis of Dinuclear Arylpalladium(II) Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00309] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- María-José Fernández-Rodríguez
- Grupo de
Química Organometálica,
Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apartado 4021, 30071, Murcia, Spain
| | - Eloísa Martínez-Viviente
- Grupo de
Química Organometálica,
Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apartado 4021, 30071, Murcia, Spain
| | - José Vicente
- Grupo de
Química Organometálica,
Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apartado 4021, 30071, Murcia, Spain
| | - Peter G. Jones
- Institut für Anorganische und Analytische Chemie der Technischen Universität Braunschweig, Postfach 3329, 38023, Braunschweig, Germany
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8
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Zhang Z, Zhang W, Li J, Liu Q, Liu T, Zhang G. Synthesis of Multisubstituted Pyrroles from Doubly Activated Cyclopropanes Using an Iron-Mediated Oxidation Domino Reaction. J Org Chem 2014; 79:11226-33. [DOI: 10.1021/jo5018487] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhiguo Zhang
- Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
Key Laboratory of Green Chemical Media and Reactions, Ministry of
Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Wei Zhang
- Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
Key Laboratory of Green Chemical Media and Reactions, Ministry of
Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Junlong Li
- Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
Key Laboratory of Green Chemical Media and Reactions, Ministry of
Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Qingfeng Liu
- Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
Key Laboratory of Green Chemical Media and Reactions, Ministry of
Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Tongxin Liu
- Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
Key Laboratory of Green Chemical Media and Reactions, Ministry of
Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Guisheng Zhang
- Collaborative Innovation
Center of Henan Province for Green Manufacturing of Fine Chemicals,
Key Laboratory of Green Chemical Media and Reactions, Ministry of
Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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9
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Zhang Y, Zhu Y, Zheng L, Zhuo LG, Yang F, Dang Q, Yu ZX, Bai X. On-Demand Selection of the Reaction Path from Imino Diels-Alder to Ene-Type Cyclization: Synthesis of Epiminopyrimido[4,5-b]azepines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301318] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Mehta S, Waldo JP, Neuenswander B, Lushington GH, Larock RC. Solution-phase parallel synthesis of a multisubstituted cyclic imidate library. ACS COMBINATORIAL SCIENCE 2013; 15:247-54. [PMID: 23514214 DOI: 10.1021/co3001605] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The solution-phase parallel synthesis of a diverse 71-member library of multisubstituted cyclic imidates is described. The key intermediates, 3-iodomethylene-containing cyclic imidates, are readily prepared in good to excellent yields by the palladium/copper-catalyzed cross-coupling of various o-iodobenzamides and terminal alkynes, followed by electrophilic cyclization with I2. These cyclic imidates were further functionalized by palladium-catalyzed Suzuki-Miyaura, Sonogashira, carbonylative amidation, and Heck chemistry using sublibraries of commercially available building blocks.
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Affiliation(s)
- Saurabh Mehta
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Department of Applied Chemistry, Delhi Technological University, Delhi, 110042 India
| | - Jesse P. Waldo
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Benjamin Neuenswander
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047, United States
| | - Gerald H. Lushington
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas 66047, United States
| | - Richard C. Larock
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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11
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Yang W, Xu L, Chen Z, Zhang L, Miao M, Ren H. Ru-Catalyzed Synthesis of Dihydrofuroquinolines from Azido-cyclopropyl Ketones. Org Lett 2013; 15:1282-5. [DOI: 10.1021/ol400223d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Weijun Yang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China, and Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Lijun Xu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China, and Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Zhengkai Chen
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China, and Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Lili Zhang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China, and Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Maozhong Miao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China, and Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Hongjun Ren
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China, and Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
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12
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Mehta S, Yao T, Larock RC. Regio- and stereoselective synthesis of cyclic imidates via electrophilic cyclization of 2-(1-alkynyl)benzamides. A correction. J Org Chem 2012; 77:10938-44. [PMID: 23110553 DOI: 10.1021/jo301958q] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The electrophilic cyclization of 2-(1-alkynyl)benzamides affords high yields of cyclic imidates, instead of the previously reported isoindolin-1-ones, where cyclization proceeds on the oxygen of the carbonyl group rather than the nitrogen of the amide functionality. X-ray crystallography and spectroscopic techniques have been used to characterize the products. A correction is hereby provided in order to rectify the previous misassignment of structure.
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Affiliation(s)
- Saurabh Mehta
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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13
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Zhang Z, Fang S, Liu Q, Zhang G. Microwave-Assisted Facile Synthesis of Furo[3,2-b]indole Derivatives via Silver(I)-Mediated [3+2] Cycloaddition. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100767] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Miao CB, Zhang M, Tian ZY, Xi HT, Sun XQ, Yang HT. Base-Controlled Selective Conversion of Michael Adducts of Malonates with Enones in the Presence of Iodine. J Org Chem 2011; 76:9809-16. [DOI: 10.1021/jo201879t] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chun-Bao Miao
- School of
Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
| | - Min Zhang
- School of
Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
| | - Zong-Yong Tian
- School of
Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
| | - Hai-Tao Xi
- School of
Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
| | - Xiao-Qiang Sun
- School of
Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
| | - Hai-Tao Yang
- School of
Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
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15
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Zhang Z, Xue C, Liu X, Zhang Q, Liu Q. Synthesis of polysubstituted 3H-pyrimidin-4-ones from cyanoacetamides under Vilsmeier conditions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Li Y, Xu X, Tan J, Liao P, Zhang J, Liu Q. Polarity-Reversible Conjugate Addition Tuned by Remote Electronic Effects. Org Lett 2009; 12:244-7. [DOI: 10.1021/ol902551m] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yifei Li
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xianxiu Xu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jing Tan
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Peiqiu Liao
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jingping Zhang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
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17
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Maruoka H, Masumoto E, Eishima T, Okabe F, Nishida S, Yoshimura Y, Fujioka T, Yamagata K. Ring transformation of spirocyclopropanepyrazoles into pyrano[2,3-c]pyrazoles. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.117] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Ye Y, Zheng C, Fan R. Solvent-Controlled Oxidative Cyclization for Divergent Synthesis of Highly Functionalized Oxetanes and Cyclopropanes. Org Lett 2009; 11:3156-9. [DOI: 10.1021/ol9012102] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Ye
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Chen Zheng
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China, and Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China
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19
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Scott ME, Lautens M. Synthesis of Highly Functionalized Pyrrolidines via a Selective Iodide-Mediated Ring Expansion of Methylenecyclopropyl Amides. J Org Chem 2008; 73:8154-62. [DOI: 10.1021/jo802049u] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mark E. Scott
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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20
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Zhao Y, Li D, Han X, Chen L, Liu Q. Proton‐Promoted Hydroamination of 3‐Dialkylthiomethylene‐1,4‐pentadiynes witho‐Phenylenediamines: A Facile Route to Benzo[b][1,4]diazepines. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700547] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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