1
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Zhang ZJ, Song J. An isothiourea-catalyzed asymmetric formal [4 + 2] cycloaddition of in situ generated azoalkenes with C1 ammonium enolates. Org Chem Front 2018. [DOI: 10.1039/c8qo00657a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An efficient isothiourea-catalyzed stereoselective formal [4 + 2] cycloaddition of α-chloro cyclic hydrazones with carboxylic acids has been developed.
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Affiliation(s)
- Zi-Jing Zhang
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Jin Song
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
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2
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Zhao HW, Pang HL, Zhao YD, Liu YY, Zhao LJ, Chen XQ, Song XQ, Feng NN, Du J. Construction of 2,3,4,5-tetrahydro-1,2,4-triazines via [4 + 2] cycloaddition of α-halogeno hydrazones to imines. RSC Adv 2017. [DOI: 10.1039/c6ra27767e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In the presence of sodium carbonate, the [4 + 2] cycloaddition of α-halogeno hydrazones to imines proceeded readily, and furnished 2,3,4,5-tetrahydro-1,2,4-triazines in moderate to high chemical yields.
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Affiliation(s)
- Hong-Wu Zhao
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Hai-Liang Pang
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Yu-Di Zhao
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Yue-Yang Liu
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Li-Jiao Zhao
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Xiao-Qin Chen
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Xiu-Qing Song
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Ning-Ning Feng
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Juan Du
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
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3
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Amr FI, Vila C, Blay G, Muñoz MC, Pedro JR. Organocatalytic Enantioselective Alkylation of Pyrazol-3-ones with Isatin-Derived Ketimines: Stereocontrolled Construction of Vicinal Tetrasubstituted Stereocenters. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600036] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Zhao HW, Pang HL, Li B, Tian T, Chen XQ, Song XQ, Meng W, Yang Z, Liu YY, Zhao YD. Direct access to non-aromatic 1,2,3,6-tetrahydro-1,2,3,4-tetrazines via [4 + 2] cycloaddition of α-halogeno hydrazones with azodicarboxylic acid derivatives. RSC Adv 2016. [DOI: 10.1039/c6ra01359g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Construction of non-aromatic 1,2,3,6-tetrahydro-1,2,3,4-tetrazines through [4 + 2] cycloaddition of α-halogeno hydrazones with azodicarboxylic acid derivatives.
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Affiliation(s)
- Hong-Wu Zhao
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Hai-Liang Pang
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Bo Li
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Ting Tian
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Xiao-Qin Chen
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Xiu-Qing Song
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Wei Meng
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Zhao Yang
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Yue-Yang Liu
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Yu-Di Zhao
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
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5
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Mao S, Geng X, Yang Y, Qian X, Wu S, Han J, Wang L. Base promoted direct C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts. RSC Adv 2015. [DOI: 10.1039/c5ra03819g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A metal-free approach for the C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts was developed.
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Affiliation(s)
- Song Mao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xu Geng
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yang Yang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xiaofei Qian
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Shengying Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Jianwei Han
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis
- Shanghai Institute of Organic Chemistry
- The Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Limin Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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6
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Parekh N, Thomas J, John J, Kusurkar R, De Borggraeve WM, Dehaen W. Synthetic Protocol toward Fused Pyrazolone Derivatives via a Michael Addition and Reductive Ring Closing Strategy. J Org Chem 2014; 79:5338-44. [DOI: 10.1021/jo5005795] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nikita Parekh
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven , Celestijnenlaan 200F, 3001 Leuven, Belgium
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7
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Lu Z, Xie C, Han J, Pan Y. Tandem 1,5-migration/Michael reactions to prepare adducts of pyrazolone derivatives: protecting group-directed rearrangement. RSC Adv 2012. [DOI: 10.1039/c2ra21549g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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8
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Liao YH, Chen WB, Wu ZJ, Du XL, Cun LF, Zhang XM, Yuan WC. Organocatalytic Asymmetric Michael Addition of Pyrazolin-5-ones to Nitroolefins with Bifunctional Thiourea: Stereocontrolled Construction of Contiguous Quaternary and Tertiary Stereocenters. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900764] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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9
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Attanasi OA, De Crescentini L, Favi G, Filippone P, Mantellini F, Perrulli FR, Santeusanio S. Cultivating the Passion to Build Heterocycles from 1,2‐Diaza‐1,3‐dienes: the Force of Imagination. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900243] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Orazio A. Attanasi
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
| | - Lucia De Crescentini
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
| | - Gianfranco Favi
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
| | - Paolino Filippone
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
| | - Fabio Mantellini
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
| | - Francesca R. Perrulli
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
| | - Stefania Santeusanio
- Istituto di Chimica Organica, Università degli Studi di Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino (PU), Italy, Fax: +39‐0722‐303441
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10
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Wang K, Fu X, Liu J, Liang Y, Dong D. PIFA-Mediated Oxidative Cyclization of 1-Carbamoyl-1-oximylcycloalkanes: Synthesis of Spiro-Fused Pyrazolin-5-one N-Oxides. Org Lett 2009; 11:1015-8. [DOI: 10.1021/ol802952e] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kewei Wang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Xiaolan Fu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Jinying Liu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Yongjiu Liang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Dewen Dong
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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11
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Aparicio D, Attanasi OA, Filippone P, Ignacio R, Lillini S, Mantellini F, Palacios F, de Los Santos JM. Straightforward Access to Pyrazines, Piperazinones, and Quinoxalines by Reactions of 1,2-Diaza-1,3-butadienes with 1,2-Diamines under Solution, Solvent-Free, or Solid-Phase Conditions. J Org Chem 2006; 71:5897-905. [PMID: 16872170 DOI: 10.1021/jo060450v] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation of tetrahydropyrazines, dihydropyrazines, pyrazines, piperazinones, and quinoxalines by 1,4-addition of 1,2-diamines to 1,2-diaza-1,3-butadienes bearing carboxylate, carboxamide, or phosphorylated groups at the terminal carbon and subsequent internal heterocyclization is described. The solvent-free reaction of carboxylated 1,2-diaza-1,3-butadienes with the same reagents affords piperazinones, while phosphorylated 1,2-diaza-1,3-butadienes yield phosphorylated pyrazines. The solid-phase reaction of polymer-bound 1,2-diaza-1,3-butadienes with 1,2-diamines produces pyrazines.
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Affiliation(s)
- Domitila Aparicio
- Istituto di Chimica Organica, Università degli Studi di Urbino "Carlo Bo", Via Sasso 75, 61029 Urbino, Italy
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12
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Attanasi OA, De Crescentini L, Favi G, Filippone P, Lillini S, Mantellini F, Santeusanio S. Efficient Synthesis and Environmentally Friendly Reactions of PEG-Supported 1,2-Diaza-1,3-butadiene. Org Lett 2005; 7:2469-71. [PMID: 15932225 DOI: 10.1021/ol050775i] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Here, we report the protocol for the preparation of new poly(ethylene glycol)-supported 1,2-diaza-1,3-butadiene. In addition, we discuss an application of this supported reagent in an efficient and environmentally friendly one-pot synthesis of 2-thiazol-4-one derivatives by reaction with thioamides.
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Affiliation(s)
- Orazio A Attanasi
- Istituto di Chimica Organica della Facoltà di Scienze Matematiche, Fisiche e Naturali, Università degli Studi di Urbino Carlo Bo, Via Sasso 75, 61029 Urbino, Italy
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13
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Ganesan A. Cyclative Cleavage Strategies for the Solid-Phase Synthesis of Heterocycles and Natural Products. Methods Enzymol 2003; 369:415-34. [PMID: 14722966 DOI: 10.1016/s0076-6879(03)69022-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Affiliation(s)
- A Ganesan
- University of Southampton, Department of Chemistry, Highfield, Southampton, SO17 1BJ, United Kingdom
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14
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Solid-phase synthesis of 4-triphenylphosphoranylidene-4,5-dihydropyrazol-5-ones, 4-aminocarbonyl-pyrroles, 4-methoxy-1H-pyrazol-5(2H)-ones and 2-thiazolin-4-ones from polymer-bound 1,2-diaza-1,3-butadienes. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00523-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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16
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Abstract
Nowadays it is rare to find an issue of a major chemistry journal without at least one article on solid-phase synthesis. This is hardly surprising: the technique promises an end to arduous work-up procedures and the ability to facilitate the creation of vast libraries of compounds using combinatorial techniques. No longer is the technique only of interest to those involved in peptide synthesis: an enormous variety of product classes have now been prepared on and isolated from the solid phase. It is the "linker" which is the focus of this article. The linker's ultimate function is to release a product from the support into solution: it does this, without exception, with a chemical change to the product at the former linkage site. Some linkers, apparently, are "traceless". But what, in fact, is "tracelessness"? Twenty years ago, in a climate where cleavage of a linker resulted in formation of a polar carboxylic acid as the vestige of the support, the concept was attractive. Today the chemist is faced with a myriad of novel linkers which have the ability to release products bearing most major functionalities at the former linkage site and we will argue here that the term "traceless", although currently in widespread use, is meaningless. Instead, we propose a new categorization of linkers based on the functionality they release upon cleavage, and suggest a nomenclature to underpin this categorization. We anticipate that the article will also serve to highlight areas of linker technology in need of further research.
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Affiliation(s)
- Alex C. Comely
- Department of Chemistry King's College, London, Strand London, WC2R 2LS (UK)
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17
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Attanasi OA, Filippone P, Perrulli FR, Santeusanio S. Regioselective role of the hydrazide moiety in the formation of complex pyrrole–pyrazole systems. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(00)01125-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Attanasi OA, Filippone P, Fiorucci C, Mantellini F. Reaction between Conjugated Azoalkenes and Pyrazolinones: A Precious Entry to New Conjugated Azodiene and Asymmetric 4,4′-Bipyrazole Derivatives. CHEM LETT 2000. [DOI: 10.1246/cl.2000.984] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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