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A synthesis of carbonyl-substituted 4-aryl-4H-benzo[h]chromenes based on a three-component condensation of α-naphthol, aromatic aldehydes, and β-enaminones. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03130-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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2
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Zhu C, Han MY, Liang XX, Guan B, Li P, Wang L. Hydrogen-Bond-Assisted Sequential Reaction of Silyl Glyoxylates: Stereoselective Synthesis of Silyl Enol Ethers. Org Lett 2021; 23:54-59. [PMID: 33320686 DOI: 10.1021/acs.orglett.0c03683] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel hydrogen-bond-assisted sequential reaction of silyl glyoxylates is described. This method provides an efficient strategy for the synthesis of silyl enol ethers with high selectivity. In these transformations, hydrogen bonds from 2-nitroethanol and its derivatives are critical to the stereochemical outcome. Both E- and Z-isomers are achieved via Henry reaction/Brook rearrangement/elimination and Henry reaction/Brook rearrangement/retro-Henry reaction/elimination processes, respectively (up to 99:1 Z-selectivity, and 9.2:1 E-selectivity).
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Affiliation(s)
- Chen Zhu
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Man-Yi Han
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Xiu-Xia Liang
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Bin Guan
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Pinhua Li
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P.R. China
| | - Lei Wang
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P.R. China.,Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P.R. China
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3
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Basak S, Mal D. Applications of [4+2] Anionic Annulation and Carbonyl-Ene Reaction in the Synthesis of Anthraquinones, Tetrahydroanthraquinones, and Pyranonaphthoquinones. J Org Chem 2017; 82:11035-11051. [DOI: 10.1021/acs.joc.7b01987] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shyam Basak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Dipakranjan Mal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Matsuya Y, Wada K, Minato D, Sugimoto K. Highly Efficient Access to Both Geometric Isomers of Silyl Enol Ethers: Sequential 1,2-Brook/Wittig Reactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuji Matsuya
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; 2630 Sugitani Toyama 930-0194 Japan
| | - Kentaro Wada
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; 2630 Sugitani Toyama 930-0194 Japan
| | - Daishiro Minato
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; 2630 Sugitani Toyama 930-0194 Japan
| | - Kenji Sugimoto
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; 2630 Sugitani Toyama 930-0194 Japan
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Matsuya Y, Wada K, Minato D, Sugimoto K. Highly Efficient Access to Both Geometric Isomers of Silyl Enol Ethers: Sequential 1,2-Brook/Wittig Reactions. Angew Chem Int Ed Engl 2016; 55:10079-82. [PMID: 27403766 DOI: 10.1002/anie.201604945] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Indexed: 11/11/2022]
Abstract
Novel sequential 1,2-Brook/Wittig reactions were developed for the preparation of silyl enol ethers. This method enables highly selective preparation of both geometric isomers of glyoxylate silyl enol ethers, using aldehydes (E-selective) and tosylimines (Z-selective) as a Wittig electrophile. The salt-free conditions of this reaction system are likely to be advantageous for switching the selectivity. The optimal reaction conditions and generality of the reaction were investigated, and plausible explanations for the observed selectivity were also discussed.
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Affiliation(s)
- Yuji Matsuya
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan.
| | - Kentaro Wada
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Daishiro Minato
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Kenji Sugimoto
- Laboratory of Synthetic and Medicinal Chemistry, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
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Reimann S, Bunescu A, Petrosyan A, Sharif M, Erfle S, Mamat C, Ghochikyan TV, Saghyan AS, Spannenberg A, Villinger A, Langer P. Regioselective Synthesis of Trichloromethyl-Substituted Salicylates and Cyclohexenones by One-Pot Cyclizations of 1,3-Bis(trimethylsilyloxy)buta-1,3-dienes. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Eleya N, Patonay T, Villinger A, Langer P. Synthesis of Dimethyl Tetraarylphthalates bySuzukiMiyauraReactions of Dimethyl Tetrabromophthalate. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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