1
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Pineschi M. Boron Reagents and Catalysts for the Functionalization of Strained Heterocycles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001493] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mauro Pineschi
- Department of Pharmacy University of Pisa Via Bonanno 33 56126 Pisa Italy Tel
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2
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Chen D, Yao Y, Yang W, Lin Q, Li H, Wang L, Chen S, Tan Y, Yang D. Palladium-Catalyzed syn-Stereocontrolled Ring Opening of Oxabicyclic Alkenes with Arylsulfonyl Hydrazides. J Org Chem 2019; 84:12481-12489. [PMID: 31512473 DOI: 10.1021/acs.joc.9b01957] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel palladium-catalyzed ring-opening reaction of oxabicyclic alkenes with arylsulfonyl hydrazides was first developed. In this work, we provide an efficient one-pot reaction to afford the corresponding cis-2-aryl-1,2-dihydronaphthalen-1-ols and 2-aryl-naphthalenes in moderate to excellent yields (up to 95%) under an open-air condition. Various types of functional groups attached to the substrates were tolerated well in this method. Among them, the cis-1,2-configuration of product 3ag was confirmed by X-ray crystallographic analysis. In addition, a plausible mechanism for ring opening was also proposed.
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Affiliation(s)
- Donghan Chen
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
| | - Yongqi Yao
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
| | - Wen Yang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
| | - Qifu Lin
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
| | - Huanyong Li
- Analytical and Testing Center , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Lin Wang
- Analytical and Testing Center , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Shuqi Chen
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
| | - Yun Tan
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
| | - Dingqiao Yang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of Chemistry , South China Normal University , Guangzhou 510006 , People's Republic of China
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3
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Tait K, Koh S, Blanchard N, Tam W. Ruthenium-catalyzed ring-opening reaction of a 3-aza-2-oxabicyclo[2.2.1]hept-5-ene with amines — an unexpected mode of ring-opening. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The ruthenium-catalyzed ring-opening reaction of a 3-aza-2-oxabicyclo[2.2.1]hept-5-ene with amines was investigated. In the presence of an amine and a ruthenium catalyst, the N–O bond is cleaved, forming a ring-opened allylic alcohol product. Through a possible ruthenium-catalyzed redox isomerization, the allylic alcohol is transformed into a saturated carbonyl product. This unexpected mode of ruthenium-catalyzed ring-opening reaction of a 3-aza-2-oxabicyclo[2.2.1]hept-5-ene leads to the formation of a cyclopentanone derivative in moderate yields.
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Affiliation(s)
- Katrina Tait
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Samuel Koh
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Nicolas Blanchard
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France
| | - William Tam
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
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4
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Shen G, Khan R, Yang F, Yang Y, Pu D, Gao Y, Zhan Y, Luo Y, Fan B. Pd/Zn Co-catalyzed Asymmetric Ring-Opening Reactions of Aza/Oxabicyclic Alkenes with Oximes. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800569] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Guoli Shen
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine/Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; Kunming 650500 China
| | - Ruhima Khan
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine/Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; Kunming 650500 China
| | - Fan Yang
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine/Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; Kunming 650500 China
| | - Yong Yang
- Chongqing Academy of Chinese Materia Medica; Chongqing 400065 China
| | - Dongdong Pu
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine/Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; Kunming 650500 China
| | - Yang Gao
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine/Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; Kunming 650500 China
| | - Yong Zhan
- Chongqing Academy of Chinese Materia Medica; Chongqing 400065 China
| | - Yang Luo
- Chongqing Academy of Chinese Materia Medica; Chongqing 400065 China
| | - Baomin Fan
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine/Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; Kunming 650500 China
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5
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Tait K, Horvath A, Blanchard N, Tam W. Acid-catalyzed ring-opening reactions of a cyclopropanated 3-aza-2-oxabicyclo[2.2.1]hept-5-ene with alcohols. Beilstein J Org Chem 2018; 13:2888-2894. [PMID: 29564016 PMCID: PMC5753073 DOI: 10.3762/bjoc.13.281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 12/17/2017] [Indexed: 11/23/2022] Open
Abstract
The acid-catalyzed ring-opening reactions of a cyclopropanated 3-aza-2-oxabicylic alkene using alcohol nucleophiles were investigated. Although this acid-catalyzed ring-opening reaction did not cleave the cyclopropane unit as planned, this represent the first examples of ring-openings of cyclopropanated 3-aza-2-oxabicyclo[2.2.1]alkenes that lead to the cleavage of the C-O bond instead of the N-O bond. Different acid catalysts were tested and it was found that pyridinium toluenesulfonate in methanol gave the best yields in the ring-opening reactions. The scope of the reaction was successfully expanded to include primary, secondary, and tertiary alcohol nucleophiles. Through X-ray crystallography, the stereochemistry of the product was determined which confirmed an SN2-like mechanism to form the ring-opened product.
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Affiliation(s)
- Katrina Tait
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Alysia Horvath
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Nicolas Blanchard
- Laboratoire de Chimie Moléculaire, ECPM-CNRS UMR7509, University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| | - William Tam
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
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6
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An efficient stereoselective synthesis of aminocyclohexenes from 7-azanorbornenes via LiAlH 4 mediated tandem double bond migration-ring opening sequence. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Liebov BK, Harman WD. Group 6 Dihapto-Coordinate Dearomatization Agents for Organic Synthesis. Chem Rev 2017; 117:13721-13755. [DOI: 10.1021/acs.chemrev.7b00480] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin K. Liebov
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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8
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Bis(pyrazolyl)acetate and bis(3,5-dimethylpyrazolyl)acetate tris -acetonitrile ruthenium(II) complexes: Synthesis, properties, and structure. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Abstract
The nitrosocarbonyls (R-CONO) are highly reactive species and remarkable intermediates toward different synthetic targets. This review will cover a research area whose impact in current organic synthesis is constantly increasing in the chemical community. This review represents the first and comprehensive picture on the generation and trapping of nitrosocarbonyls and is solidly built on more than 380 papers. Six different classes of key starting materials such as hydroxamic acids, N-hydroxy carbamates, N-hydroxyureas, nitrile oxides, and 1,2,4-oxadiazole-4-oxides were highlighted. The content of the review surveys all the methods to generate the nitrosocarbonyls through different approaches (oxidative, thermal, photochemical, catalytic, aerobic, and the less common ones) in the light of efficiency, yields, and mildness. The most successful trapping agents employed to catch these fleeting intermediates are reviewed, exploiting their superior dienophilic, enophilic, and electrophilic power. The work is completed by paragraphs dedicated to the detection of the intermediates, theoretical studies, and insights about the challenges and future directions for the field.
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Affiliation(s)
- Misal Giuseppe Memeo
- Dipartimento di Chimica, Università degli Studi di Pavia , Viale Taramelli 12, 27100 Pavia, Italy
| | - Paolo Quadrelli
- Dipartimento di Chimica, Università degli Studi di Pavia , Viale Taramelli 12, 27100 Pavia, Italy
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10
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Duret G, Quinlan R, Yin B, Martin RE, Bisseret P, Neuburger M, Gandon V, Blanchard N. Intramolecular Inverse Electron-Demand [4 + 2] Cycloadditions of Ynamides with Pyrimidines: Scope and Density Functional Theory Insights. J Org Chem 2017; 82:1726-1742. [PMID: 28059511 DOI: 10.1021/acs.joc.6b02986] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
4-Aminopyridines are valuable scaffolds for the chemical industry in general, from life sciences to catalysis. We report herein a collection of structurally diverse polycyclic fused and spiro-4-aminopyridines that are prepared in only three steps from commercially available pyrimidines. The key step of this short sequence is a [4 + 2]/retro-[4 + 2] cycloaddition between a pyrimidine and an ynamide, which constitutes the first examples of ynamides behaving as electron-rich dienophiles in [4 + 2] cycloaddition reactions. In addition, running the ihDA/rDA reaction in continuous mode in superheated toluene, to overcome the limited scalability of MW reactions, results in a notable production increase compared to batch mode. Finally, density functional theory investigations shed light on the energetic and geometric requirements of the different steps of the ihDA/rDA sequence.
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Affiliation(s)
- Guillaume Duret
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Robert Quinlan
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Boyang Yin
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Rainer E Martin
- Medicinal Chemistry, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche, Ltd. , Grenzacherstrasse 124, Basel CH-4070, Switzerland
| | - Philippe Bisseret
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Markus Neuburger
- Department of Chemistry, University of Basel , Spitalstrasse 51, Basel CH-4056, Switzerland
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay , bâtiment 420, Orsay cedex 91405, France.,Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay , 1 av. de la Terrasse, Gif-sur-Yvette 91198, France
| | - Nicolas Blanchard
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
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11
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Wu R, Yang W, Chen W, Yang D. Platinum-catalyzed syn-stereocontrolled ring-opening of oxabicyclic alkenes with sodium arylsulfinates. Org Chem Front 2017. [DOI: 10.1039/c7qo00420f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A new efficient platinum-catalyzed ring-opening reaction of oxabicyclic alkenes with a wide range of sodium arylsulfinates was developed.
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Affiliation(s)
- Ruihua Wu
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- School of Chemistry and Environment
- South China Normal University
- Guangzhou 510006
| | - Wen Yang
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- School of Chemistry and Environment
- South China Normal University
- Guangzhou 510006
| | - Wenkun Chen
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- School of Chemistry and Environment
- South China Normal University
- Guangzhou 510006
| | - Dingqiao Yang
- Key Laboratory of Theoretical Chemistry of Environment
- Ministry of Education
- School of Chemistry and Environment
- South China Normal University
- Guangzhou 510006
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12
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An easy access to fused chromanones via rhodium catalyzed oxidative coupling of salicylaldehydes with heterobicyclic olefins. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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13
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Yang D, Xia J, Long Y, Zeng Z, Zuo X, Wang S, Li C. Iridium-catalyzed asymmetric ring-opening of azabicyclic alkenes with alcohols. Org Biomol Chem 2013; 11:4871-81. [DOI: 10.1039/c3ob40891d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Durham R, Mandel J, Blanchard N, Tam W. Ruthenium-catalyzed [2+2] cycloaddition reactions of a 2-oxa-3-azabicyclo[2.2.1]hept-5-ene with unsymmetrical alkynes. CAN J CHEM 2011. [DOI: 10.1139/v11-135] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ruthenium-catalyzed [2+2] cycloaddition reactions of a 2-oxa-3-azabicyclo[2.2.1]hept-5-ene with unsymmetrical alkynes were investigated. Yields of up to 90% were obtained though regioselectivity was modest. Select cycloadducts could be separated and used to access a highly functionalized [3.2.0] bicyclic structure through reductive cleavage of the N–O bond. These ring-opened products displayed a chemical exchange phenomenon in 1D carbon NMR and required characterization by 2D NMR techniques.
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Affiliation(s)
- Robin Durham
- Guelph–Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Jérémie Mandel
- Université de Haute-Alsace, École Nationale Supérieure de Chimie de Mulhouse, Laboratoire de Chimie Organique et Bioorganique EA4566, 3 rue A. Werner, 68093 Mulhouse CEDEX, France
| | - Nicolas Blanchard
- Université de Haute-Alsace, École Nationale Supérieure de Chimie de Mulhouse, Laboratoire de Chimie Organique et Bioorganique EA4566, 3 rue A. Werner, 68093 Mulhouse CEDEX, France
| | - William Tam
- Guelph–Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
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15
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Harrison DP, Iovan DA, Myers WH, Sabat M, Wang S, Zottig VE, Harman WD. [4 + 2] Cyclocondensation reactions of tungsten-dihydropyridine complexes and the generation of tri- and tetrasubstituted piperidines. J Am Chem Soc 2011; 133:18378-87. [PMID: 21961580 DOI: 10.1021/ja2075086] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new method for the preparation of functionalized piperidines is described in which various dihydropyridine (DHP) complexes of {TpW(NO)(PMe(3))} that are derived from pyridine-borane undergo [4 + 2] cyclocondensation with enones, enals, nitrosobenzene, and several isocyanates to form [2.2.2] bicyclic species. In several cases the diazabicyclooctene products derived from DHP complexes and isocyanates can be further elaborated into novel syn-2,5-disubstituted and 2,3,6-trisubstituted piperidinamides.
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Affiliation(s)
- Daniel P Harrison
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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16
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Ji C, Miller MJ. Cyclopropanation of nitroso Diels-Alder cycloadducts and application to the synthesis of a 2',3'-methano carbocyclic nucleoside. Tetrahedron Lett 2010; 51:3789-3791. [PMID: 20607121 PMCID: PMC2894734 DOI: 10.1016/j.tetlet.2010.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Treatment of nitroso Diels-Alder cycloadducts 1 with diazomethane in the presence of palladium acetate gives synthetically useful exo-6-oxa-7-azatricyclo[3.2.1.02,4]octane derivatives 7 in good to excellent yield. Using this methodology, a conformationally restricted 2',3'-methano carbocyclic nucleoside was efficiently synthesized from nitroso cycloadduct 1a in 7 steps.
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Affiliation(s)
- Cheng Ji
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana, 46556, United States
| | - Marvin J. Miller
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana, 46556, United States
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17
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Crotti S, Bertolini F, Macchia F, Pineschi M. Copper-promoted rearrangement of 1,3-cyclohexadiene-acylnitroso cycloadducts. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Calvet G, Coote SC, Blanchard N, Kouklovsky C. α-Acyloxynitroso dienophiles in [4+2] hetero Diels–Alder cycloadditions: mechanistic insights. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.02.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Crotti S, Bertolini F, Bussolo VD, Pineschi M. Regioselective Copper-Catalyzed Alkylation of [2.2.2]-Acylnitroso Cycloadducts: Remarkable Effect of the Halide of Grignard Reagents. Org Lett 2010; 12:1828-30. [DOI: 10.1021/ol100454c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefano Crotti
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Ferruccio Bertolini
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Valeria di Bussolo
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Mauro Pineschi
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
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20
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Yang B, Miller MJ. Indium triflate-assisted nucleophilic aromatic substitution reactions of nitrosobezene-derived cycloadducts with alcohols. Org Lett 2010; 12:392-5. [PMID: 20000806 DOI: 10.1021/ol9027607] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Exclusive nucleophilic aromatic substitution of hydrogen in conjunction with cleavage of the N-O bond was observed when nitrosobenzene-derived nitroso cycloadducts were treated with indium triflate in the presence of alcohols. Aromatic alkoxylated syn-1,4 aminocycloalkenol products with good to excellent regioselectivity (16:84 to 0:100, ortho:para) were obtained.
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Affiliation(s)
- Baiyuan Yang
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA
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21
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Yang B, Miller MJ. Regio- and stereochemically controlled formation of hydroxamic acids from indium triflate-mediated nucleophilic ring-opening reactions with acylnitroso-Diels-Alder adducts. Tetrahedron Lett 2010; 51:889-891. [PMID: 20209116 PMCID: PMC2830661 DOI: 10.1016/j.tetlet.2009.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of acylnitroso-Diels-Alder [2.2.1] bicyclic adducts 2a-b with indium triflate in an alcohol solvent induces ring opening reactions to afford monocyclic anti-1,2-, anti-1,4- and syn-1,4-hydroxamic acids with good to excellent regio- and stereoselectivity (up to 7:86:7). Treatment of [2.2.2] bicyclic nitroso adducts 2c-d under similar reaction conditions generates only anti-1,2- and anti-1,4-hydroxamic acids with anti-1,4-product predominant (up to 17:83).
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Affiliation(s)
- Baiyuan Yang
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Marvin J. Miller
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, United States
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22
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Miura T, Shimizu H, Igarashi T, Murakami M. Stereoselective synthesis of vinyl-substituted (Z)-stilbenes by rhodium-catalysed addition of arylboronic acids to allenic alcohols. Org Biomol Chem 2010; 8:4074-6. [DOI: 10.1039/c0ob00163e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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