1
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Alonso JM, Almendros P. Deciphering the Chameleonic Chemistry of Allenols: Breaking the Taboo of a Onetime Esoteric Functionality. Chem Rev 2021; 121:4193-4252. [PMID: 33630581 PMCID: PMC8479864 DOI: 10.1021/acs.chemrev.0c00986] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Indexed: 12/19/2022]
Abstract
The allene functionality has participated in one of the most exciting voyages in organic chemistry, from chemical curiosities to a recurring building block in modern organic chemistry. In the last decades, a special kind of allene, namely, allenol, has emerged. Allenols, formed by an allene moiety and a hydroxyl functional group with diverse connectivity, have become common building blocks for the synthesis of a wide range of structures and frequent motif in naturally occurring systems. The synergistic effect of the allene and hydroxyl functional groups enables allenols to be considered as a unique and sole functionality exhibiting a special reactivity. This Review summarizes the most significant contributions to the chemistry of allenols that appeared during the past decade, with emphasis on their synthesis, reactivity, and occurrence in natural products.
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Affiliation(s)
- José M. Alonso
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pedro Almendros
- Instituto
de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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2
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Ghorai S, Lee D. Selectivity for Alkynyl or Allenyl Imidamides and Imidates in Copper-Catalyzed Reactions of Terminal 1,3-Diynes and Azides. Org Lett 2021; 23:697-701. [PMID: 33443441 DOI: 10.1021/acs.orglett.0c03861] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Copper-catalyzed reactions of terminal 1,3-diynes with electron-deficient azides to generate either 3-alkynyl or 2,3-dienyl imidamides and imidates are described. The selectivity depends on the diyne substituents and the nucleophile that reacts with the ketenimide intermediate generated from the corresponding triazole precursor. Reactions of 1,3-diynes containing a propargylic acetate afford [3]cumulenyl imidamides, while reactions using methanol as the trapping agent selectively generate 2,3-dienyl imidates. Five-membered heterocycles were obtained from 1,3-diynes containing a homopropargylic hydroxyl or amine substituent.
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Affiliation(s)
- Sourav Ghorai
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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3
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Soengas RG, Rodríguez-Solla H. Modern Synthetic Methods for the Stereoselective Construction of 1,3-Dienes. Molecules 2021; 26:molecules26020249. [PMID: 33418882 PMCID: PMC7825119 DOI: 10.3390/molecules26020249] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 11/16/2022] Open
Abstract
The 1,3-butadiene motif is widely found in many natural products and drug candidates with relevant biological activities. Moreover, dienes are important targets for synthetic chemists, due to their ability to give access to a wide range of functional group transformations, including a broad range of C-C bond-forming processes. Therefore, the stereoselective preparation of dienes have attracted much attention over the past decades, and the search for new synthetic protocols continues unabated. The aim of this review is to give an overview of the diverse methodologies that have emerged in the last decade, with a focus on the synthetic processes that meet the requirements of efficiency and sustainability of modern organic chemistry.
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4
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Hubert P, Seibel E, Beemelmanns C, Campagne J, Figueiredo RM. Stereoselective Construction of (
E,Z
)‐1,3‐Dienes and Its Application in Natural Product Synthesis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000730] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Pierre Hubert
- ICGM Univ Montpellier, CNRS, ENSCM Montpellier France
| | - Elena Seibel
- Hans-Knöll-Institute (HKI) Beutenbergstrasse 11a 07745 Jena Germany
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5
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Zhao R, Huang X, Wang M, Hu S, Gao Y, Xu P, Zhao Y. TfOH-Catalyzed Phosphinylation of 2,3-Allenols into γ-Ketophosphine Oxides. J Org Chem 2020; 85:8185-8195. [PMID: 32452681 DOI: 10.1021/acs.joc.0c00328] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The first facile and efficient acid-catalyzed direct coupling of a wide range of unprotected 2,3-allenols with arylphosphine oxides was developed, offering a general, one-step approach for the synthesis of structurally diverse γ-ketophosphine oxides accompanied by concurrent C-P/C═O bond formation with remarkable functional group tolerance and complete atom-economy under metal- and additive-free conditions. Mechanistic studies showed that this transformation involved a rearrangement and a phospha-Michael reaction.
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Affiliation(s)
- Runmin Zhao
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
| | - Xianhua Huang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
| | - Minning Wang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
| | - Shanshan Hu
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
| | - Yuxing Gao
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
| | - Pengxiang Xu
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
| | - Yufen Zhao
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 Fujian, China
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6
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Alcaide B, Almendros P, Martínez del Campo T, Martín L, Palop G, Toledano-Pinedo M. Oxidative selenofunctionalization of allenes: convenient access to 2-(phenylselanyl)-but-2-enals and 4-oxo-3-(phenylselanyl)pent-2-enoates. Org Chem Front 2019. [DOI: 10.1039/c9qo00561g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The controlled preparation of two types of α-seleno-α,β-unsaturated carbonyls, namely, α-selenoenals and α-selenoenones, have been accomplished.
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Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química. Universidad Complutense de Madrid
- 28040 Madrid
| | - Pedro Almendros
- Instituto de Química Orgánica General
- Consejo Superior de Investigaciones Científicas
- IQOG-CSIC
- 28006 Madrid
- Spain
| | - Teresa Martínez del Campo
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química. Universidad Complutense de Madrid
- 28040 Madrid
| | - Laura Martín
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química. Universidad Complutense de Madrid
- 28040 Madrid
| | - Guillermo Palop
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química. Universidad Complutense de Madrid
- 28040 Madrid
| | - Mireia Toledano-Pinedo
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química. Universidad Complutense de Madrid
- 28040 Madrid
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7
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Xia Y, Lee NK, Sabbasani VR, Gupta S, Lee D. Reaction of silylallenes with triplet molecular oxygen. Org Chem Front 2018. [DOI: 10.1039/c8qo00390d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile formal ene reaction of trisubstituted silylallenes with triplet molecular oxygen involving the cleavage of a C(sp2)–H bond has been described.
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Affiliation(s)
- Yuanzhi Xia
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Nam-Kyu Lee
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
| | | | - Saswata Gupta
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
| | - Daesung Lee
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
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8
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Xia Y, Qiu D, Wang J. Transition-Metal-Catalyzed Cross-Couplings through Carbene Migratory Insertion. Chem Rev 2017; 117:13810-13889. [PMID: 29091413 DOI: 10.1021/acs.chemrev.7b00382] [Citation(s) in RCA: 788] [Impact Index Per Article: 112.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Transition-metal-catalyzed cross-coupling reactions have been well-established as indispensable tools in modern organic synthesis. One of the major research goals in cross-coupling area is expanding the scope of the coupling partners. In the past decade, diazo compounds (or their precursors N-tosylhydrazones) have emerged as nucleophilic cross-coupling partners in C-C single bond or C═C double bond formations in transition-metal-catalyzed reactions. This type of coupling reaction involves the following general steps. First, the organometallic species is generated by various processes, including oxidative addition, transmetalation, cyclization, C-C bond cleavage, and C-H bond activation. Subsequently, the organometallic species reacts with the diazo substrate to generate metal carbene intermediate, which undergoes rapid migratory insertion to form a C-C bond. The new organometallic species generated from migratory insertion may undergo various transformations. This type of carbene-based coupling has proven to be general: various transition metals including Pd, Cu, Rh, Ni, Co, and Ir are effective catalysts; the scope of the reaction has also been extended to substrates other than diazo compounds; and various cascade processes have also been devised based on the carbene migratory insertion. This review will summarize the achievements made in this field since 2001.
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Affiliation(s)
- Ying Xia
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University , Beijing 100871, China
| | - Di Qiu
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University , Beijing 100871, China
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University , Beijing 100871, China
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9
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Alcaide B, Almendros P, Aparicio B, Lázaro-Milla C, Luna A, Faza ON. Gold-Photoredox-Cocatalyzed Tandem Oxycyclization/Coupling Sequence of Allenols and Diazonium Salts with Visible Light Mediation. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700598] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica I, Unidad Asociada al CSIC, Facultad de Química; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Pedro Almendros
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas; IQOG-CSIC; Juan de la Cierva 3 28006 Madrid Spain
| | - Borja Aparicio
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica I, Unidad Asociada al CSIC, Facultad de Química; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Carlos Lázaro-Milla
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica I, Unidad Asociada al CSIC, Facultad de Química; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Amparo Luna
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica I, Unidad Asociada al CSIC, Facultad de Química; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Olalla Nieto Faza
- Departamento de Química Orgánica, Facultade de Ciencias; Universidade de Vigo; Campus as Lagoas 32004 Ourense Spain
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10
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Vanadium(V)-mediated rearrangement/halogenation cascade: Synthesis of α-haloenones from propargyl alcohols. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Zhao Y, Wang Y, Gu Z, Wang Z. [3,3]-Sigmatropic rearrangement of allenic alcohols: stereoselective synthesis of 1,3-diene-2-ol sulfonates. Org Biomol Chem 2017; 15:4014-4021. [PMID: 28443891 DOI: 10.1039/c7ob00578d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient synthetic pathway to 1,3-diene-2-ol sulfonates involving the [3,3]-sigmatropic rearrangement of allenic alcohols with sulfonic acids under mild reaction conditions is described. These products can easily undergo reduction or transition-metal catalyzed cross-coupling reactions to yield a series of stereodefined multisubstituted 1,3-dienes.
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Affiliation(s)
- Yuyang Zhao
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P. R. China.
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12
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Huang X, Bugarin A. Direct Synthesis of α‐Allenols from TMS‐Protected Alkynes and Aldehydes Mediated by Tetrabutylammonium Fluoride. Chemistry 2016; 22:12696-700. [PMID: 27401054 DOI: 10.1002/chem.201603250] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Indexed: 01/12/2023]
Affiliation(s)
- Xiaojun Huang
- Department of Chemistry and Biochemistry University of Texas at Arlington Planetarium Place Room 130 Arlington TX 76019 USA
| | - Alejandro Bugarin
- Department of Chemistry and Biochemistry University of Texas at Arlington Planetarium Place Room 130 Arlington TX 76019 USA
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13
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Wang NN, Huang LR, Hao WJ, Zhang TS, Li G, Tu SJ, Jiang B. Synergistic Rhodium/Copper Catalysis: Synthesis of 1,3-Enynes and N-Aryl Enaminones. Org Lett 2016; 18:1298-301. [DOI: 10.1021/acs.orglett.6b00238] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Nan-Nan Wang
- School
of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Lei-Rong Huang
- School
of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Wen-Juan Hao
- School
of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Tian-Shu Zhang
- School
of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Guigen Li
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
- Institute of Chemistry & BioMedical Sciences, Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210093, P. R. China
| | - Shu-Jiang Tu
- School
of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Bo Jiang
- School
of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou 221116, P. R. China
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
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14
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Miao P, Wang H, Liu L, Chang W, Li J. Palladium-Catalyzed Highly Chemoselective Cascade Coupling-Cyclization of Allenol Derivatives and Aryl Halides for the Construction of Dihydrobenzofuranols or Chromanols and Indolinols. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500263] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pingping Miao
- The State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Weijin Road 94# Tianjin 300071 China
| | - Hongkai Wang
- The State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Weijin Road 94# Tianjin 300071 China
| | - Lingyan Liu
- The State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Weijin Road 94# Tianjin 300071 China
| | - Weixing Chang
- The State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Weijin Road 94# Tianjin 300071 China
| | - Jing Li
- The State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Weijin Road 94# Tianjin 300071 China
- the Synergetic Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
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15
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Alcaide B, Almendros P, Luna A, Soriano E. An Alternative to Precious Metals: Hg(ClO4)2·3H2O as a Cheap and Water-Tolerant Catalyst for the Cycloisomerization of Allenols. J Org Chem 2015; 80:7050-7. [PMID: 26079496 DOI: 10.1021/acs.joc.5b00887] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Benito Alcaide
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pedro Almendros
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Amparo Luna
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica I, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Elena Soriano
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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16
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Roy A, Bhat BA, Lepore SD. Organo-manganese η2-auxiliary directed reactions: a diastereoselective approach to 2,3-allenols. Org Lett 2015; 17:900-3. [PMID: 25662282 PMCID: PMC4537065 DOI: 10.1021/ol503757h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Propargyl aldehydes underwent isomerization to allenyl aldehydes under mildly basic conditions when complexed to an organo-manganese auxiliary using methylcyclopentadienyl manganese tricarbonyl (MMT). This traceless auxiliary magnifies the axial chirality of the allene moiety, allowing for highly diastereoselective additions to the aldehyde carbonyl and subsequent access to an array of 2,3-allenols. Using this strategy, a nitrile-substituted 2,3-allenol was prepared and efficiently converted to Hagen's gland lactone.
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Affiliation(s)
- Animesh Roy
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431-0991, United States
| | - Bilal A. Bhat
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431-0991, United States
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine (CSIR), Sanatnagar, Srinagar 190005, India
| | - Salvatore D. Lepore
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431-0991, United States
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17
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Webster S, Young PC, Barker G, Rosair GM, Lee AL. Dehydrative thiolation of allenols: indium vs gold catalysis. J Org Chem 2015; 80:1703-18. [PMID: 25522131 DOI: 10.1021/jo502648w] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Intermolecular additions of thiols to allenols via formal S(N)2' selectivity to produce functionalized dienes are described. Although this dehydrative reaction was initially developed using gold(I) catalysis, indium(III) proves to be a far superior catalyst in terms of selectivity and substrate scope.
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Affiliation(s)
- S Webster
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
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18
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Wu L, Huang H, Liang Y, Cheng P. Regio- and stereoselective synthesis of 2-amino-dienes via decarboxylative amination of 4-(ethoxycarbonyl)-2,3-allenols by TsNCO. J Org Chem 2014; 79:11264-9. [PMID: 25343441 DOI: 10.1021/jo502098b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A metal-free decarboxylative amination of 4-(ethoxycarbonyl)-2,3-allenols by TsNCO via base-induced aza-Michael addition/elimination has been developed. A variety of substituted N-tosyl 1,3-dien-2-yl amines were obtained in good yields and excellent regio- and stereoselectivity. Moreover, this transformation could be applied in preparation of 2-amino-trienes.
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Affiliation(s)
- Lijun Wu
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Hunan Normal University , Changsha, Hunan 410081, China
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19
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Tata RR, Hampton CS, Altenhofer EF, Topinka M, Ying W, Gao X, Harmata M. New Synthesis of α′‐Hydroxydienones. Chemistry 2014; 20:13547-50. [PMID: 25168703 DOI: 10.1002/chem.201404638] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Rama Rao Tata
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
| | - Carissa S. Hampton
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
| | - Erich F. Altenhofer
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
| | - Michael Topinka
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
| | - Weijiang Ying
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
| | - Xuefeng Gao
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
| | - Michael Harmata
- Department of Chemistry, University of Missouri‐Columbia, 601 S. College Ave., Columbia, MO 65211 (USA)
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20
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Dong W, Hu P, Hu J, Tong X. Lewis base-catalyzed divergent isomerizations of 5-hydroxyl-2,3-dienoate. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.10.059] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Sabbasani VR, Lee D. Nitration of silyl allenes to form functionalized nitroalkenes. Org Lett 2013; 15:3954-7. [PMID: 23875601 DOI: 10.1021/ol401735v] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An efficient nitration of silyl allenes with nitrogen dioxide radical, generated from NaNO2 and AcOH, to form α-nitro-α,β-unsaturated silyl oximes has been developed. A similar nitration could be achieved by using Fe(NO3)3·9H2O and FeCl3·6H2O, but different from the regioselective oxime formation, two regioisomeric chloride-trapped products were isolated with varying ratios depending on the steric bulk of the silyl group. A novel ring-closure reaction of α-nitro-α,β-unsaturated silyl oximes upon treating with TBAF to form isooxazolidinone derivatives was also developed.
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Affiliation(s)
- Venkata R Sabbasani
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, USA
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