1
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Huang Y, Peng X, Li T. Recent Advances in NHC-Catalyzed Chemoselective Activation of Carbonyl Compounds. Chem Asian J 2024; 19:e202400097. [PMID: 38451172 DOI: 10.1002/asia.202400097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/08/2024]
Abstract
N-Heterocyclic carbenes (NHCs) catalysts have been employed as effective tools in the development of various reactions, which have made notable contributions in developing diverse reaction modes and generating significant functionalized molecules. This review provides an overview of the recent advancements in the chemo- and regioselective activation of different aldehydes using NHCs, categorized into five parts based on the different activation modes. A brief conclusion and outlook is provided to stimulate the development of novel activation modes for accessing functional molecules.
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Affiliation(s)
- Yixian Huang
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Xiaolin Peng
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Tingting Li
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
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2
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Duan Z, Young CM, Zhu J, Slawin AMZ, O'Donoghue AC, Smith AD. Rate and equilibrium constants for the addition of triazolium salt derived N-heterocyclic carbenes to heteroaromatic aldehydes. Chem Sci 2022; 14:162-170. [PMID: 36605738 PMCID: PMC9769090 DOI: 10.1039/d2sc05704b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/13/2022] [Indexed: 11/16/2022] Open
Abstract
Heteroaromatic aldehydes are often used preferentially or exclusively in a range of NHC-catalysed processes that proceed through the generation of a reactive diaminoenol or Breslow Intermediate (BI), with the reason for their unique reactivity currently underexplored. This manuscript reports measurement of rate and equilibrium constants for the reaction between N-aryl triazolium NHCs and heteroaromatic aldehydes, providing insight into the effect of the NHC and heteroaromatic aldehyde structure up to formation of the BI. Variation in NHC catalyst and heteroaromatic aldehyde structure markedly affect the observed kinetic parameters of adduct formation, decay to starting materials and onward reaction to BI. In particular, large effects are observed with both 3-halogen (Br, F) and 3-methyl substituted pyridine-2-carboxaldehyde derivatives which substantially favour formation of the tetrahedral intermediate relative to benzaldehyde derivatives. Key observations indicate that increased steric hindrance leads to a reduction in both k 2 and k -1 for large (2,6-disubstituted)-N-Ar groups within the triazolium scaffold, and sterically demanding aldehyde substituents in the 3-position, but not in the 6-position of the pyridine-2-carboxaldehyde derivatives. As part of this study, the isolation and characterisation of twenty tetrahedral adducts formed upon addition of N-aryl triazolium derived NHCs into heteroaromatic aldehydes are described. These adducts are key intermediates in NHC-catalysed umpolung addition of heteroaromatic aldehydes and are BI precursors.
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Affiliation(s)
- Zhuan Duan
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews Fife KY16 9ST UK
| | - Claire M Young
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews Fife KY16 9ST UK
| | - Jiayun Zhu
- Department of Chemistry, Durham University South Road Durham DH1 3LE UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews Fife KY16 9ST UK
| | | | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews Fife KY16 9ST UK
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3
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Parmar K, Haghshenas P, Gravel M. Total Synthesis of (+)-Hyacinthacine A 1 Using a Chemoselective Cross-Benzoin Reaction and a Furan Photooxygenation-Amine Cyclization Strategy. Org Lett 2021; 23:1416-1421. [PMID: 33538602 DOI: 10.1021/acs.orglett.1c00090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report the shortest synthesis of glycosidase inhibitor (+)-hyacinthacine A1 using a highly chemoselective N-heterocyclic carbene-catalyzed cross-benzoin reaction as well as a furan photooxygenation-amine cyclization strategy. This is the first such cyclization on a furylic alcohol, an unprecedented reaction due to the notorious instability of the formed intermediates. The photooxygenation strategy was eventually incorporated into a three-step one-pot process that formed the requisite pyrrolizidine framework of (+)-hyacinthacine A1.
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Affiliation(s)
- Karnjit Parmar
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C9
| | - Pouyan Haghshenas
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C9
| | - Michel Gravel
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N 5C9
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4
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Dzieszkowski K, Barańska I, Mroczyńska K, Słotwiński M, Rafiński Z. Organocatalytic Name Reactions Enabled by NHCs. MATERIALS 2020; 13:ma13163574. [PMID: 32823580 PMCID: PMC7475904 DOI: 10.3390/ma13163574] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 12/20/2022]
Abstract
Giving reactions the names of their discoverers is an extraordinary tradition of organic chemistry. Nowadays, this phenomenon is much rarer, although already named historical reactions are still often developed. This is also true in the case of a broad branch of N-heterocyclic carbenes catalysis. NHCs allow many unique synthetic paths, including commonly known name reactions. This article aims to gather this extensive knowledge and compare historical reactions with current developed processes. Furthermore, this review is a great opportunity to highlight some of the unique applications of these procedures in the total synthesis of biologically active compounds. Hence, this concise article may also be a source of knowledge for scientists just starting their adventure with N-heterocyclic carbene chemistry.
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5
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Wang Y, Lan Y. Mechanism and origin of diastereoselectivity of N-heterocyclic carbene-catalyzed cross-benzoin reaction: A DFT study. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.08.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Duan A, Fell JS, Yu P, Lam CYH, Gravel M, Houk KN. Theoretical Study of Diastereoselective NHC-Catalyzed Cross-Benzoin Reactions between Furfural and N-Boc-Protected α-Amino Aldehydes. J Org Chem 2019; 84:13565-13571. [DOI: 10.1021/acs.joc.9b01821] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Abing Duan
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Jason S. Fell
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095-1569, United States
| | - Peiyuan Yu
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095-1569, United States
| | - Colin Yu-hong Lam
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095-1569, United States
| | - Michel Gravel
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095-1569, United States
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7
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Wang B, Wang XH, Huang W, Zhou J, Zhu HP, Peng C, Han B. Protecting Group-Directed Diastereodivergent Synthesis of Chiral Tetrahydronaphthalene-Fused Spirooxindoles via Bifunctional Tertiary Amine Catalysis. J Org Chem 2019; 84:10349-10361. [DOI: 10.1021/acs.joc.9b01501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Biao Wang
- Key Laboratory of Characteristic Chinese Resource in Southwest China, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xiao-Hui Wang
- Department of Pharmacy, Naval Authorities Clinic, Beijing 100841, China
| | - Wei Huang
- Key Laboratory of Characteristic Chinese Resource in Southwest China, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Jin Zhou
- Key Laboratory of Characteristic Chinese Resource in Southwest China, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Hong-Ping Zhu
- Key Laboratory of Characteristic Chinese Resource in Southwest China, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Cheng Peng
- Key Laboratory of Characteristic Chinese Resource in Southwest China, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Bo Han
- Key Laboratory of Characteristic Chinese Resource in Southwest China, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
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8
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Li Y, Zhang Z. Mechanisms and Stereoselectivities of NHC-Catalyzed [3 + 4] Cycloaddition Reaction between Isatin-Derived Enal and N-(ortho
-Chloromethyl)aryl Amide. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900087] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yan Li
- School of Chemical Engineering; University of Science and Technology Liaoning; 114051 Anshan P. R. China
| | - Zhiqiang Zhang
- School of Chemical Engineering; University of Science and Technology Liaoning; 114051 Anshan P. R. China
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9
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Wang Y, Wu QY, Lai TH, Zheng KJ, Qu LB, Wei D. Prediction on the origin of selectivities of NHC-catalyzed asymmetric dearomatization (CADA) reactions. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02238k] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The mechanism and origin of selectivities of NHC-catalyzed dearomatization reaction have been theoretically studied.
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Affiliation(s)
- Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Qiu-Yu Wu
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Tian-Hua Lai
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Kai-Jun Zheng
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
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10
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Wang Y, Qu L, Wei D. Prediction on the Origin of Selectivities in Base‐controlled Switchable NHC‐catalyzed Transformations. Chem Asian J 2018; 14:293-300. [DOI: 10.1002/asia.201801583] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 11/28/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Yang Wang
- Department of Material and Chemical EngineeringZhengzhou University of Light Industry 136 Science Avenue Zhengzhou Henan Province 450002 P. R. China
| | - Ling‐Bo Qu
- College of Chemistry and Molecular EngineeringZhengzhou University 100 Science Avenue Zhengzhou Henan Province 450002 P. R. China
| | - Donghui Wei
- College of Chemistry and Molecular EngineeringZhengzhou University 100 Science Avenue Zhengzhou Henan Province 450002 P. R. China
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11
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Yu L, Meng C, Wang J, Gao Z, Xie J. Substrate‐Controlled Diastereoselectivity Switch in the Formation of Dihydrothieno[3,4‐
c
]coumarins via [4+1] Annulations. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Li‐Si‐Han Yu
- Department of Chemistry and Life SciencesZhejiang Normal University 321004 Jinhua People's Republic of China
| | - Chang‐Yu Meng
- Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Department of Chemistry and Food ScienceYulin Normal University 537000 Yulin People's Republic of China
| | - Jing Wang
- Department of Chemistry and Life SciencesZhejiang Normal University 321004 Jinhua People's Republic of China
| | - Zhi‐Jian Gao
- Department of Chemistry and Life SciencesZhejiang Normal University 321004 Jinhua People's Republic of China
| | - Jian‐Wu Xie
- Department of Chemistry and Life SciencesZhejiang Normal University 321004 Jinhua People's Republic of China
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12
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Aluminum Complexes Based on Tridentate Amidoalkoxide NNO-Ligands: Synthesis, Structure, and Properties. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Abstract
Oxazolium salts were successfully employed for the first time as organocatalysts for benzoin, Stetter, and redox esterification reactions. An N-mesityl oxazolium salt catalyzed homobenzoin reaction of aromatic, heteroaromatic, and aliphatic aldehydes delivered α-hydroxy ketones in high yields. This new type of catalyst proved remarkably effective for the Stetter reaction of challenging substrates such as β-alkyl-α,β-unsaturated ketones and electron-rich aromatic aldehydes in comparison to common thiazolium and triazolium salts.
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Affiliation(s)
| | - Michel Gravel
- Department of Chemistry , University of Saskatchewan , Saskatoon , SK Canada , S7N 5C9
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14
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Li X, Tang M, Wang Y, Wang Y, Li Z, Qu LB, Wei D. Insights into the N-Heterocyclic Carbene (NHC)-Catalyzed Intramolecular Cyclization of Aldimines: General Mechanism and Role of Catalyst. Chem Asian J 2018; 13:1710-1718. [PMID: 29667337 DOI: 10.1002/asia.201800313] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/02/2018] [Indexed: 12/14/2022]
Abstract
One of the most challenging questions in the Lewis base organocatalyst field is how to predict the most electrophilic carbon for the complexation of N-heterocyclic carbene (NHC) and reactant. This study provides a valuable case for this issue. Multiple mechanisms (A, B, C, D, and E) for the intramolecular cyclization of aldimine catalyzed by NHC were investigated by using density functional theory (DFT). The computed results reveal that the NHC energetically prefers attacking the iminyl carbon (AIC mode, which is associated with mechanisms A and C) rather than attacking the olefin carbon (AOC mode, which is associated with mechanisms B and D) or attacking the carbonyl carbon (ACC mode, which is associated with mechanism E) of aldimine. The calculated results based on the different reaction models indicate that mechanism A (AIC mode), which is associated with the formation of the aza-Breslow intermediate, is the most favorable pathway. For mechanism A, there are five steps: (1) nucleophilic addition of NHC to the iminyl carbon of aldimine; (2) [1,2]-proton transfer to form an aza-Breslow intermediate; (3) intramolecular cyclization; (4) the other [1,2]-proton transfer; and (5) regeneration of NHC. The analyses of reactivity indexes have been applied to explain the chemoselectivity, and the general principles regarding the possible mechanisms would be useful for the rational design of NHC-catalyzed chemoselective reactions.
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Affiliation(s)
- Xue Li
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Mingsheng Tang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Yanyan Wang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Yang Wang
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, No. 100 Kexue Street, Zhengzhou, Henan, 450002, P. R. China
| | - Zhongjun Li
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Ling-Bo Qu
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
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15
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Abstract
This review covers diastereo- and enantiodivergent catalyzed reactions in acyclic and cyclic systems using metal complexes or organocatalysts. Among them, nucleophilic addition to carbon-carbon and carbon-nitrogen double bonds, α-functionalization of carbonyl compounds, allylic substitutions, and ring opening of oxiranes and aziridines are considered. The diastereodivergent synthesis of alkenes from alkynes is also included. Finally, stereodivergent intramolecular and intermolecular cycloadditions and other cyclizations are also reported.
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Affiliation(s)
- Irina P Beletskaya
- Chemistry Department , M. V. Lomonosov Moscow State University , Leninskie Gory 1 , 119992 Moscow , Russia
| | - Carmen Nájera
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , E-03080 Alicante , Spain
| | - Miguel Yus
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , E-03080 Alicante , Spain
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16
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Veeraswamy V, Goswami G, Mukherjee S, Ghosh K, Saha ML, Sengupta A, Ghorai MK. Memory of Chirality Concept in Asymmetric Intermolecular Michael Addition of α-Amino Ester Enolates to Enones and Nitroalkenes. J Org Chem 2018; 83:1106-1115. [PMID: 29272115 DOI: 10.1021/acs.joc.7b02315] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly stereoselective asymmetric intermolecular conjugate addition of α-amino ester derivatives to cyclic enones via the memory of chirality (MOC) concept in high yields with excellent diastereo- and enantioselectivity (dr >99:1, up to 99% ee) is reported. The applicability and the generality of the strategy was demonstrated by its further exploration to acyclic α,β-unsaturated ketone and aromatic nitroalkenes, resulting in the formation of δ-keto-α-amino ester derivative and γ-nitro-α-amino ester derivatives, respectively, with excellent ee and dr.
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Affiliation(s)
| | - Gaurav Goswami
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | | | - Koena Ghosh
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Manik Lal Saha
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Arunava Sengupta
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Manas K Ghorai
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
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17
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Li XS, Zhao LL, Wang XK, Cao L, Shi XQ, Zhang R, Qi J. Enantioselective [3 + 2] Annulation of Enals with 2-Aminoacrylates Catalyzed by N-Heterocyclic Carbene. Org Lett 2017; 19:3943-3946. [DOI: 10.1021/acs.orglett.7b01860] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xing-Shuo Li
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Liang-Liang Zhao
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Xiao-Ke Wang
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Li−Li Cao
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Xiao-Qian Shi
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Rui Zhang
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
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18
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Zamani F, Pyne SG, Hyland CJT. Oxazolidinones and 2,5-Dihydrofurans via Zinc-Catalyzed Regioselective Allenylation Reactions of l-α-Amino Aldehydes. J Org Chem 2017; 82:6819-6830. [PMID: 28557457 DOI: 10.1021/acs.joc.7b00969] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The simultaneous control of diastereoselectivity and regioselectivity in Zn-catalyzed allenylation reactions of N-protected l-α-amino aldehydes is reported. A reversal in diastereoselectivity could be realized by variation of the α-amino aldehyde protecting groups. A range of 1-allenyl-2-amino alcohols were obtained with excellent regioselectivity and converted to oxazolidinones and dihydrofurans. Many of which could be isolated as single diastereoisomers and without significant erosion of ee, making this a practical catalytic synthesis of highly functionalized heterocycles.
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Affiliation(s)
- Farzad Zamani
- School of Chemistry, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - Stephen G Pyne
- School of Chemistry, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - Christopher J T Hyland
- School of Chemistry, University of Wollongong , Wollongong, New South Wales 2522, Australia
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19
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Asymmetric cross-benzoin condensation promoted by a chiral triazolium precatalyst bearing a pyridine moiety. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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20
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Zhao LL, Li XS, Cao LL, Zhang R, Shi XQ, Qi J. Access to dihydropyridinones and spirooxindoles: application of N-heterocyclic carbene-catalyzed [3+3] annulation of enals and oxindole-derived enals with 2-aminoacrylates. Chem Commun (Camb) 2017; 53:5985-5988. [DOI: 10.1039/c7cc02753b] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A strategy for the NHC-catalyzed synthesis of dihydropyridinones and spirooxindoles has been developed via [3+3] annulation reactions of enals or isatin-derived enals with 2-aminoacrylates under oxidative conditions.
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Affiliation(s)
- Liang-Liang Zhao
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Xing-Shuo Li
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Li-Li Cao
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Rui Zhang
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Xiao-Qian Shi
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
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21
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Gaggero N, Pandini S. Advances in chemoselective intermolecular cross-benzoin-type condensation reactions. Org Biomol Chem 2017; 15:6867-6887. [DOI: 10.1039/c7ob01662j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An exhaustive and critical overview of synthetically relevant methods for intermolecular cross-acyloin condensation reactions is reported.
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Affiliation(s)
- Nicoletta Gaggero
- Dipartimento di Scienze Farmaceutiche
- Sezione di Chimica Generale e Organica “A. Marchesini”
- Università degli Studi di Milano
- 20133-Milano
- Italia
| | - Stefano Pandini
- Dipartimento di Scienze Farmaceutiche
- Sezione di Chimica Generale e Organica “A. Marchesini”
- Università degli Studi di Milano
- 20133-Milano
- Italia
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