1
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Laha JK, Gupta P, Hazra A. Sulfate radical anion-induced benzylic oxidation of N-(arylsulfonyl)benzylamines to N-arylsulfonylimines. Beilstein J Org Chem 2023; 19:771-777. [PMID: 37346499 PMCID: PMC10280053 DOI: 10.3762/bjoc.19.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/25/2023] [Indexed: 06/23/2023] Open
Abstract
A mild, operationally convenient, and practical method for the synthesis of synthetically useful N-arylsulfonylimines from N-(arylsulfonyl)benzylamines using K2S2O8 in the presence of pyridine as a base is reported herein. In addition, a "one-pot" tandem synthesis of pharmaceutically relevant N-heterocycles by the reaction of N-arylsulfonylimines, generated in situ with ortho-substituted anilines is also reported. The key features of the protocol include the use of a green oxidant, a short reaction time (30 min), chromatography-free isolation, scalability, and economical, delivering N-arylsulfonylimines in excellent yields of up to 96%. While the oxidation of N-aryl(benzyl)amines to N-arylimines using K2S2O8 is reported to be problematic, the oxidation of N-(arylsulfonyl)benzylamines to N-arylsulfonylimines using K2S2O8 has been achieved for the first time. The dual role of the sulfate radical anion (SO4·-), including hydrogen atom abstraction (HAT) and single electron transfer (SET), is proposed to be involved in the plausible reaction mechanism.
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Affiliation(s)
- Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Pankaj Gupta
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Amitava Hazra
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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2
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Lee S, Shin I. Reversed-Polarity Synthesis of N-Sulfonyl Ketimines with Imidoylsilanes and Diaryliodonium Salts via Palladium-Catalyzed Reactions. J Org Chem 2022; 87:6552-6561. [PMID: 35533361 DOI: 10.1021/acs.joc.2c00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Imines are important building blocks in organic chemistry. Iminines, aldimines and ketimines, have been traditionally synthesized by the condensation reaction of the corresponding carbonyl compound with an amine moiety. More recently, palladium-catalyzed synthesis of ketimines using imidoyl chlorides has been reported. As an alternative, we report the reversed-polarity synthesis of N-sulfonyl ketimines using an anion equivalent imidoylsilane as a new nucleophilic coupling partner in the presence of a palladium catalyst. To the best of our knowledge, this is the first report of the use of imidoylsilanes in transition-metal-catalyzed coupling reactions. Diaryliodonium salt as an electrophile, various aryl-aryl or heteroaryl-aryl N-sulfonyl ketimines were successfully prepared in up to 99% isolated yields.
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Affiliation(s)
- Seungmi Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
| | - Inji Shin
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
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3
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Lupidi G, Palmieri A, Petrini M. Enantioselective Catalyzed Synthesis of Amino Derivatives Using Electrophilic Open‐Chain
N
‐Activated Ketimines. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100292] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gabriele Lupidi
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
| | - Alessandro Palmieri
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
| | - Marino Petrini
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
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4
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Li Z, Zhang L, Pu M, Lei M. Mechanistic Understanding of Base‐Catalyzed Aldimine/Ketoamine Condensations: An Old Story and A New Model. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000700] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhe‐wei Li
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 P. R. China
| | - Lin Zhang
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 P. R. China
| | - Min Pu
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 P. R. China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 P. R. China
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5
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Methyltrioxorhenium/urea hydrogen peroxide catalyzed oxidation of N-sulfinyl imines: A mild and highly efficient access to N-sulfonyl aldimines, ketimines and α-ketiminoesters. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Wu XY, Gui HZ, Jangra H, Wei Y, Zipse H, Shi M. Phosphine-catalyzed [3 + 2] annulation of 2-aminoacrylates with allenoates and mechanistic studies. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00092b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A phosphine catalyzed formal [3 + 2] annulation was disclosed, affording 3-pyrrolines containing an amino quaternary stereogenic center in good to excellent yields. The catalytic mechanism was investigated by DFT and kinetic studies.
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Affiliation(s)
- Xiao-Yun Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- 200237 Shanghai
- China
| | - Hou-Ze Gui
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- 200237 Shanghai
- China
| | - Harish Jangra
- Department Chemie
- Ludwig-Maximilians-Universität München
- 81377 München
- Germany
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
| | - Hendrik Zipse
- Department Chemie
- Ludwig-Maximilians-Universität München
- 81377 München
- Germany
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- 200237 Shanghai
- China
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7
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Ojha S, Panda N. Palladium‐Catalyzed
ortho
‐Benzoylation of Sulfonamides through C−H Activation: Expedient Synthesis of Cyclic
N
‐Sulfonyl Ketimines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900989] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Subhadra Ojha
- Department of Chemistry National Institute of Technology Rourkela Odisha 769008 India
| | - Niranjan Panda
- Department of Chemistry National Institute of Technology Rourkela Odisha 769008 India
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8
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Zhang C, Yang J, Zhou W, Tan Q, Yang Z, He L, Zhang M. Enantioselective Mannich Reaction of Glycine Iminoesters with N-Phosphinoyl Imines: A Bifunctional Approach. Org Lett 2019; 21:8620-8624. [DOI: 10.1021/acs.orglett.9b03223] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Changhui Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Jiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Wenqiang Zhou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Qiuyuan Tan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Zhao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
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9
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Hernández‐Guerra D, Hlavačková A, Pramthaisong C, Vespoli I, Pohl R, Slanina T, Jahn U. Photochemical C−H Amination of Ethers and Geminal Difunctionalization Reactions in One Pot. Angew Chem Int Ed Engl 2019; 58:12440-12445. [DOI: 10.1002/anie.201905209] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/18/2019] [Indexed: 01/19/2023]
Affiliation(s)
- Daniel Hernández‐Guerra
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Anna Hlavačková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Chiranan Pramthaisong
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Ilaria Vespoli
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Tomáš Slanina
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
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10
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Hernández‐Guerra D, Hlavačková A, Pramthaisong C, Vespoli I, Pohl R, Slanina T, Jahn U. Photochemical C−H Amination of Ethers and Geminal Difunctionalization Reactions in One Pot. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905209] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Daniel Hernández‐Guerra
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Anna Hlavačková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Chiranan Pramthaisong
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Ilaria Vespoli
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Tomáš Slanina
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
| | - Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo námĕstí 2 16610 Prague 6 Czech Republic
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11
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Zhong D, Wu D, Zhang Y, Lu Z, Usman M, Liu W, Lu X, Liu WB. Synthesis of Sultams and Cyclic N-Sulfonyl Ketimines via Iron-Catalyzed Intramolecular Aliphatic C-H Amidation. Org Lett 2019; 21:5808-5812. [PMID: 31298868 DOI: 10.1021/acs.orglett.9b01732] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclic sulfonamides (sultams) play a unique role in drug discovery and synthetic chemistry. A direct synthesis of sultams by an intramolecular C(sp3)-H amidation reaction using an iron complex in situ derived from Fe(ClO4)2 and aminopyridine ligand is reported. This strategy features a readily available catalyst and tolerates a broad variety of substrates as demonstrated by 22 examples (up to 89% yield). A one-pot iron-catalyzed amidation/oxidation procedure for the synthesis of cyclic N-sulfonyl ketimines is also realized with up to 92% yield (eight examples). The synthetic utility of the method is validated by a gram-scale reaction and derivatization of the products to ring-fused sultams.
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Affiliation(s)
- Dayou Zhong
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Di Wu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Yan Zhang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Zhiwu Lu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Muhammad Usman
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Wei Liu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Xiuqiang Lu
- Fuqing Branch of Fujian Normal University , Fuzhou 350300 , Fujian , China
| | - Wen-Bo Liu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China.,Sauvage Center for Molecular Sciences , Wuhan University , Wuhan 430072 , Hubei , China
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12
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Li ZY, Chaminda Lakmal HH, Cui X. Enabling Catalytic Arene C–H Amidomethylation via Bis(tosylamido)methane as a Sustainable Formaldimine Releaser. Org Lett 2019; 21:3735-3740. [DOI: 10.1021/acs.orglett.9b01183] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong-Yuan Li
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | | | - Xin Cui
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
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13
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Sharma VB, Jain SL, Sain B. Ruthenium Catalysed Imidation of Aldehydes Using PhI=NTs as Imido Transfer Reagent. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/0308234054213744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The [N-(p-tolylsulfonyl)imino] phenyliodinane (PhI=NTs) was found to be an efficient reagent for imidation of variety of aldehydes using [RuCl2(PPh3)3] as catalyst in the presence of triphenylphosphine.
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Affiliation(s)
- Vishal B. Sharma
- Chemical and Biosciences Division, Indian Institute of Petroleum, Dehradun-248005 India
| | - Suman L. Jain
- Chemical and Biosciences Division, Indian Institute of Petroleum, Dehradun-248005 India
| | - Bir Sain
- Chemical and Biosciences Division, Indian Institute of Petroleum, Dehradun-248005 India
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14
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Hasdemir B, Yaşa H, Akkamış Y. Synthesis and antioxidant activities of novel N
-aryl (and N
-alkyl) γ- and δ-imino esters and ketimines. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201800126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Belma Hasdemir
- Department of Chemistry, Faculty of Engineering; Istanbul University-Cerrahpaşa; Istanbul Turkey
| | - Hasniye Yaşa
- Department of Chemistry, Faculty of Engineering; Istanbul University-Cerrahpaşa; Istanbul Turkey
| | - Yağmur Akkamış
- Istanbul University-Cerrahpaşa, Science Institute; Chemistry Department; Istanbul Turkey
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15
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Marcantoni E, Palmieri A, Petrini M. Recent synthetic applications of α-amido sulfones as precursors of N-acylimino derivatives. Org Chem Front 2019. [DOI: 10.1039/c9qo00196d] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
α-Amido sulfones can be directly used as N-acylimine or N-acyliminium ion precursors in several synthetic processes aimed at the preparation of nitrogen containing compounds. This review collects the most relevant and practical utilizations of α-amido sulfones appeared in the literature after 2005.
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Affiliation(s)
- Enrico Marcantoni
- School of Science and Technology
- Chemistry Division
- University of Camerino
- 1 I-62032 Camerino
- Italy
| | - Alessandro Palmieri
- School of Science and Technology
- Chemistry Division
- University of Camerino
- 1 I-62032 Camerino
- Italy
| | - Marino Petrini
- School of Science and Technology
- Chemistry Division
- University of Camerino
- 1 I-62032 Camerino
- Italy
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16
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Mason JD, Weinreb SM. The Alstoscholarisine Alkaloids: Isolation, Structure Determination, Biogenesis, Biological Evaluation, and Synthesis. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2018; 81:115-150. [PMID: 30685049 DOI: 10.1016/bs.alkal.2018.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The alstoscholarisines are a small family of biologically and structurally interesting polycyclic monoterpenoid indole alkaloids isolated from the leaf extracts of Alstonia scholaris. The alkaloids can be divided into three different subtypes based upon their structures and putative biogenesis: (1) (-)-alstoscholarisines A-E, (2) (+)-alstoscholarisine G, and (3) (+)-alstoscholarisines H-J. This review discusses the isolation, structure determination, biological activity, and proposed biosynthesis of these metabolites. In addition, synthetic studies on the alkaloids are described including total syntheses of racemic alstoscholarisines A-E, a total synthesis of (-)-alstoscholarisine A, and a synthesis of racemic alstoscholarisine H.
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Affiliation(s)
- Jeremy D Mason
- Department of Chemistry, The Pennsylvania State University, University Park, PA, United States
| | - Steven M Weinreb
- Department of Chemistry, The Pennsylvania State University, University Park, PA, United States.
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17
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Sasaki M, Hamzik PJ, Ikemoto H, Bartko SG, Danheiser RL. Formal Bimolecular [2 + 2 + 2] Cycloaddition Strategy for the Synthesis of Pyridines: Intramolecular Propargylic Ene Reaction/Aza Diels-Alder Reaction Cascades. Org Lett 2018; 20:6244-6249. [PMID: 30247929 DOI: 10.1021/acs.orglett.8b02728] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two methods for the synthesis of multisubstituted pyridines are described. In each strategy, a highly reactive vinylallene is generated via an intramolecular propargylic ene reaction in the presence of an azadienophile. Reactions employing ethyl N-(tosyl)iminoacetate furnish an intermediate that undergoes elimination and isomerization upon the addition of DBU. The reaction of the intermediate vinylallene with TsCN leads to the isolation of a 2-sulfonylpyridine that serves as a versatile intermediate undergoing substitution reactions with oxygen and carbon nucleophiles.
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Affiliation(s)
- Michiko Sasaki
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Philip J Hamzik
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Hidaka Ikemoto
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Samuel G Bartko
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Rick L Danheiser
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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18
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Mason JD, Weinreb SM. Synthesis of Alstoscholarisines A-E, Monoterpene Indole Alkaloids with Modulating Effects on Neural Stem Cells. J Org Chem 2018; 83:5877-5896. [PMID: 29733650 DOI: 10.1021/acs.joc.8b00889] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A divergent synthetic strategy has been developed for stereoselective total syntheses of alstoscholarisines A-E, monoterpenoid indole alkaloids which are modulators of adult neuronal stem cells. A pivotal step includes an intermolecular Michael addition of an indole-2-acetic acid methyl ester enolate to an α,β-unsaturated N-sulfonyllactam to form the C15, C16 bond of the alkaloids. Other features of the strategy involve a selective partial reduction of an intermediate N-sulfonyllactam followed by cyclization to a bridged aminal system that serves as a key precursor for all five of the alkaloids as well as the use of an allyl group as a masked aldehyde equivalent.
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Affiliation(s)
- Jeremy D Mason
- Department of Chemistry , The Pennsylvania State University University Park , Pennsylvania 16802 , United States
| | - Steven M Weinreb
- Department of Chemistry , The Pennsylvania State University University Park , Pennsylvania 16802 , United States
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19
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Iwanejko J, Wojaczyńska E. Cyclic imines – preparation and application in synthesis. Org Biomol Chem 2018; 16:7296-7314. [DOI: 10.1039/c8ob01874j] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cyclic imines, available from various nitrogen-containing reactants, serve as versatile synthetic intermediates for biologically active compounds.
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Affiliation(s)
- Jakub Iwanejko
- Department of Organic Chemistry
- Wrocław University of Science and Technology
- 50 370 Wrocław
- Poland
| | - Elżbieta Wojaczyńska
- Department of Organic Chemistry
- Wrocław University of Science and Technology
- 50 370 Wrocław
- Poland
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20
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Hamzik PJ, Goutierre AS, Sakai T, Danheiser RL. Aza Diels–Alder Reactions of Nitriles, N,N-Dimethylhydrazones, and Oximino Ethers. Application in Formal [2 + 2 + 2] Cycloadditions for the Synthesis of Pyridines. J Org Chem 2017; 82:12975-12991. [DOI: 10.1021/acs.joc.7b02503] [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)
- Philip J. Hamzik
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Anne-Sophie Goutierre
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Takeo Sakai
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Rick L. Danheiser
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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21
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Maraswami M, Chen G, Loh TP. Iridium(III)-Catalyzed Selective and Mild C-H Amidation of Cyclic N
-Sulfonyl Ketimines with Organic Azides. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700785] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Manikantha Maraswami
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
| | - Gang Chen
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
| | - Teck-Peng Loh
- Institute of Advanced Synthesis; College of Chemistry and Molecular Engineering; Jiangsu National Synergetic Innovation Center for Advanced Materials; Nanjing Tech University; Nanjing, Jiangsu People's Republic of China 210009
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei People's Republic of China 230026
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22
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Zhou H, Chaminda Lakmal HH, Baine JM, Valle HU, Xu X, Cui X. Catalytic [2 + 2 + 2] cycloaddition with indium(iii)-activated formaldimines: a practical and selective access to hexahydropyrimidines and 1,3-diamines from alkenes. Chem Sci 2017; 8:6520-6524. [PMID: 28989677 PMCID: PMC5628582 DOI: 10.1039/c7sc02576a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 07/20/2017] [Indexed: 02/02/2023] Open
Abstract
Catalytic [2 + 2 + 2] cycloaddition with three double bond systems has been developed for construction of hexahydropyrimidine and 1,3-diamine derivatives.
Catalytic [2 + 2 + 2] cycloaddition with imines has, for the first time, been developed as a practical and selective approach for direct construction of hexahydropyrimidine derivatives from various alkenes. With formaldimines as reagents and simple InCl3 as the catalyst, this ionic [2 + 2 + 2] approach is applicable for a wide scope of alkenes and allenes with various electronic and steric properties, as well as substitution patterns. Through facile hydrolysis of the resulting hexahydropyrimidines, this catalytic process also provides a new synthetic strategy for the aminomethylamination of alkenes and allenes to practically access 1,3-diamine derivatives.
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Affiliation(s)
- Hui Zhou
- Department of Chemistry , Mississippi State University , Mississippi State , MS 39762 , USA .
| | | | - Jonathan M Baine
- Department of Chemistry , Mississippi State University , Mississippi State , MS 39762 , USA .
| | - Henry U Valle
- Department of Chemistry , Mississippi State University , Mississippi State , MS 39762 , USA .
| | - Xue Xu
- Department of Chemistry , Mississippi State University , Mississippi State , MS 39762 , USA .
| | - Xin Cui
- Department of Chemistry , Mississippi State University , Mississippi State , MS 39762 , USA .
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23
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Laha JK, Jethava KP. Access to Imidazolidine-Fused Sulfamidates and Sulfamides Bearing a Quaternary Center via 1,3-Dipolar Cycloaddition of Nonstabilized Azomethine Ylides. J Org Chem 2017; 82:3597-3604. [DOI: 10.1021/acs.joc.7b00116] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology
(Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Krupal P. Jethava
- Department of Pharmaceutical Technology
(Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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24
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Marcantoni E, Petrini M. Recent Developments in the Stereoselective Synthesis of Nitrogen-Containing Heterocycles usingN-Acylimines as Reactive Substrates. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600644] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Enrico Marcantoni
- School of Science and Technology; Chemistry Division; Università di Camerino; via S. Agostino 1 62032 Camerino Italy
| | - Marino Petrini
- School of Science and Technology; Chemistry Division; Università di Camerino; via S. Agostino 1 62032 Camerino Italy
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25
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Huang D, Wang X, Wang X, Chen W, Wang X, Hu Y. Synthesis of N-Sulfonyl Arylaldimines Developed by Retesting an Old Process. Org Lett 2016; 18:604-7. [DOI: 10.1021/acs.orglett.5b03686] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Dayun Huang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xuesong Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xingyong Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Wenwen Chen
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xinyan Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yuefei Hu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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26
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Saito T, Kobayashi S, Otani T, Kutsumura N. Development of Synthetic Methodologies for Heterocycles Using Diene-transmissive Hetero-Diels-Alder Reaction. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takao Saito
- Department of Chemistry, Faculty of Science, Tokyo University of Science
| | | | - Takashi Otani
- Course of Chemical Engineering, National Institute of Technology, Anan College
| | - Noriki Kutsumura
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba
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27
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Kale A, Chennapuram M, Bingi C, Nanubolu JB, Atmakur K. One pot oxidative N–S bond formation to access 2-sulfenylimine chromenes. Org Biomol Chem 2016; 14:582-589. [DOI: 10.1039/c5ob01790d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Synthesis of 2-sulfenylimine chromene compounds is accomplished in a one-pot, catalyst-free, five-component reaction in toluene. When aniline was employed as nucleophile formation of hexahydrobenzofuran-2-N-phenyl carboxamide was observed. Excellent yields, simple reaction conditions high compatibility are the advantages of this protocol.
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Affiliation(s)
- Ashok Kale
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Madhu Chennapuram
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Chiranjeevi Bingi
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Jagadeesh Babu Nanubolu
- Laboratory of X-ray crystallography
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Krishnaiah Atmakur
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- AcSIR-Indian Institute of Chemical Technology
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28
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Direct enantioselective amination of α-ketoester catalyzed by tertiary amine thiourea: a new approach to chiral α-hydroxy-β-amino acid. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.061] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Reeves JT, Visco MD, Marsini MA, Grinberg N, Busacca CA, Mattson AE, Senanayake CH. A General Method for Imine Formation Using B(OCH2CF3)3. Org Lett 2015; 17:2442-5. [DOI: 10.1021/acs.orglett.5b00949] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan T. Reeves
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Michael D. Visco
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Maurice A. Marsini
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Nelu Grinberg
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Carl A. Busacca
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Anita E. Mattson
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Chris H. Senanayake
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road/P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
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30
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Mei ST, Wang NJ, Ouyang Q, Wei Y. Rhodium-catalysed direct C–H allylation of N-sulfonyl ketimines with allyl carbonates. Chem Commun (Camb) 2015; 51:2980-3. [DOI: 10.1039/c4cc09899d] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Synthetically useful N-sulfonyl ketimines were efficiently allylated with various allyl carbonates through rhodium catalysis.
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Affiliation(s)
- Shu-Tao Mei
- College of Pharmacy
- Third Military Medical University
- Chongqing 400038
- China
| | - Nan-Jin Wang
- College of Pharmacy
- Third Military Medical University
- Chongqing 400038
- China
| | - Qin Ouyang
- College of Pharmacy
- Third Military Medical University
- Chongqing 400038
- China
| | - Ye Wei
- College of Pharmacy
- Third Military Medical University
- Chongqing 400038
- China
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31
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Boyer A. Rhodium(II)-Catalyzed Stereocontrolled Synthesis of 2-Tetrasubstituted Saturated Heterocycles from 1-Sulfonyl-1,2,3-triazoles. Org Lett 2014; 16:5878-81. [DOI: 10.1021/ol5028267] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alistair Boyer
- School of Chemistry, University of Glasgow, Joseph Black
Building, University Avenue, Glasgow G12 8QQ, U.K
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32
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Wang NJ, Mei ST, Shuai L, Yuan Y, Wei Y. Aerobic Oxidative C–H Olefination of Cyclic N-Sulfonyl Ketimines Catalyzed by a Rhodium Catalyst. Org Lett 2014; 16:3040-3. [DOI: 10.1021/ol501152a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Nan-Jin Wang
- College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Shu-Tao Mei
- College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Li Shuai
- College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Yi Yuan
- College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Ye Wei
- College of Pharmacy, Third Military Medical University, Chongqing 400038, China
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33
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Gopi E, Namboothiri INN. Synthesis of α-tribromomethylamines via Mg-mediated addition of bromoform to imines. Org Biomol Chem 2014; 12:2769-77. [PMID: 24668340 DOI: 10.1039/c4ob00259h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mg-mediated addition of bromoform to electron deficient imines such as N-sulfonylimines affords α-tribromomethylated N-sulfonylamines in good to excellent yields. The procedure could be further simplified by transforming the imine precursors, α-sulfonyl-N-tosyl- and Boc-amines, in one pot to the corresponding α-tribromomethyl derivatives. Facile removal of the Boc protecting group in nearly quantitative yield and a silver carbonate mediated monodebromination have also been demonstrated.
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Affiliation(s)
- Elumalai Gopi
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India.
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34
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Fang LC, Hsung RP. Stereoselective synthesis of isoquinuclidines through an aza-[4 + 2] cycloaddition of chiral cyclic 2-amidodienes. Org Lett 2014; 16:1826-9. [PMID: 24621094 PMCID: PMC3969095 DOI: 10.1021/ol500390a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 11/29/2022]
Abstract
A highly stereoselective aza-[4 + 2] cycloaddition of chiral cyclic 2-amidodienes with N-sulfonyl aldimines is described. While this Lewis acid promoted heterocycloaddition provides an efficient strategy for constructing optically enriched isoquinuclidines, it is mechanistically intriguing. The cycloaddition favored the endo-II pathway in the absence of a viable bidentate coordination. This represents an unexpected switch from the anticipated endo-I selectivity obtained in the all-carbon cycloaddition.
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Affiliation(s)
- Li-Chao Fang
- Division
of Pharmaceutical
Sciences, School of Pharmacy, University
of Wisconsin, Madison, Wisconsin 53705, United States
| | - Richard P. Hsung
- Division
of Pharmaceutical
Sciences, School of Pharmacy, University
of Wisconsin, Madison, Wisconsin 53705, United States
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35
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Boyer A. Rhodium(II)-Catalyzed Stereocontrolled Synthesis of Dihydrofuran-3-imines from 1-Tosyl-1,2,3-triazoles. Org Lett 2014; 16:1660-3. [DOI: 10.1021/ol500309x] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Alistair Boyer
- School of Chemistry, University of Glasgow, Joseph Black
Building, University Avenue, Glasgow G12 8QQ, U.K
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36
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Morales S, Guijarro FG, García Ruano JL, Cid MB. A General Aminocatalytic Method for the Synthesis of Aldimines. J Am Chem Soc 2014; 136:1082-9. [DOI: 10.1021/ja4111418] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Sara Morales
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - Fernando G. Guijarro
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - José Luis García Ruano
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - M. Belén Cid
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
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37
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38
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Kobayashi S, Kudo K, Ito A, Hirama S, Otani T, Saito T. The diene-transmissive hetero-Diels–Alder reaction of 2-vinyl α,β-unsaturated aldimines: stereoselective synthesis of hexahydroquinazolin-2-ones. Org Biomol Chem 2014; 12:4061-4. [DOI: 10.1039/c4ob00224e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tandem Diels–Alder methodology of cross-conjugated 1-azatrienes for synthesis of crossed bis-cycloadducts with high chemo-, regio- and stereoselectivities is described.
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Affiliation(s)
- Satoru Kobayashi
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Kenji Kudo
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Ai Ito
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Satoru Hirama
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Takashi Otani
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Takao Saito
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
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39
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Abstract
Saraines have been isolated by the group of Cimino from the marine sponge Reniera sarai collected in the Bay of Naples. These alkaloids can be classified into two categories, depending on the type of their structure. Saraines 1-3 and isosaraines 1-3 are characterized by a trans-2-oxoquinolizidine moiety bound directly to a tetrahydropyridine ring, both nuclei being also linked by two alkyl chains of different lengths. On the other hand, saraines A-C and misenine present a diazatricyclic central core, showing an unusual interaction between an aldehyde and a tertiary amine and giving them a zwitterionic character, and flanked with two chains forming macrocycles. In a first part of the chapter, the isolation, spectral data, and structure elucidation of saraines are presented. Biological properties and biogenetic proposals concerning these compounds are then described. The most important part is devoted to synthetic approaches and total synthesis of saraine A.
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40
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Stanton GR, Göllü M, Platoff RM, Rich CE, Carroll PJ, Walsh PJ. Synthesis of ChiralN-Sulfonyl andN-Phosphinoyl α-Halo Aldimine Precursors. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200864] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Maleev VI, Skrupskaya TV, Yashkina LV, Mkrtchyan AF, Saghyan AS, Il’in MM, Chusov DA. Aza-Diels–Alder reaction catalyzed by novel chiral metalocomplex Brønsted acids. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Zhang W, Zhu Y, Wei D, Li Y, Tang M. Theoretical investigations toward the [4 + 2] cycloaddition of ketenes with N-benzoyldiazenes catalyzed by N-heterocyclic carbenes: mechanism and enantioselectivity. J Org Chem 2012; 77:10729-37. [PMID: 23153290 DOI: 10.1021/jo302044n] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Density functional theory (DFT) calculations have been performed to provide the first detailed computational study on the mechanism and enantioselectivity for the [4 + 2] cycloaddition reaction of ketenes with N-benzoyldiazenes catalyzed by N-heterocyclic carbenes (NHCs). Two possible mechanisms have been studied: first is the "ketene-first" mechanism (mechanism A), and second is the novel "diazene-first" mechanism (mechanism B). The calculated results reveal that mechanism B is more favorable than mechanism A because it is not only of lower energy barrier but also more consistent with the provided general experimental procedure (Huang, X.-L.; He, L.; Shao, P.-L.; Ye, S. Angew. Chem., Int. Ed.2009, 48, 192-195). The enantioselectivity-determining step is demonstrated to present during the first process of cycloaddition, and the main product configuration is verified to agree with the experimental ee values very well. This study should be of some worth on forecasting how different substituent groups of catalysts and/or reactants affect the enantioselectivity of products. The obtained novel mechanistic insights should be valuable for not only rational design of more efficient NHC catalysts but also understanding the general reaction mechanism of [4 + 2] cycloaddition of ketenes.
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Affiliation(s)
- Wenjing Zhang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P. R. China
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43
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Miller EJ, Zhao W, Herr JD, Radosevich AT. A Nonmetal Approach to α-Heterofunctionalized Carbonyl Derivatives by Formal Reductive XH Insertion. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205604] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Miller EJ, Zhao W, Herr JD, Radosevich AT. A Nonmetal Approach to α-Heterofunctionalized Carbonyl Derivatives by Formal Reductive XH Insertion. Angew Chem Int Ed Engl 2012; 51:10605-9. [DOI: 10.1002/anie.201205604] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Indexed: 11/10/2022]
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45
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Chen XY, Ye S. Phosphane-Catalyzed [4+2] Annulation of Allenoates with Ketimines: Synthesis of Sultam-Fused Tetrahydropyridines. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200747] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Cannon JS, Overman LE. Is there no end to the total syntheses of strychnine? Lessons learned in strategy and tactics in total synthesis. Angew Chem Int Ed Engl 2012; 51:4288-311. [PMID: 22431197 PMCID: PMC3804246 DOI: 10.1002/anie.201107385] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 11/22/2011] [Indexed: 12/19/2022]
Abstract
From the 19th century to the present, the complex indole alkaloid strychnine has engaged the chemical community. In this Review, we examine why strychnine has been and remains today an important target for directed synthesis efforts. A selection of the diverse syntheses of strychnine is discussed with the aim of identifying their influence on the evolution of the strategy and tactics of organic synthesis.
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Affiliation(s)
- Jeffrey S. Cannon
- Department of Chemistry University of California, Irvine 1102 Natural Sciences II, Irvine, California 92697-2025 (USA)
| | - Larry E. Overman
- Department of Chemistry University of California, Irvine 1102 Natural Sciences II, Irvine, California 92697-2025 (USA)
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47
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Cannon JS, Overman LE. Kein Ende für Totalsynthesen von Strychnin in Sicht? Lektionen für Strategien und Methoden in der Totalsynthese. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107385] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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48
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Qian Y, Jing C, Zhai C, Hu WH. A Novel Method for Synthesizing N-Alkoxycarbonyl Aryl α-Imino Esters and Their Applications in Enantioselective Transformations. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100615] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Chen XY, Lin RC, Ye S. Catalytic [2+2] and [3+2] cycloaddition reactions of allenoates with cyclic ketimines. Chem Commun (Camb) 2012; 48:1317-9. [DOI: 10.1039/c2cc16055b] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Gigant N, Dequirez G, Retailleau P, Gillaizeau I, Dauban P. Catalytic Selective Oxyamidation of Cyclic Enamides using Nitrenes. Chemistry 2011; 18:90-4. [DOI: 10.1002/chem.201102302] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Indexed: 11/09/2022]
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