1
|
Park Y, Ryu JS. Sulfamidate-Based Stereoselective Total Synthesis of (+)-Preussin Using Gold(I)-Catalyzed Intramolecular Dehydrative Amination: Dead End and Detour. J Org Chem 2023. [PMID: 37392432 DOI: 10.1021/acs.joc.3c00670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2023]
Abstract
A sulfamidate-based stereoselective total synthesis of (+)-preussin has been developed. The key step involves a gold(I)-catalyzed intramolecular dehydrative amination of sulfamate esters tethered to allylic alcohols, which allows for the construction of the cyclic sulfamidate with high stereoselectivity. Further manipulation to highly constrained bicyclic sulfamidate and the following ring-opening process afford 3-hydroxypyrrolidine motif stereoselectively. The energy of the constrained bicyclic ring system is relieved by the subsequent ring-opening process, which leads to a stereoselective formation of the 3-hydroxypyrrolidine motif under mild reaction conditions. The success of this approach not only provides a new method for the total synthesis of enantiomerically pure (+)-preussin but also highlights the synthetic utility of sulfamidates in constructing valuable natural product architectures.
Collapse
Affiliation(s)
- Yunjeong Park
- College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Jae-Sang Ryu
- College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| |
Collapse
|
2
|
Effects and Mechanisms of Action of Preussin, a Marine Fungal Metabolite, against the Triple-Negative Breast Cancer Cell Line, MDA-MB-231, in 2D and 3D Cultures. Mar Drugs 2023; 21:md21030166. [PMID: 36976215 PMCID: PMC10053333 DOI: 10.3390/md21030166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Triple-negative breast cancer (TNBC) represents an aggressive subtype of breast cancer (BC) with a typically poorer prognosis than other subtypes of BC and limited therapeutic options. Therefore, new drugs would be particularly welcome to help treat TNBC. Preussin, isolated from the marine sponge-associated fungus, Aspergillus candidus, has shown the potential to reduce cell viability and proliferation as well as to induce cell death and cell cycle arrest in 2D cell culture models. However, studies that better mimic the tumors in vivo, such as 3D cell cultures, are needed. Here, we studied the effects of preussin in the MDA-MB-231 cell line, comparing 2D and 3D cell cultures, using ultrastructural analysis and the MTT, BrdU, annexin V-PI, comet (alkaline and FPG modified versions), and wound healing assays. Preussin was found to decrease cell viability, both in 2D and 3D cell cultures, in a dose-dependent manner, impair cell proliferation, and induce cell death, therefore excluding the hypothesis of genotoxic properties. The cellular impacts were reflected by ultrastructural alterations in both cell culture models. Preussin also significantly inhibited the migration of MDA-MB-231 cells. The new data expanded the knowledge on preussin actions while supporting other studies, highlighting its potential as a molecule or scaffold for the development of new anticancer drugs against TNBC.
Collapse
|
3
|
Głowacka IE, Trocha A, Wróblewski AE, Piotrowska DG. N-(1-Phenylethyl)aziridine-2-carboxylate esters in the synthesis of biologically relevant compounds. Beilstein J Org Chem 2019; 15:1722-1757. [PMID: 31435446 PMCID: PMC6664392 DOI: 10.3762/bjoc.15.168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 07/05/2019] [Indexed: 12/13/2022] Open
Abstract
Since Garner’s aldehyde has several drawbacks, first of all is prone to racemization, alternative three-carbon chirons would be of great value in enantioselective syntheses of natural compounds and/or drugs. This review article summarizes applications of N-(1-phenylethyl)aziridine-2-carboxylates, -carbaldehydes and -methanols in syntheses of approved drugs and potential medications as well as of natural products mostly alkaloids but also sphingoids and ceramides and their 1- and 3-deoxy analogues and several hydroxy amino acids and their precursors. Designed strategies provided new procedures to several drugs and alternative approaches to natural products and proved efficiency of a 2-substituted N-(1-phenylethyl)aziridine framework as chiron bearing a chiral auxiliary.
Collapse
Affiliation(s)
- Iwona E Głowacka
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| | - Aleksandra Trocha
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| | - Andrzej E Wróblewski
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| | - Dorota G Piotrowska
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| |
Collapse
|
4
|
Hausherr A, Siemeister G, Reissig HU. Alkoxyallene-based syntheses of preussin and its analogs and their cytotoxicity. Org Biomol Chem 2018; 17:122-134. [PMID: 30520931 DOI: 10.1039/c8ob02645a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Short syntheses of oxa-preussin, racemic preussin and (-)-preussin are reported. Starting from a racemic 3-nonyl-substituted methoxyallene derivative, its lithiation and addition to phenylethanal provided the corresponding allenyl alcohol that was converted into two diastereomeric dihydrofuran derivatives by silver nitrate-catalyzed 5-endo-trig cyclization. The acid hydrolysis of the enol ether moiety gave heterocyclic ketones and subsequent highly stereoselective reductions with l-selectride furnished 2-benzyl-5-nonylfuran-3-ol derivatives in good overall yield. The major all-cis-diastereomer has the skeleton and relative configuration of preussin and is hence called oxa-preussin. An analogous sequence with the same allene, but an N-sulfonyl imine as the electrophile, finally led to racemic preussin. The stereoselectivities of the individual steps are discussed in detail. With an enantiopure 2-benzyl-5-nonylpyrrolidin-3-one intermediate the preparation of (-)-preussin with an enantiomeric ratio of >95 : 5 could be accomplished in a few steps. The sign of the optical rotation of this product finally proved the absolute configurations of its precursors and demonstrated that our chiral auxiliary-based route led to the antipode of the natural product. The cytotoxicity of several of the prepared heterocycles against MCF-7 tumor cells was investigated and five compounds, including racemic and enantiopure (-)-preussin, were identified as highly cytotoxic with IC50 values in the range of 3-6 μM.
Collapse
Affiliation(s)
- Arndt Hausherr
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany.
| | | | | |
Collapse
|
5
|
Zhou D, Wang C, Li M, Long Z, Lan J. Palladium-catalyzed 2-pyridylmethyl-directed β-C(sp3) H activation and cyclization of aliphatic amides with gem-dibromoolefins: A rapid access to γ-lactams. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
6
|
Ye JL, Zhu YN, Geng H, Huang PQ. Metal-free synthesis of quinolines by direct condensation of amides with alkynes: revelation of N-aryl nitrilium intermediates by 2D NMR techniques. Sci China Chem 2017. [DOI: 10.1007/s11426-017-9160-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
7
|
Kumar Thota G, Tamilarasan D, Balamurugan R. Synthesis of Highly Functionalized Pyrrolidine Derivatives from Easily Accessible Diethyl (E
)-4-Oxohex-2-enedioate. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ganesh Kumar Thota
- School of Chemistry; University of Hyderabad; 500046 Gauchibowli, Hyderabad Telangana India
| | | | - Rengarajan Balamurugan
- School of Chemistry; University of Hyderabad; 500046 Gauchibowli, Hyderabad Telangana India
| |
Collapse
|
8
|
Mateo P, Cinqualbre JE, Meyer Mojzes M, Schenk K, Renaud P. Reductive Alkylation of Tertiary Lactams via Addition of Organocopper (RCu) Reagents to Thioiminium Ions. J Org Chem 2017; 82:12318-12327. [DOI: 10.1021/acs.joc.7b02150] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pierre Mateo
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Joséphine E. Cinqualbre
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Melinda Meyer Mojzes
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Kurt Schenk
- Laboratoire
de Magnétisme Quantique, Ecole Polytechnique Fédérale de Lausanne, BSP 314, Rte de la Sorge, CH-1015 Lausanne, Switzerland
| | - Philippe Renaud
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| |
Collapse
|
9
|
Huang PQ, Fan T. Intramolecular Keto Lactam Condensation: A Convenient and Straightforward Approach to Bicyclic Vinylogous Lactams. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; 300071 Tianjin P. R. China
| | - Ting Fan
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
| |
Collapse
|
10
|
Rong HJ, Yao JJ, Li JK, Qu J. Molecular Iodine-Mediated α-C–H Oxidation of Pyrrolidines to N,O-Acetals: Synthesis of (±)-Preussin by Late-Stage 2,5-Difunctionalizations of Pyrrolidine. J Org Chem 2017; 82:5557-5565. [DOI: 10.1021/acs.joc.7b00361] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hao-Jie Rong
- The State Key Laboratory
and Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jun-Jun Yao
- The State Key Laboratory
and Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ji-Kun Li
- The State Key Laboratory
and Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin Qu
- The State Key Laboratory
and Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China
| |
Collapse
|
11
|
Li Y, Li J, Ding H, Li A. Recent advances on the total synthesis of alkaloids in mainland China. Natl Sci Rev 2017. [DOI: 10.1093/nsr/nwx050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
AbstractAlkaloids are a large family of natural products that mostly contain basic nitrogen atoms. Because of their intriguing structures and important functions, they have long been popular targets for synthetic organic chemists. China's chemists have made significant progress in the area of alkaloid synthesis over past decades. In this article, selected total syntheses of alkaloids from research groups in mainland China during the period 2011–16 are highlighted.
Collapse
Affiliation(s)
- Yong Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Jian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| |
Collapse
|
12
|
Huang PQ, Huang YH. Further Studies on the Direct Synthesis ofα,β-Unsaturated Ketimines andα,β-Enones by Chemoselective Dehydrative Addition of Functionalized Alkenes to Secondary Amides. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600700] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Ying-Hong Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| |
Collapse
|
13
|
Huang PQ, Ou W. A Direct, Versatile, and Chemoselective Synthesis of Vinylogous Bis- and Monourethanes/amides and β-Keto Esters by Aza-Knoevenagel-Type Reactions of Tertiary Amides with Enolates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601326] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P.R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; 300071 Tianjin P. R. China
| | - Wei Ou
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P.R. China
| |
Collapse
|
14
|
Si CM, Shao LP, Mao ZY, Zhou W, Wei BG. An efficient approach to trans-4-hydroxy-5-substituted 2-pyrrolidinones through a stereoselective tandem Barbier process: divergent syntheses of (3R,4S)-statines, (+)-preussin and (−)-hapalosin. Org Biomol Chem 2017; 15:649-661. [DOI: 10.1039/c6ob02523d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Natural products of (+)-preussin and (−)-hapalosin have been asymmetrically synthesized through the stereoselective tandem Barbier process.
Collapse
Affiliation(s)
- Chang-Mei Si
- Department of Natural Products Chemistry
- School of Pharmacy
- Fudan University
- Shanghai
- China
| | - Lu-Ping Shao
- Department of Natural Products Chemistry
- School of Pharmacy
- Fudan University
- Shanghai
- China
| | - Zhuo-Ya Mao
- Department of Natural Products Chemistry
- School of Pharmacy
- Fudan University
- Shanghai
- China
| | - Wen Zhou
- Department of Natural Products Chemistry
- School of Pharmacy
- Fudan University
- Shanghai
- China
| | - Bang-Guo Wei
- Department of Natural Products Chemistry
- School of Pharmacy
- Fudan University
- Shanghai
- China
| |
Collapse
|
15
|
Huang PQ, Chen H. Ni-Catalyzed cross-coupling reactions of N-acylpyrrole-type amides with organoboron reagents. Chem Commun (Camb) 2017; 53:12584-12587. [DOI: 10.1039/c7cc07457c] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report the first Ni/bis-NHC-catalyzed cross-coupling of N-acylpyrrole-type amides with arylboronic esters to obtain diarylketones.
Collapse
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- and Fujian Provincial Key Laboratory of Chemical Biology
- Xiamen University
- Xiamen
| | - Hang Chen
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- and Fujian Provincial Key Laboratory of Chemical Biology
- Xiamen University
- Xiamen
| |
Collapse
|
16
|
Huang PQ, Huang YH, Wang SR. One-pot synthesis of N-heterocycles and enimino carbocycles by tandem dehydrative coupling–reductive cyclization of halo-sec-amides and dehydrative cyclization of olefinic sec-amides. Org Chem Front 2017. [DOI: 10.1039/c6qo00720a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a versatile approach for the one-pot synthesis of substituted pyrrolidine, piperidine, indolizidine, and quinolizidine ring systems, and enimino carbocycles.
Collapse
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Ying-Hong Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Shu-Ren Wang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| |
Collapse
|
17
|
Tf2O-TMDS combination for the direct reductive transformation of secondary amides to aldimines, aldehydes, and/or amines. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0224-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
18
|
Huang PQ, Lang QW, Hu XN. One-Pot Reductive 1,3-Dipolar Cycloaddition of Secondary Amides: A Two-Step Transformation of Primary Amides. J Org Chem 2016; 81:10227-10235. [PMID: 27285664 DOI: 10.1021/acs.joc.6b01080] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The one-pot reductive 1,3-dipolar cycloaddition of secondary aromatic N-(trimethylsilylmethyl)amides with reactive dipolarophiles is reported. The method relies on the in situ generation of nonstabilized NH azomethine ylide dipoles via amide activation with triflic anhydride, partial reduction with 1,1,3,3-tetramethyldisiloxane (TMDS), and desilylation with cesium fluoride (CsF). Running under mild conditions, the reaction tolerated several sensitive functional groups and provided cycloadducts in 71-93% yields. The use of less reactive dipolarophile methyl acrylate led to the cycloadduct in only 40% yield. A (Z) geometric intermediate of NH-azomethine 1,3-dipole was postulated to account for the observed higher yields and higher cis diastereoselectivity for the substrates bearing an electron-withdrawing group. This model features an unconventional cyclic transition state via carbanion-aryl ring interaction. Because the starting secondary amides can be prepared from common primary amides, the current method also constitutes a two-step transformation of primary amides.
Collapse
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| | - Qi-Wei Lang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| | - Xiu-Ning Hu
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| |
Collapse
|
19
|
Buchman M, Csatayová K, Davies SG, Fletcher AM, Houlsby ITT, Roberts PM, Rowe SM, Thomson JE. Asymmetric Syntheses of (+)-Preussin B, the C(2)-Epimer of (−)-Preussin B, and 3-Deoxy-(+)-preussin B. J Org Chem 2016; 81:4907-22. [DOI: 10.1021/acs.joc.6b00362] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marek Buchman
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Kristína Csatayová
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Stephen G. Davies
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Ai M. Fletcher
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Ian T. T. Houlsby
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Paul M. Roberts
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Sam M. Rowe
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - James E. Thomson
- Department
of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| |
Collapse
|
20
|
Huang PQ, Lang QW, Wang YR. Mild Metal-Free Hydrosilylation of Secondary Amides to Amines. J Org Chem 2016; 81:4235-43. [DOI: 10.1021/acs.joc.6b00572] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Pei-Qiang Huang
- Department
of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Qi-Wei Lang
- Department
of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Yan-Rong Wang
- Department
of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
| |
Collapse
|
21
|
Zheng JF, Qian XY, Huang PQ. Direct transformation of amides: a one-pot reductive Ugi-type three-component reaction of secondary amides. Org Chem Front 2015. [DOI: 10.1039/c5qo00146c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient reductive Ugi-type reaction employing common secondary amides as starting materials has been established. The reaction exhibited a broad substrate scope, good chemoselectivity and functional group tolerance.
Collapse
Affiliation(s)
- Jian-Feng Zheng
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Xiang-Yang Qian
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| |
Collapse
|