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Park S, Myeong IS, Ham WH. Recent advances in the total synthesis of polyhydroxylated alkaloids via chiral oxazines. Org Biomol Chem 2024; 22:894-926. [PMID: 38230703 DOI: 10.1039/d3ob01624b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
This review summarizes recently established methodologies developed for the enantioselective and diastereoselective synthesis of chiral 1,3-oxazines. These compounds are of interest as advanced synthetic intermediates in the total synthesis of structurally complex and biologically active polyhydroxylated alkaloids such as (+)-1-deoxynojirimycin, (-)-anisomycin, (+)-castanospermine, (+)-casuarine, (-)-conduramine F-1, (-)-sphingofungin B, Neu5Ac methyl ester, and other natural products. The devised synthetic approach aims to offer a direct, efficient, and adaptable method for obtaining both pure enantiomers and pure diastereomers. It revolves around utilizing chiral building blocks like syn,syn-, syn,syn,anti-, syn,anti-, syn,anti,syn-, anti,syn-, anti,syn,syn-, and anti,syn,anti-oxazines. By integrating oxazine chemistry with established and innovative transformations, this approach enabled the synthesis of 30 polyhydroxylated amines across various studies conducted between 2007 and 2022.
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Affiliation(s)
- Seokhwi Park
- YS Life Science Co., Ltd, 207, Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, 18581, Republic of Korea.
| | - In-Soo Myeong
- College of Pharmacy, Daegu Catholic University, 13-13, Hayang-ro, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38430, Republic of Korea.
| | - Won-Hun Ham
- YS Life Science Co., Ltd, 207, Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, 18581, Republic of Korea.
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Suwon-si, Gyeonggi-do, 16419, Republic of Korea
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2
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Xu WK, Guo JM, Liu CH, Sun JT, Lv M, Wei BG. AgNTf 2 catalyzed cycloaddition of N-acyliminium ions with alkynes for the synthesis of the 3,4-dihydro-1,3-oxazin-2-one skeleton. Org Biomol Chem 2022; 20:5086-5094. [PMID: 35698865 DOI: 10.1039/d2ob00900e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A catalyzed process for the synthesis of the 4,6-substituted 3,4-dihydro-1,3-oxazin-2-one skeleton has been developed through cycloaddition of in situ generated acyliminium intermediates with alkynes. A range of chain N,O-acetals and terminal alkynes were amenable for this mild transformation. As a result, a series of desired cycloaddition products were obtained in moderate to good yields.
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Affiliation(s)
- Wen-Ke Xu
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Jia-Ming Guo
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Chang-Hong Liu
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Jian-Ting Sun
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Min Lv
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
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3
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Li YX, Wang JZ, Kato A, Shimadate Y, Kise M, Jia YM, Fleet GWJ, Yu CY. Stereocomplementary synthesis of casuarine and its 6- epi-, 7- epi-, and 6,7-di epi-stereoisomers. Org Biomol Chem 2021; 19:9410-9420. [PMID: 34668913 DOI: 10.1039/d1ob01725j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four diastereomers belonging to the family of casuarines, including casuarine (1), 6-epi-casuarine (2), 7-epi-casuarine (13) and 6,7-diepi-casuarine (14), have been synthesized from D-arabinose-derived cyclic nitrone 7 and nitrone-derived aldehyde 4 by a stereocomplementary strategy. Glycosidase inhibition comparison showed that 6-epi-casuarine (2) exhibits enhanced inhibition of trehalase (IC50 = 9.7 μM) and 6,7-diepi-casuarine (14) leads to specific inhibition of trehalase.
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Affiliation(s)
- Yi-Xian Li
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun-Zhe Wang
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Atsushi Kato
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Yuna Shimadate
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Maki Kise
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Yue-Mei Jia
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - George W J Fleet
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Chu-Yi Yu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
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4
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Ferjancic Z, Saicic RN. Combining Organocatalyzed Aldolization and Reductive Amination: An Efficient Reaction Sequence for the Synthesis of Iminosugars. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100398] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zorana Ferjancic
- University of Belgrade – Faculty of Chemistry Studentski trg 16, POB 51 11158 Belgrade 118 Serbia
| | - Radomir N. Saicic
- University of Belgrade – Faculty of Chemistry Studentski trg 16, POB 51 11158 Belgrade 118 Serbia
- Serbian Academy of Sciences and Arts Kneza Mihaila 35 11 000 Belgrade Serbia
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Mao ZY, Wang C, Nie XD, Han XL, Dong HQ, Si CM, Wei BG. Sc(OTf)3-catalyzed intramolecular diastereoselective cyclization from tert-butoxycarbonyl to acyliminium ion. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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6
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Sun JT, Chen LY, Wei BG. Samarium Diiodide Promoted the Addition-Ring-Opening Reaction of 2-Piperidinone with α, β-Unsaturated Esters. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202106040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Zhang YX, Chen LY, Sun JT, Si CM, Wei BG. Gold-Catalyzed Addition–N-Boc Cleavage–Cyclization of N,O-Acetal with Ynamides for Construction of 6-(tert-Butyldimethylsilyl)oxy-tetrahydropyrrolo[1,2-c][1,3]oxazin-1-ones. J Org Chem 2020; 85:12603-12613. [DOI: 10.1021/acs.joc.0c01776] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yan-Xue Zhang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Ling-Yan Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Jian-Ting Sun
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
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Matassini C, Parmeggiani C, Cardona F. New Frontiers on Human Safe Insecticides and Fungicides: An Opinion on Trehalase Inhibitors. Molecules 2020; 25:E3013. [PMID: 32630325 PMCID: PMC7411730 DOI: 10.3390/molecules25133013] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 12/28/2022] Open
Abstract
In the era of green economy, trehalase inhibitors represent a valuable chance to develop non-toxic pesticides, being hydrophilic compounds that do not persist in the environment. The lesson on this topic that we learned from the past can be of great help in the research on new specific green pesticides. This review aims to describe the efforts made in the last 50 years in the evaluation of natural compounds and their analogues as trehalase inhibitors, in view of their potential use as insecticides and fungicides. Specifically, we analyzed trehalase inhibitors based on sugars and sugar mimics, focusing on those showing good inhibition properties towards insect trehalases. Despite their attractiveness as a target, up to now there are no trehalase inhibitors that have been developed as commercial insecticides. Although natural complex pseudo di- and trisaccharides were firstly studied to this aim, iminosugars look to be more promising, showing an excellent specificity profile towards insect trehalases. The results reported here represent an overview and a discussion of the best candidates which may lead to the development of an effective insecticide in the future.
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Affiliation(s)
- Camilla Matassini
- Dipartimento di Chimica “Ugo Schiff”, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy;
| | - Camilla Parmeggiani
- Dipartimento di Chimica “Ugo Schiff”, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy;
- European Laboratory for Non-linear Spectroscopy via Nello Carrara 1, 50019 Sesto Fiorentino, Italy
| | - Francesca Cardona
- Dipartimento di Chimica “Ugo Schiff”, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy;
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9
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Wang MX, Liu J, Liu Z, Wang Y, Yang QQ, Shan W, Deng YH, Shao Z. Enantioselective synthesis of chiral α-alkynylated thiazolidones by tandem S-addition/acetalization of alkynyl imines. Org Biomol Chem 2020; 18:3117-3124. [PMID: 32253417 DOI: 10.1039/d0ob00365d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A SPINOL-derived chiral phosphoric acid catalyzed asymmetric formal [2 + 3]-annulation of in situ generated alkynyl imines and 1,4-dithiane-2,5-diol has been developed to afford enantiopure α-alkynylated thiazolidones with up to 72% yield and 98.5 : 1.5 er. This tandem annulation involved a tandem S-addition of alkynyl imines/intramolecular acetalization, followed by PDC-mediated oxidation. The α-alkynylated thiazolidones could facilely afford the corresponding chiral α-alkynylated or α-alkenylated cyclic sulfoxides via further elaboration.
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Affiliation(s)
- Mei-Xin Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
| | - Juan Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China. and Yunnan Baiyao Group CO., Ltd, Kunming, 650500, China
| | - Zhen Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
| | - Yingcheng Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
| | - Qi-Qiong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
| | - Wenyu Shan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
| | - Yu-Hua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
| | - Zhihui Shao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
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10
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Synthesis of γ-lactams via trifluoromethylative aminocarbonylation of unactivated olefins. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151479] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Chen D, Ji M, Zhu C. Intramolecular nitration–aminocarbonylation of unactivated olefins: metal-free synthesis of γ-lactams. Chem Commun (Camb) 2019; 55:7796-7799. [DOI: 10.1039/c9cc03736e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, metal-free synthesis of valuable γ-lactams through the radical-mediated nitration–aminocarbonylation of unactivated olefins is reported.
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Affiliation(s)
- Dong Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Meishan Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
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12
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13
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Synthesis of Nitrogen Heterocycles Using Samarium(II) Iodide. Molecules 2017; 22:molecules22112018. [PMID: 29160806 PMCID: PMC6150357 DOI: 10.3390/molecules22112018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 11/11/2017] [Accepted: 11/13/2017] [Indexed: 11/19/2022] Open
Abstract
Nitrogen heterocycles represent vital structural motifs in biologically-active natural products and pharmaceuticals. As a result, the development of new, convenient and more efficient processes to N-heterocycles is of great interest to synthetic chemists. Samarium(II) iodide (SmI2, Kagan’s reagent) has been widely used to forge challenging C–C bonds through reductive coupling reactions. Historically, the use of SmI2 in organic synthesis has been focused on the construction of carbocycles and oxygen-containing motifs. Recently, significant advances have taken place in the use of SmI2 for the synthesis of nitrogen heterocycles, enabled in large part by the unique combination of high reducing power of this reagent (E1/2 of up to −2.8 V) with excellent chemoselectivity of the reductive umpolung cyclizations mediated by SmI2. In particular, radical cross-coupling reactions exploiting SmI2-induced selective generation of aminoketyl radicals have emerged as concise and efficient methods for constructing 2-azabicycles, pyrrolidines and complex polycyclic barbiturates. Moreover, a broad range of novel processes involving SmI2-promoted formation of aminyl radicals have been leveraged for the synthesis of complex nitrogen-containing molecular architectures by direct and tethered pathways. Applications to the synthesis of natural products have highlighted the generality of processes and the intermediates accessible with SmI2. In this review, recent advances involving the synthesis of nitrogen heterocycles using SmI2 are summarized, with a major focus on reductive coupling reactions that enable one-step construction of nitrogen-containing motifs in a highly efficient manner, while taking advantage of the spectacular selectivity of the venerable Kagan’s reagent.
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Huang HM, Procter DJ. Radical Heterocyclization and Heterocyclization Cascades Triggered by Electron Transfer to Amide-Type Carbonyl Compounds. Angew Chem Int Ed Engl 2017; 56:14262-14266. [DOI: 10.1002/anie.201708354] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Huan-Ming Huang
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
| | - David J. Procter
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
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15
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Huang HM, Procter DJ. Radical Heterocyclization and Heterocyclization Cascades Triggered by Electron Transfer to Amide-Type Carbonyl Compounds. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708354] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Huan-Ming Huang
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
| | - David J. Procter
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
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Gharpure SJ, Nanda LN, Kumari D. Enantiospecific Total Synthesis of (+)-3-epi
-Epohelmin A Using a Nitrogen-Substituted Donor-Acceptor Cyclopropane. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700498] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Santosh J. Gharpure
- Department of Chemistry; Indian Institute of Technology Bombay; 400076 Powai, Mumbai India
| | - Laxmi Narayan Nanda
- Department of Chemistry; Indian Institute of Technology Bombay; 400076 Powai, Mumbai India
| | - Dimple Kumari
- Department of Chemistry; Indian Institute of Technology Bombay; 400076 Powai, Mumbai India
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17
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Mao H, You BX, Zhou LJ, Xie TT, Wen YH, Lv X, Wang XX. SmI2-mediated reductive cyclization of β-arylthio ketones: a facile and diastereoselective synthesis of thiochroman derivatives. Org Biomol Chem 2017; 15:6157-6166. [DOI: 10.1039/c7ob01082f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
SmI2-mediated reductive cyclization of β-arylthio ketones afforded a general approach to dihydrothiochroman-ols in good yields and high degrees of diastereoselectivity.
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Affiliation(s)
- Hui Mao
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Bing-Xin You
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Lie-Jin Zhou
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Ting-Ting Xie
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Yi-Hang Wen
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Xin Lv
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Xiao-Xia Wang
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
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Martinez ST, Belouezzane C, Pinto AC, Glasnov T. Synthetic Strategies towards the Azabicyclo[3.3.0]-Octane Core of Natural Pyrrolizidine Alkaloids. An Overview. ORG PREP PROCED INT 2016. [DOI: 10.1080/00304948.2016.1165058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Zheng X, He J, Li HH, Wang A, Dai XJ, Wang AE, Huang PQ. Titanocene(III)-Catalyzed Three-Component Reaction of Secondary Amides, Aldehydes, and Electrophilic Alkenes. Angew Chem Int Ed Engl 2015; 54:13739-42. [DOI: 10.1002/anie.201506907] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Indexed: 02/01/2023]
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20
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Zheng X, He J, Li HH, Wang A, Dai XJ, Wang AE, Huang PQ. Titanocene(III)-Catalyzed Three-Component Reaction of Secondary Amides, Aldehydes, and Electrophilic Alkenes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506907] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Abstract
This review of simple indolizidine and quinolizidine alkaloids (i.e., those in which the parent bicyclic systems are in general not embedded in polycyclic arrays) is an update of the previous coverage in Volume 55 of this series (2001). The present survey covers the literature from mid-1999 to the end of 2013; and in addition to aspects of the isolation, characterization, and biological activity of the alkaloids, much emphasis is placed on their total synthesis. A brief introduction to the topic is followed by an overview of relevant alkaloids from fungal and microbial sources, among them slaframine, cyclizidine, Steptomyces metabolites, and the pantocins. The important iminosugar alkaloids lentiginosine, steviamine, swainsonine, castanospermine, and related hydroxyindolizidines are dealt with in the subsequent section. The fourth and fifth sections cover metabolites from terrestrial plants. Pertinent plant alkaloids bearing alkyl, functionalized alkyl or alkenyl substituents include dendroprimine, anibamine, simple alkaloids belonging to the genera Prosopis, Elaeocarpus, Lycopodium, and Poranthera, and bicyclic alkaloids of the lupin family. Plant alkaloids bearing aryl or heteroaryl substituents include ipalbidine and analogs, secophenanthroindolizidine and secophenanthroquinolizidine alkaloids (among them septicine, julandine, and analogs), ficuseptine, lasubines, and other simple quinolizidines of the Lythraceae, the simple furyl-substituted Nuphar alkaloids, and a mixed quinolizidine-quinazoline alkaloid. The penultimate section of the review deals with the sizable group of simple indolizidine and quinolizidine alkaloids isolated from, or detected in, ants, mites, and terrestrial amphibians, and includes an overview of the "dietary hypothesis" for the origin of the amphibian metabolites. The final section surveys relevant alkaloids from marine sources, and includes clathryimines and analogs, stellettamides, the clavepictines and pictamine, and bis(quinolizidine) alkaloids.
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22
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Veyron A, Reddy PV, Koos P, Bayle A, Greene AE, Delair P. Stereocontrolled synthesis of glycosidase inhibitors (+)-hyacinthacines A1 and A2. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2014.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Park SH, Jin X, Kang JC, Jung C, Kim SS, Kim SS, Lee KY, Ham WH. Chirality extension of an oxazine building block en route to total syntheses of (+)-hyacinthacine A2 and sphingofungin B. Org Biomol Chem 2015; 13:4539-50. [DOI: 10.1039/c5ob00251f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Concise total syntheses of (+)-hyacinthacine A2 and sphingofungin B were achieved by palladium(0)-catalyzed intramolecular oxazine formation and diastereoselective nucleophilic additions.
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Affiliation(s)
- Seok-Hwi Park
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
| | - Xiangdan Jin
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
| | - Jong-Cheol Kang
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
| | - Changyoung Jung
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
| | - Seong-Soo Kim
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
| | - Sung-Soo Kim
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
| | - Kee-Young Lee
- Yonsung Fine Chemicals Co
- Ltd
- Hwaseong 445-944, Republic of Korea
| | - Won-Hun Ham
- School of Pharmacy
- Sungkyunkwan University
- Suwon 440-746, Republic of Korea
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24
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Minehira D, Okada T, Iwaki R, Kato A, Adachi I, Toyooka N. Enantiodivergent strategy for the synthesis of polyhydroxylated pyrrolizidines and evaluation of their inhibitory activities against glycosidases. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Zheng X, Liu J, Ye CX, Wang A, Wang AE, Huang PQ. SmI2-Mediated Radical Coupling Strategy to Securinega Alkaloids: Total Synthesis of (−)-14,15-Dihydrosecurinine and Formal Total Synthesis of (−)-Securinine. J Org Chem 2014; 80:1034-41. [DOI: 10.1021/jo502522x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao Zheng
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Juan Liu
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Chen-Xi Ye
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Ao Wang
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Ai-E Wang
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Pei-Qiang Huang
- Department
of Chemistry and The Key Laboratory for Chemical Biology of Fujian
Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
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26
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Streuff J. Reductive umpolung reactions with low-valent titanium catalysts. CHEM REC 2014; 14:1100-13. [PMID: 25234255 DOI: 10.1002/tcr.201402058] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 12/24/2022]
Abstract
The coupling of similarly polarized carbon fragments can be achieved by a reductive umpolung strategy. This gives access to compounds with functional groups in even bond distances, which are difficult to synthesize by other means. Low-valent titanium catalysts enable such couplings under mild conditions. This account covers the recent progress on this topic with a focus on the development of cross-selective coupling reactions and stereoselective examples.
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Affiliation(s)
- Jan Streuff
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, D-79104, Freiburg, Germany.
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27
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Abstract
This review covers pyrrolizidine alkaloids isolated from natural sources. Topics include: aspects of structure, isolation, and biological/pharmacological studies; total syntheses of necic acids, necine bases and closely-related non-natural analogues.
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Affiliation(s)
- Jeremy Robertson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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28
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Concia AL, Gómez L, Parella T, Joglar J, Clapés P. Casuarine Stereoisomers from Achiral Substrates: Chemoenzymatic Synthesis and Inhibitory Properties. J Org Chem 2014; 79:5386-9. [DOI: 10.1021/jo500991p] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Alda Lisa Concia
- Biotransformation
and Bioactive Molecules Group, Departamento de Química Biológica
y Modelización Molecular, Instituto de Química Avanzada de Cataluña, IQAC−CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Livia Gómez
- Biotransformation
and Bioactive Molecules Group, Departamento de Química Biológica
y Modelización Molecular, Instituto de Química Avanzada de Cataluña, IQAC−CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Teodor Parella
- Servei
de Ressonància Magnètica Nuclear, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Jesús Joglar
- Biotransformation
and Bioactive Molecules Group, Departamento de Química Biológica
y Modelización Molecular, Instituto de Química Avanzada de Cataluña, IQAC−CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Pere Clapés
- Biotransformation
and Bioactive Molecules Group, Departamento de Química Biológica
y Modelización Molecular, Instituto de Química Avanzada de Cataluña, IQAC−CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
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29
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Savaspun K, Au CWG, Pyne SG. Total Synthesis of Hyacinthacines B3, B4, and B5 and Purported Hyacinthacine B7, 7-epi-Hyacinthacine B7, and 7a-epi-Hyacinthacine B3 from a Common Precursor. J Org Chem 2014; 79:4569-81. [DOI: 10.1021/jo5005923] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kongdech Savaspun
- School
of Chemistry, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Christopher W. G. Au
- 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
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30
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Szostak M, Fazakerley NJ, Parmar D, Procter DJ. Cross-Coupling Reactions Using Samarium(II) Iodide. Chem Rev 2014; 114:5959-6039. [DOI: 10.1021/cr400685r] [Citation(s) in RCA: 290] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Michal Szostak
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Neal J. Fazakerley
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Dixit Parmar
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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31
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Iminosugars: Therapeutic Applications and Synthetic Considerations. TOPICS IN MEDICINAL CHEMISTRY 2014. [DOI: 10.1007/7355_2014_50] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
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32
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Zhang J, Zhang HK, Huang PQ. Towards stereochemical control: A short formal enantioselective total synthesis of pumiliotoxins 251D and 237A. Beilstein J Org Chem 2013; 9:2358-66. [PMID: 24367400 PMCID: PMC3869269 DOI: 10.3762/bjoc.9.271] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 10/10/2013] [Indexed: 11/23/2022] Open
Abstract
A concise enantioselective synthesis of the advanced intermediate 5 for the synthesis of pumiliotoxins (Gallagher's intermediate) is described. The synthesis started from the regio- and trans-diastereoselective (dr = 98:2) reductive 3-butenylation of (R)-3-(tert-butyldimethylsilyloxy)glutarimide 14. After O-desilylation and Dess-Martin oxidation, the resulting keto-lactam 10 was subjected to a highly trans-stereoselective addition of the methylmagnesium iodide to give carbinol 11 as sole diastereomer. An efficient ring closure procedure consisting of ozonolysis and reductive dehydroxylation provided the indolizidine derivative 5, which completed the formal enantioselective total synthesis of pumiliotoxins 251D and 237A.
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Affiliation(s)
- Jie Zhang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Hong-Kui Zhang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
- State Key Laboratory of Applied Organic Chemistry Lanzhou University, Lanzhou 730000, P. R. China
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33
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Marjanovic J, Divjakovic V, Matovic R, Ferjancic Z, Saicic RN. Double Asymmetric Induction in Organocatalyzed Aldol Reactions: Total Synthesis of (+)-2-epi-Hyacinthacine A2and (-)-3-epi-Hyacinthacine A1. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300716] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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34
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Stereocomplementary Routes to Hydroxylated Nitrogen Heterocycles: Total Syntheses of Casuarine, Australine, and 7-epi-Australine. Chemistry 2013; 19:10595-604. [DOI: 10.1002/chem.201301320] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Indexed: 11/07/2022]
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35
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Reddy PV, Smith J, Kamath A, Jamet H, Veyron A, Koos P, Philouze C, Greene AE, Delair P. Asymmetric Approach to Hyacinthacines B1 and B2. J Org Chem 2013; 78:4840-9. [DOI: 10.1021/jo400386f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paidi Venkatram Reddy
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Julien Smith
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Anushree Kamath
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Hélène Jamet
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Amaël Veyron
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Peter Koos
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Christian Philouze
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Andrew E. Greene
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
| | - Philippe Delair
- SERCO, ‡Theoretical Chemistry, and §MUST, Département
de Chimie Moléculaire, University Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5250, F-38041
Grenoble, France
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36
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Umpolung of Hemiaminals: Titanocene-Catalyzed Dehydroxylative Radical Coupling Reactions with Activated Alkenes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201210088] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Zheng X, Dai XJ, Yuan HQ, Ye CX, Ma J, Huang PQ. Umpolung of Hemiaminals: Titanocene-Catalyzed Dehydroxylative Radical Coupling Reactions with Activated Alkenes. Angew Chem Int Ed Engl 2013; 52:3494-8. [DOI: 10.1002/anie.201210088] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Indexed: 11/11/2022]
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38
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Brock EA, Davies SG, Lee JA, Roberts PM, Thomson JE. Polyhydroxylated pyrrolizidine alkaloids from transannular iodoaminations: application to the asymmetric syntheses of (−)-hyacinthacine A1, (−)-7a-epi-hyacinthacine A1, (−)-hyacinthacine A2, and (−)-1-epi-alexine. Org Biomol Chem 2013; 11:3187-202. [DOI: 10.1039/c3ob40205c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Dénès F, Schiesser CH, Renaud P. Thiols, thioethers, and related compounds as sources of C-centred radicals. Chem Soc Rev 2013; 42:7900-42. [DOI: 10.1039/c3cs60143a] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Tuo S, Liu X, Huang P. Towards Stereochemical Control: Two Approaches for the Highlyanti-Diastereoselective Construction of the Spirolactone Moieties of SomeStemonaAlkaloids. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200904] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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41
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Hu KZ, Ma J, Qiu S, Zheng X, Huang PQ. SmI2-mediated intermolecular coupling of γ-lactam N-α-radicals with activated alkenes: asymmetric synthesis of 11-hydroxylated analogues of the lead compounds CP-734432 and PF-04475270. J Org Chem 2012; 78:1790-801. [PMID: 22853560 DOI: 10.1021/jo301277n] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report, for the first time, the synthesis of 8-aza-analogues of PGE2. The SmI2-mediated cross coupling reactions of γ-lactam-hemiaminal 9, lactam 2-pyridyl sulfide 17, and lactam 2-pyridyl sulfone 18 with activated alkenes/alkyne were first developed, giving the corresponding γ-lactams in 49-78%, 45-75%, and 75-90%, respectively. The reactions of lactam 2-pyridyl sulfide and 2-pyridyl sulfone proceeded with ≥12:1 trans-diastereoselectivities. This represents the first intermolecular coupling reaction of the γ-lactam N-α-alkyl radicals of types B, B1, and B2 with activated alkenes. Two radical-based mechanisms were suggested. The asymmetric synthesis of the 11-hydroxylated analogue of the highly selective EP4 receptor agonist PF-04475270 (30), the 11-hydroxylated analogue of ocular hypotensive CP-734432 (31), compounds 35 and 36 have been achieved on the basis of this method.
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Affiliation(s)
- Kong-Zhen Hu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China
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42
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Kondakal VV, Ilyas Qamar M, Hemming K. The synthesis of hydroxy-pyrrolizidines and indolizidines from cyclopropenones: towards hyacinthacines, australines and jenamidines. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.117] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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43
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Martı́nez-Montero S, Fernández S, Sanghvi YS, Chattopadhyaya J, Ganesan M, Ramesh NG, Gotor V, Ferrero M. Design and Divergent Synthesis of Aza Nucleosides from a Chiral Imino Sugar. J Org Chem 2012; 77:4671-8. [DOI: 10.1021/jo3004452] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Saúl Martı́nez-Montero
- Departamento de Quı́mica Orgánica e Inorgánica
and Instituto Universitario de Biotecnologı́a de Asturias, Universidad de Oviedo, 33006 Oviedo
(Asturias), Spain
- Program of Bioorganic Chemistry, Institute
of Cell and
Molecular Biology, Biomedical Centre, Uppsala University, SE-75123 Uppsala, Sweden
| | - Susana Fernández
- Departamento de Quı́mica Orgánica e Inorgánica
and Instituto Universitario de Biotecnologı́a de Asturias, Universidad de Oviedo, 33006 Oviedo
(Asturias), Spain
| | - Yogesh S. Sanghvi
- Rasayan Inc., 2802 Crystal Ridge Road, Encinitas, California
92024-6615, United
States
| | - Jyoti Chattopadhyaya
- Program of Bioorganic Chemistry, Institute
of Cell and
Molecular Biology, Biomedical Centre, Uppsala University, SE-75123 Uppsala, Sweden
| | - Muthupandian Ganesan
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Namakkal G. Ramesh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Vicente Gotor
- Departamento de Quı́mica Orgánica e Inorgánica
and Instituto Universitario de Biotecnologı́a de Asturias, Universidad de Oviedo, 33006 Oviedo
(Asturias), Spain
| | - Miguel Ferrero
- Departamento de Quı́mica Orgánica e Inorgánica
and Instituto Universitario de Biotecnologı́a de Asturias, Universidad de Oviedo, 33006 Oviedo
(Asturias), Spain
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44
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Xu CP, Huang PQ, Py S. SmI2-Mediated Coupling of Nitrones and tert-Butanesulfinyl Imines with Allenoates: Synthesis of β-Methylenyl-γ-lactams and Tetramic Acids. Org Lett 2012; 14:2034-7. [DOI: 10.1021/ol300550x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chu-Pei Xu
- Département de Chimie Moléculaire (SERCO) UMR 5250, ICMG FR-2607, CNRS-Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 09, France, and Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Département de Chimie Moléculaire (SERCO) UMR 5250, ICMG FR-2607, CNRS-Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 09, France, and Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Sandrine Py
- Département de Chimie Moléculaire (SERCO) UMR 5250, ICMG FR-2607, CNRS-Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 09, France, and Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
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45
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Szostak M, Spain M, Procter DJ. Preparation of Samarium(II) Iodide: Quantitative Evaluation of the Effect of Water, Oxygen, and Peroxide Content, Preparative Methods, and the Activation of Samarium Metal. J Org Chem 2012; 77:3049-59. [PMID: 22375820 DOI: 10.1021/jo300135v] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michal Szostak
- School of Chemistry, University of Manchester, Oxford
Road, Manchester, M13 9PL, United Kingdom
| | - Malcolm Spain
- School of Chemistry, University of Manchester, Oxford
Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School of Chemistry, University of Manchester, Oxford
Road, Manchester, M13 9PL, United Kingdom
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46
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Zhuang JJ, Ye JL, Zhang HK, Huang PQ. An unexpected high erythro-selection in the Grignard reaction with an N,O-acetal: a concise asymmetric synthesis of indolizidine alkaloid (−)-2-epi-lentiginosine. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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González-Esguevillas M, Adrio J, Carretero JC. Cu-catalyzed asymmetric [3+2] cycloaddition of α-iminoamides with activated olefins. Chem Commun (Camb) 2012; 48:2149-51. [DOI: 10.1039/c2cc17149j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Liu XK, Zheng X, Ruan YP, Ma J, Huang PQ. One-pot reductive coupling of N-acylcarbamates with activated alkenes: application to the asymmetric synthesis of pyrrolo[1,2-a]azepin-5-one ring system and (−)-xenovenine. Org Biomol Chem 2012; 10:1275-84. [DOI: 10.1039/c1ob06697h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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