1
|
Brown RCD. The Longer Route can be Better: Electrosynthesis in Extended Path Flow Cells. CHEM REC 2021; 21:2472-2487. [PMID: 34302434 DOI: 10.1002/tcr.202100163] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/02/2021] [Indexed: 01/01/2023]
Abstract
This personal account provides an overview of work conducted in my research group, and through collaborations with other chemists and engineers, to develop flow electrolysis cells and apply these cells in organic electrosynthesis. First, a brief summary of my training and background in organic synthesis is provided, leading in to the start of flow electrosynthesis in my lab in collaboration with Derek Pletcher. Our work on the development of extended path electrolysis flow reactors is described from a synthetic organic chemist's perspective, including laboratory scale-up to give several moles of an anodic methoxylation product in one day. The importance of cell design is emphasised with regards to achieving good performance in laboratory electrosynthesis with productivities from hundreds of mg h-1 to many g h-1 , at high conversion in a selective fashion. A simple design of recycle flow cell that can be readily constructed in a small University workshop is also discussed, including simple modifications to improve cell performance. Some examples of flow electrosyntheses are provided, including Shono-type oxidation, anodic cleavage of protecting groups, Hofer-Moest reaction of cubane carboxylic acids, oxidative esterification and amidation of aldehydes, and reduction of aryl halides.
Collapse
Affiliation(s)
- Richard C D Brown
- School of Chemistry, The University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| |
Collapse
|
2
|
Eskandari R, Hess JP, Tochtrop GP. Synthesis of α,β-unsaturated epoxy ketones utilizing a bifunctional sulfonium/phosphonium ylide. Chem Commun (Camb) 2021; 57:7136-7139. [PMID: 34180477 DOI: 10.1039/d1cc02475b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a new protocol for rapid synthesis of α,β-unsaturated epoxy ketones utilizing a bifunctional sulfonium/phosphonium ylide is described. This approach comprises two sequential chemoselective reactions between sulfonium and phosphonium ylides and two distinct aldehydes, which allows for the rapid construction of a variety of unsymmetric α,β-unsaturated epoxy ketones. This methodology allows the rapid construction of the core reactive functionality of a family of lipid peroxidation products, the epoxyketooctadecenoic acids, but can be further broadly utilized as a useful synthon for the synthesis of natural products, particularly those derived from oxidized fatty acids. Accordingly, a protocol utilizing this approach to synthesize the epoxyketooctadecenoic acid family of molecules is described.
Collapse
Affiliation(s)
- Roozbeh Eskandari
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio, USA.
| | - Jeremy P Hess
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio, USA.
| | - Gregory P Tochtrop
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio, USA.
| |
Collapse
|
3
|
Heravi MM, Zadsirjan V, Hamidi H, Daraie M, Momeni T. Recent applications of the Wittig reaction in alkaloid synthesis. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2020; 84:201-334. [PMID: 32416953 DOI: 10.1016/bs.alkal.2020.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Wittig reaction is the chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (the Wittig reagent) to afford an alkene and triphenylphosphine oxide. Noteworthy, this reaction results in the synthesis of alkenes in a selective and predictable fashion. Thus, it became as one of the keystone of synthetic organic chemistry, especially in the total synthesis of natural products, where the selectivity of a reaction is paramount of importance. A literature survey disclosed the existence of vast numbers of related reports and comprehensive reviews on the applications of this important name reaction in the total synthesis of natural products. However, the aim of this chapter is to underscore, the applications of the Wittig reaction in the total synthesis of one the most important and prevalent classes of natural products, the alkaloids, especially those showing important and diverse biological activities.
Collapse
Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran.
| | - Vahideh Zadsirjan
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| | - Hoda Hamidi
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| | - Mansoureh Daraie
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| | - Tayebeh Momeni
- Department of Chemistry, School of Science, Alzahra University, Tehran, Iran
| |
Collapse
|
4
|
Cheng B, Reyes J. Recent progress on the total syntheses of macrocyclic diamine alkaloids. Nat Prod Rep 2020; 37:322-337. [DOI: 10.1039/c9np00031c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review highlights the progress and challenges in the chemical synthesis of macrocyclic diamine alkaloids since 2006.
Collapse
Affiliation(s)
- Bichu Cheng
- School of Science
- Harbin Institute of Technology
- Shenzhen
- China
| | - Julius Reyes
- Department of Chemistry
- New York University
- New York
- USA
| |
Collapse
|
5
|
Dung DT, Hang DTT, Yen PH, Quang TH, Nhiem NX, Tai BH, Minh CV, Kim YC, Kim DC, Oh H, Kiem PV. Macrocyclic bis-quinolizidine alkaloids from Xestospongia muta. Nat Prod Res 2018; 33:400-406. [DOI: 10.1080/14786419.2018.1455043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Duong Thi Dung
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Dan Thi Thuy Hang
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Pham Hai Yen
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tran Hong Quang
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nguyen Xuan Nhiem
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Bui Huu Tai
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Chau Van Minh
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Youn-Chul Kim
- College of Pharmacy, Wonkwang University, Iksan, Korea
| | | | - Hyuncheol Oh
- College of Pharmacy, Wonkwang University, Iksan, Korea
| | - Phan Van Kiem
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| |
Collapse
|
6
|
Stereocontrolled total synthesis and biological evaluation of (−)- and (+)-petrosin and its derivatives. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
7
|
Yadav J, Reddy US, Reddy BS. Stereoselective synthesis of tetrahydropyran–tetrahydrofuran (THP–THF) core of (+)-muconin via Prins cyclization. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
8
|
SINGH KEISHAMSARJIT, DAS BABULAL, NAIK CHANDRAKANTG. Quinolizidines alkaloids: Petrosin and xestospongins from the sponge Oceanapia sp. J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0124-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
Du D, Duan WL. Palladium-catalyzed 1,4-addition of diarylphosphines to α,β-unsaturated N-acylpyrroles. Chem Commun (Camb) 2011; 47:11101-3. [DOI: 10.1039/c1cc13785a] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Toya H, Okano K, Takasu K, Ihara M, Takahashi A, Tanaka H, Tokuyama H. Enantioselective Total Synthesis of (−)- and (+)-Petrosin. Org Lett 2010; 12:5196-9. [DOI: 10.1021/ol1022257] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroki Toya
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| | - Kentaro Okano
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| | - Kiyosei Takasu
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| | - Masataka Ihara
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| | - Atsushi Takahashi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| | - Haruo Tanaka
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan, and Faculty of Pharmacy and College of Science and Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan
| |
Collapse
|
11
|
Jones G, Abarca B. The Chemistry of the [1,2,3]Triazolo[1,5-a]pyridines: An Update. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 100 2010. [DOI: 10.1016/s0065-2725(10)10007-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
12
|
Triazolopyridines. Part 25: Synthesis of new chiral ligands from [1,2,3]triazolo[1,5-a]pyridines. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.101] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
13
|
Vrettou M, Gray AA, Brewer AR, Barrett AG. Strategies for the synthesis of C2 symmetric natural products—a review. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.09.109] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
14
|
|
15
|
P. Hsung R, Wang J, J. Swidorski J, Sydorenko N, A. Coverdale H, M. Kuyava J, Liu J. Aza-[3+3] Annulations. Part 6. Total Synthesis of Putative (-)-Lepadiformine and (-)-Cylindricine C. HETEROCYCLES 2006. [DOI: 10.3987/com-06-s(w)40] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
16
|
Torre MH, Gambino D, Araujo J, Cerecetto H, González M, Lavaggi ML, Azqueta A, López de Cerain A, Vega AM, Abram U, Costa-Filho AJ. Novel Cu(II) quinoxaline N1,N4-dioxide complexes as selective hypoxic cytotoxins. Eur J Med Chem 2005; 40:473-80. [PMID: 15893021 DOI: 10.1016/j.ejmech.2004.11.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2004] [Revised: 11/05/2004] [Accepted: 11/22/2004] [Indexed: 11/30/2022]
Abstract
As an effort to develop novel selective hypoxia-cytotoxins and to improve bioavailability and pharmacological and toxicological properties of quinoxaline N1,N4-dioxide derivatives (L1 = 3-amino-6(7)-chloroquinoxaline-2-carbonitrile N1,N4-dioxide, L2 = 3-amino-6(7)-bromoquinoxaline-2-carbonitrile N1,N4-dioxide and L3 = 3-amino-6(7)-methylquinoxaline-2-carbonitrile N1,N4-dioxide) and to get a synergism among metals and these type of bioreductive agents, L2 and three novel Cu(II) complexes of general formulae [Cu(II)(H2O)x(L - H)2], where L = L1 (x = 1), L2 (x = 0) or L3 (x = 2) were developed. L2 and complexes were synthesized and structurally characterized by elemental and thermal analyses, and FTIR, electronic, MS, NMR, and EPR spectroscopies. The new compounds were subjected to cytotoxic evaluation in V79 cells in hypoxic and aerobic conditions. The complexes showed excellent selective cytotoxicity in hypoxia, being their cytotoxicity similar to or higher than that of the ligands L1-L3. Besides, the copper complexes were so poorly cytotoxic in oxia as the free ligands. In addition, for the first time Cu(II)-quinoxaline complexes are reported as a family of hypoxic cytotoxins.
Collapse
Affiliation(s)
- María H Torre
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11200 Montevideo, Uruguay.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Coumbarides GS, Dingjan M, Eames J, Flinn A, Northen J, Yohannes Y. Efficient parallel resolution of an active ester of 2-phenylpropionic acid using quasi-enantiomeric Evans’ oxazolidinones. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.02.139] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
18
|
Salem NM, Ebraheem KA, Mubarak MS. The effects of spacer groups on the chelation characteristics of some new mannich polymers containing 8-hydroxyquinoline. REACT FUNCT POLYM 2004. [DOI: 10.1016/j.reactfunctpolym.2003.09.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
19
|
Zhu S, Liao Y, Zhu S. Transition-Metal-Catalyzed Formation of trans Alkenes via Coupling of Aldehydes. Org Lett 2004; 6:377-80. [PMID: 14748597 DOI: 10.1021/ol036197s] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Rh(2)(OAc)(4) catalyzed the formation of exclusively trans fluorinated alkenes from aldehydes and pentafluorobenzaldehyde tosylhydrazone salts, which were readily prepared from pentafluorobenzaldehyde using the Bamford-Stevens reaction. A series of pentafluorophenyl-containing alkenes were synthesized from aldehydes in moderate to good yields under mild reaction conditions in a one-pot reaction. It is the first report of coupling two different aldehydes to form exclusively trans alkenes.
Collapse
Affiliation(s)
- Shifa Zhu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, PR China
| | | | | |
Collapse
|
20
|
Hermet JPR, Porter DW, Dearden MJ, Harrison JR, Koplin T, O'Brien P, Parmene J, Tyurin V, Whitwood AC, Gilday J, Smith NM. Synthesis of sparteine-like chiral diamines and evaluation in the enantioselective lithiation–substitution of N-(tert-butoxycarbonyl)pyrrolidine. Org Biomol Chem 2003; 1:3977-88. [PMID: 14664387 DOI: 10.1039/b308410h] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three chiral diamines were synthesised and evaluated as sparteine surrogates in the lithiation-substitution of N-(tert-butoxycarbonyl)pyrrolidine. The synthesis and attempted resolution of sparteine-like diamines [(1S*,2R*,8R*)-10-methyl-6,10-diazatricyclo[6.3.1.0(2,6)]dodecane and (1S*,2R*,9R*)-11-methyl-7,11-diazatricyclo[7.3.1.0(2,7)]tridecane] (via inclusion complex formation) are reported. Unfortunately, it was only possible to resolve the diazatricyclo[7.3.1.0(2,7)]tridecane compound. An alternative route to (1R,2S,9S)-11-methyl-7,11-diazatricyclo[7.3.1.0(2,7)]tridecane starting from the natural product, (-)-cytisine, is described. This simple three-step route furnished gram-quantities of a (+)-sparteine surrogate. X-Ray crystallography of an intermediate in the route, (1R,5S,12S)-3-methoxycarbonyldecahydro-1,5-methanopyrido[1,2-a][1,5]diazocin-8-one, enabled the stereochemistry of all of the tricyclic diamines described in this paper to be unequivocally established. Two other diamines, starting from (S)-proline and resolved 2-piperidine ethanol, were prepared using standard methods. These diamines lacked the bispidine framework of (-)-sparteine and were found to impart vastly inferior enantioselectivity. It was concluded that, for the asymmetric lithiation substitution of N-Boc pyrrolidine, a rigid bispidine framework and only three of the four rings of (-)-sparteine are needed for high enantioselectivity. Furthermore, it is shown that diamine (1R,2S,9S)-11-methyl-7,11-diazatricyclo[7.3.1.0(2,7)]tridecane is the first successful (+)-sparteine surrogate.
Collapse
Affiliation(s)
- Jean-Paul R Hermet
- Department of Chemistry, University of York, Heslington, York, UK YO10 5DD
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Sun M, Deng Y, Batyreva E, Sha W, Salomon RG. Novel bioactive phospholipids: practical total syntheses of products from the oxidation of arachidonic and linoleic esters of 2-lysophosphatidylcholine(1). J Org Chem 2002; 67:3575-84. [PMID: 12027667 DOI: 10.1021/jo0105383] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Total syntheses of nine novel phospholipids were accomplished to facilitate the identification and biological testing of compounds that are generated upon oxidative cleavage of arachidonate and linoleate esters of 2-lysophosphatidylcholine, the two most abundant polyunsaturated phospholipids in low-density lipoprotein. An efficient general synthesis exploiting 2-lithiofuran as a 4-oxo-2-butenoyl carbanion equivalent provided phospholipids containing gamma-keto-alpha,beta-unsaturated carbonyl functional arrays. By exploiting facile cis-trans isomerizations, two commercially available cis alkenes, (2Z)-2-butene-1,4-diol and 2,5-dihydrofuran, could be employed as starting materials for preparing the Horner-Wadsworth-Emmons reagent 4-(diethoxyphosphoryl)-2E-butenal, a valuable building block for the synthesis of 2,4-dienals. The reagent was exploited in a total synthesis of 13-oxotridec-9E,11E-dienoic acid, confirming the identity of this product that is generated upon autoxidation of linoleic acid and by decomposition of 13-hydroperoxy-9,11-octadecadienoate (13-HPODE), especially in the presence of redox active transition metal ions, cytochrome p-450, or hydroperoxide lyase.
Collapse
Affiliation(s)
- Mingjiang Sun
- Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106-7078, USA
| | | | | | | | | |
Collapse
|
22
|
Ebraheem KAK, Mubarak MS, Al-Gharabli SI. SYNTHESIS AND CHELATION PROPERTIES OF SOME NEW MANNICH CONDENSATION POLYMERS CONTAINING A SALICYLALDOXIME GROUP. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2002. [DOI: 10.1081/ma-120013261] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
23
|
Michael JP. Simple indolizidine and quinolizidine alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2002; 55:91-258. [PMID: 11704985 DOI: 10.1016/s0099-9598(01)55004-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- J P Michael
- Centre for Molecular Design, Department of Chemistry, University of the Witwatersrand, Wits 2050, South Africa
| |
Collapse
|
24
|
Addition of carbon nucleophiles to substituted N-acyliminium ions. A stereoselective route to trans-fused decahydroquinoline systems. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)01362-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
25
|
Diastereoselective hydroboration of chiral enamines using an enantiomerically pure amine from an industrial waste material as the source of chirality. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00169-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
26
|
Affiliation(s)
| | - Richard C. D. Brown
- Department of Chemistry, University of California, Berkeley, California 94720
| | - Thea C. Norman
- Department of Chemistry, University of California, Berkeley, California 94720
| |
Collapse
|