1
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Lakshman MK, Sebastian D, Pradhan P, Neary MC, Piette AM, Trzebiatowski SP, Henriques AEK, Willoughby PH. Nitrene C-H Bond Insertion Approach to Carbazolones and Indolones, and a Reactivity Departure for 7-Membered Analogues. Chemistry 2023; 29:e202302995. [PMID: 37751465 DOI: 10.1002/chem.202302995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 09/28/2023]
Abstract
A modular platform for facile access to 1,2,3,9-tetrahydro-4H-carbazol-4-ones (H4 -carbazolones) and 3,4-dihydrocyclopenta[b]indol-1(2H)-ones (H2 -indolones) is described. The requisite 6- and 5-membered 2-arylcycloalkane-1,3-dione precursors were readily obtained through a Cu-catalyzed arylation of 1,3-cyclohexanediones or by a ring expansion of aryl succinoin derivatives. Enolization of one carbonyl group in the diones, conversion to a leaving group, and subsequent azidation gave 2-aryl-3-azidocycloalk-2-en-1-ones. This two-step, one-pot azidation is highly regioselective with unsymmetrically substituted 2-arylcyclohexane-1,3-diones. The regioselectivity, which is important for access to single isomers of 3,3-disubstituted carbazolones, was analyzed mechanistically and computationally. Finally, a Rh-catalyzed nitrene/nitrenoid insertion into the ortho C-H bond of the aryl moiety gave the H4 -carbazolones and H2 -indolones. One carbazolone was elaborated to an intermediate reported in the total synthesis of N-decarbomethoxychanofruticosinate, (-)-aspidospermidine, (+)-kopsihainanine A. With 2-phenylcycloheptane-1,3-dione, prepared from cyclohexanone and benzaldehyde, the azidation reaction was readily accomplished. However, the Rh-catalyzed reaction unexpectedly led to a labile but characterizable azirine rather than the indole derivative. Computations were performed to understand the differences in reactivities of the 5- and 6-membered 2-aryl-3-azidocycloalk-2-en-1-ones in comparison to the 7-membered analogue, and to support the structural assignment of the azirine.
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Affiliation(s)
- Mahesh K Lakshman
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA
- The Graduate Center of the City University of New York, The Ph.D. Program in Chemistry, 365 Fifth Avenue, New York, NY 10016, USA
| | - Dellamol Sebastian
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA
- The Graduate Center of the City University of New York, The Ph.D. Program in Chemistry, 365 Fifth Avenue, New York, NY 10016, USA
| | - Padmanava Pradhan
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA
| | - Michelle C Neary
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, NY 10065, USA
| | - Alexis M Piette
- Department of Chemistry, Ripon College, 300 W. Seward St., Ripon, WI 54971, USA
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2
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Kiprova N, Desnoyers M, Narobe R, Klufts-Edel A, Chaud J, König B, Compain P, Kern N. Towards a General Access to 1-Azaspirocyclic Systems via Photoinduced, Reductive Decarboxylative Radical Cyclizations. Chemistry 2023:e202303841. [PMID: 38084823 DOI: 10.1002/chem.202303841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Indexed: 01/13/2024]
Abstract
A convenient and versatile approach to important 1-azaspirocyclic systems relevant to medicinal chemistry and natural products is reported herein. The main strategy relies on a reductive decarboxylative cyclization of redox-active esters which can be rapidly assembled from abundant cyclic azaacids and tailored acceptor sidechains, with a focus on alkyne acceptors enabling the generation of useful exo-alkene moieties. Diastereoconvergent variants were studied and could be achieved either through remote stereocontrol or conformational restriction in bicyclic carbamate substrates. Two sets of metal-free photocatalytic conditions employing inexpensive eosin Y were disclosed and studied experimentally to highlight key mechanistic divergences.
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Affiliation(s)
- Natalia Kiprova
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Marine Desnoyers
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Rok Narobe
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, Germany
| | - Arthur Klufts-Edel
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Juliane Chaud
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, Germany
| | - Philippe Compain
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Nicolas Kern
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
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3
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Affiliation(s)
- Hongjun Jeon
- Therapeutics and Biotechnology Division Korea Research Institute of Chemical Technology (KRICT) 141 Gajeong-ro, Yuseong-gu Daejeon 34114 Republic of Korea
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4
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Chen S, Zhang Z, Jiang C, Zhao C, Luo H, Huang J, Yang Z. Stereoselective Synthesis of trans-Decalin-Based Spirocarbocycles via Photocyclization of 1,2-Diketones. ACS OMEGA 2021; 6:18848-18859. [PMID: 34337224 PMCID: PMC8320103 DOI: 10.1021/acsomega.1c02054] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Diastereoselective synthesis of the trans-decalin-based α-hydroxyl butanone spirocarbocycles bearing all-carbon quaternary stereogenic centers has been achieved via Norrish-Yang photocyclization of trans-decalin-substituted-2,3-butanediones using daylight. Density functional theory (DFT) calculations suggest that this diastereoselective reaction is affected by both substrate conformation and intramolecular hydrogen bonds. The developed chemistry could be applied to synthesizing the derivatives of the trans-decalin-based biologically important natural products.
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Affiliation(s)
- Sijia Chen
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
| | - Zhongchao Zhang
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
| | - Chongguo Jiang
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
| | - Chunbo Zhao
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
| | - Haojie Luo
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
| | - Jun Huang
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
| | - Zhen Yang
- State
Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate
School, Shenzhen 518055, China
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- Shenzhen
Bay Laboratory, Shenzhen 518055, China
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5
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Kim JH, Jeon H, Park C, Park S, Kim S. Collective Asymmetric Total Synthesis of C‐11 Oxygenated
Cephalotaxus
Alkaloids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101766] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jae Hyun Kim
- College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
- College of Pharmacy Kangwon National University 1 Kangwondaehak-gil Chuncheon Gangwon-do 24341 Republic of Korea
| | - Hongjun Jeon
- College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Choyi Park
- College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Soojun Park
- College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Sanghee Kim
- College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
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6
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Kim JH, Jeon H, Park C, Park S, Kim S. Collective Asymmetric Total Synthesis of C-11 Oxygenated Cephalotaxus Alkaloids. Angew Chem Int Ed Engl 2021; 60:12060-12065. [PMID: 33733565 DOI: 10.1002/anie.202101766] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Indexed: 12/20/2022]
Abstract
While numerous studies pertaining to the total synthesis of Cephalotaxus alkaloids have been reported, only two strategies have been reported to date for the successful synthesis of the C-11 oxygenated subset, due to the additional synthetic challenge posed by the remote C-11 stereocenter. Herein, we report the collective asymmetric total synthesis of C-11 oxygenated Cephalotaxus alkaloids using a chiral proline both as a starting material and as the only chirality source. A tetracyclic advanced intermediate was synthesized in a highly stereoselective manner from l-proline in 8 steps involving sequential chirality transfer steps such as a diastereoselective N-alkylation, stereospecific Stevens rearrangement and intramolecular Friedel-Crafts reaction via an unusual O-acyloxocarbenium intermediate. From a common intermediate, the asymmetric total synthesis of six C-11 oxygenated Cephalotaxus alkaloids was completed by a series of oxidation state adjustments.
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Affiliation(s)
- Jae Hyun Kim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.,College of Pharmacy, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon-do, 24341, Republic of Korea
| | - Hongjun Jeon
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Choyi Park
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Soojun Park
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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7
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Zhang ZW, Wang CC, Xue H, Dong Y, Yang JH, Liu S, Liu WQ, Li WDZ. Asymmetric Formal Synthesis of (−)-Cephalotaxine via Palladium-Catalyzed Enantioselective Tsuji Allylation. Org Lett 2018; 20:1050-1053. [DOI: 10.1021/acs.orglett.7b04008] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Zhi-Wei Zhang
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Cui-Cui Wang
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Hong Xue
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Yu Dong
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Jian-Hua Yang
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Shouxin Liu
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Wen-Qing Liu
- State Key Laboratory Breeding Base-Hebei Province Key Laboratory of Molecular Chemistry for Drug, College of Chemical & Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, P. R. China
| | - Wei-Dong Z. Li
- School
of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
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8
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Pérard-Viret J, Quteishat L, Alsalim R, Royer J, Dumas F. Cephalotaxus Alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2017; 78:205-352. [PMID: 28838429 PMCID: PMC7110560 DOI: 10.1016/bs.alkal.2017.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cephalotaxus alkaloids represent a family of plant secondary metabolites known for 60 years. Significant activity against leukemia in mice was demonstrated for extracts of Cephalotaxus. Cephalotaxine (CET) (1), the major alkaloid of this series was isolated from Cephalotaxus drupacea species by Paudler in 1963. The subsequent discovery of promising antitumor activity among new Cephalotaxus derivatives reported by Chinese, Japanese, and American teams triggered extensive structure elucidation and biological studies in this family. The structural feature of this cephalotaxane family relies mainly on its tetracyclic alkaloid backbone, which comprises an azaspiranic 1-azaspiro[4.4]nonane unit (rings C and D) and a benzazepine ring system (rings A and B), which is linked by its C3 alcohol function to a chiral oxygenated side chain by a carboxylic function alpha to a tetrasubstituted carbon center. The botanical distribution of these alkaloids is limited to the Cephalotaxus genus (Cephalotaxaceae). The scope of biological activities of the Cephalotaxus alkaloids is mainly centered on the antileukemic activity of homoharringtonine (HHT) (2), which in particular demonstrated marked benefits in the treatment of orphan myeloid leukemia and was approved as soon as 2009 by European Medicine Agency and by US Food and Drug Administration in 2012. Its exact mechanism of action was partly elucidated and it was early recognized that HHT (2) inhibited protein synthesis at the level of the ribosome machinery. Interestingly, after a latency period of two decades, the topic of Cephalotaxus alkaloids reemerged as a prolific source of new natural structures. To date, more than 70 compounds have been identified and characterized. Synthetic studies also regained attention during the past two decades, and numerous methodologies were developed to access the first semisynthetic HHT (2) of high purity suitable for clinical studies, and then high grade enantiomerically pure CET (1), HHT (2), and analogs.
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Affiliation(s)
- Joëlle Pérard-Viret
- Université Paris Descartes, CNRS, Université Sorbonne Paris Cité, Paris, France
| | - Laith Quteishat
- Université Paris Sud, CNRS, Université Paris Saclay, Châtenay-Malabry, France
| | - Rana Alsalim
- Université Paris Sud, CNRS, Université Paris Saclay, Châtenay-Malabry, France
| | - Jacques Royer
- Université Paris Descartes, CNRS, Université Sorbonne Paris Cité, Paris, France
| | - Françoise Dumas
- Université Paris Sud, CNRS, Université Paris Saclay, Châtenay-Malabry, France
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9
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Moulins JR, Hughes JA, Doyle LE, Cameron TS, Burnell DJ. Two Rearrangement Pathways in the Geminal Acylation of 2-Methoxyoxazolidines Leading to Substituted 1,4-Oxazines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403371] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Rizzo A, Harutyunyan SR. Azabicycles construction: the transannular ring contraction with N-protected nucleophiles. Org Biomol Chem 2014; 12:6570-9. [DOI: 10.1039/c4ob01311e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Synthetic strategies are one of the most critical factors for the success of a synthetic campaign, but most importantly they are crucial for the economy and the efficiency of the sequence.
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Affiliation(s)
- Antonio Rizzo
- University of Groningen
- Stratingh Institute
- Groningen, Netherlands
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11
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Bonderoff SA, Grant TN, West FG, Tremblay M. Nazarov Reactions of Vinyl Cyclopropylamines: An Approach to the Imino-Nazarov Problem. Org Lett 2013; 15:2888-91. [DOI: 10.1021/ol4012663] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sara A. Bonderoff
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
| | - Tina N. Grant
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
| | - F. G. West
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
| | - Martin Tremblay
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, Alberta, Canada, T6G 2G2, and Boehringer Ingelheim (Canada), Ltd., 2100 rue Cunard, Laval, Québec, Canada, H7S 2G5
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12
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Zhang QW, Xiang K, Tu YQ, Zhang SY, Zhang XM, Zhao YM, Zhang TC. Formal synthesis of (-)-cephalotaxine based on a tandem hydroamination/semipinacol rearrangement reaction. Chem Asian J 2012; 7:894-8. [PMID: 22383373 DOI: 10.1002/asia.201101029] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Indexed: 11/12/2022]
Affiliation(s)
- Qing-Wei Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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13
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Abdelkafi H, Nay B. Natural products from Cephalotaxus sp.: chemical diversity and synthetic aspects. Nat Prod Rep 2012; 29:845-69. [DOI: 10.1039/c2np20037f] [Citation(s) in RCA: 140] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Park HJ, Choi JH, Park BN, Yoon UC, Cho DW, Mariano PS. A strategy for the preparation of cyclic polyarenes based on single electron transfer-promoted photocyclization reactions. RESEARCH ON CHEMICAL INTERMEDIATES 2011. [DOI: 10.1007/s11164-011-0422-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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15
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Li WDZ, Duo WG, Zhuang CH. Concise Total Synthesis of (±)-Cephalotaxine via a Transannulation Strategy: Development of a Facile Reductive oxy-Nazarov Cyclization. Org Lett 2011; 13:3538-41. [DOI: 10.1021/ol201390r] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei-Dong Z. Li
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Wei-Guo Duo
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Cheng-Han Zhuang
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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16
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Girling PR, Kiyoi T, Whiting A. Mannich–Michael versus formal aza-Diels–Alder approaches to piperidine derivatives. Org Biomol Chem 2011; 9:3105-21. [DOI: 10.1039/c0ob00996b] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Pottie IR, Crane SN, Gosse AL, Miller DO, Burnell DJ. Geminal acylation of α-heterosubstituted cyclohexanones and their ketals. CAN J CHEM 2010. [DOI: 10.1139/v10-097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Geminal acylation of derivatives of cyclohexanone with Br, Cl, F, and OCH3 in the α position, and of their corresponding dimethyl ketals, could not be accomplished to a significant extent following published procedures. The transformation was accomplished in two steps. The initial BF3·Et2O-mediated reaction with 1,2-bis(trimethylsilyloxy)cyclobutene gave a cyclobutanone product as a mixture of diastereomers. Only with 2-chlorocyclohexanone did this occur with good diastereoselectivity. Then, pinacol rearrangement of the diastereomeric mixture mediated by Amberlyst-15 in benzene provided the heterosubstituted spirocyclic diketone.
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Affiliation(s)
- Ian R. Pottie
- Department of Chemistry and Physics, Mount Saint Vincent University, Halifax, NS B3M 2J6, Canada
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
| | - Sheldon N. Crane
- Department of Chemistry and Physics, Mount Saint Vincent University, Halifax, NS B3M 2J6, Canada
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
| | - Anna Lee Gosse
- Department of Chemistry and Physics, Mount Saint Vincent University, Halifax, NS B3M 2J6, Canada
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
| | - David O. Miller
- Department of Chemistry and Physics, Mount Saint Vincent University, Halifax, NS B3M 2J6, Canada
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
| | - D. Jean Burnell
- Department of Chemistry and Physics, Mount Saint Vincent University, Halifax, NS B3M 2J6, Canada
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
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19
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Zhao YM, Gu P, Zhang HJ, Zhang QW, Fan CA, Tu YQ, Zhang FM. Formal Syntheses of (±)-Stemonamine and (±)-Cephalotaxine. J Org Chem 2009; 74:3211-3. [DOI: 10.1021/jo900113s] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu-Ming Zhao
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peiming Gu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hai-Jun Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qing-Wei Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chun-An Fan
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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20
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Hameed A, Blake AJ, Hayes CJ. A Second Generation Formal Synthesis of (−)-Cephalotaxine. J Org Chem 2008; 73:8045-8. [DOI: 10.1021/jo801540q] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Abdul Hameed
- The School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
| | - Alexander J. Blake
- The School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
| | - Christopher J. Hayes
- The School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
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21
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Taniguchi T, Ishibashi H. Short Synthesis of (−)-Cephalotaxine Using a Radical Cascade. Org Lett 2008; 10:4129-31. [DOI: 10.1021/ol801747m] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tsuyoshi Taniguchi
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroyuki Ishibashi
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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22
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Esmieu WR, Worden SM, Catterick D, Wilson C, Hayes CJ. A Formal Synthesis of (-)-Cephalotaxine. Org Lett 2008; 10:3045-8. [DOI: 10.1021/ol8010166] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- William R. Esmieu
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K., and GlaxoSmithKline, Old Powder Mills, Tonbridge, Kent TN11 9AN, U.K
| | - Stephen M. Worden
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K., and GlaxoSmithKline, Old Powder Mills, Tonbridge, Kent TN11 9AN, U.K
| | - David Catterick
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K., and GlaxoSmithKline, Old Powder Mills, Tonbridge, Kent TN11 9AN, U.K
| | - Claire Wilson
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K., and GlaxoSmithKline, Old Powder Mills, Tonbridge, Kent TN11 9AN, U.K
| | - Christopher J. Hayes
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K., and GlaxoSmithKline, Old Powder Mills, Tonbridge, Kent TN11 9AN, U.K
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23
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Eckelbarger JD, Wilmot JT, Epperson MT, Thakur CS, Shum D, Antczak C, Tarassishin L, Djaballah H, Gin DY. Synthesis of antiproliferative Cephalotaxus esters and their evaluation against several human hematopoietic and solid tumor cell lines: uncovering differential susceptibilities to multidrug resistance. Chemistry 2008; 14:4293-306. [PMID: 18366032 PMCID: PMC2631657 DOI: 10.1002/chem.200701998] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Deoxyharringtonine (2), homoharringtonine (3), homodeoxyharringtonine (4), and anhydroharringtonine (5) are reported to be among the most potent members of the antileukemia alkaloids isolated from the Cephalotaxus genus. Convergent syntheses of these four natural products are described, each involving novel synthetic methods and strategies. These syntheses enabled evaluation of several advanced natural and non-natural compounds against an array of human hematopoietic and solid tumor cells. Potent cytotoxicity was observed in several cell lines previously not challenged with these alkaloids. Variations in the structure of the ester chain within this family of alkaloids confer differing activity profiles against vincristine-resistant HL-60/RV+, signalling new avenues for molecular design of these natural products to combat multi-drug resistance.
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Affiliation(s)
- Joseph D. Eckelbarger
- J. D. Eckelbarger, M. T. Epperson, Department of Chemistry, University of Illinois, Urbana, IL 61801 (USA)
| | - Jeremy T. Wilmot
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
| | - Matthew T. Epperson
- J. D. Eckelbarger, M. T. Epperson, Department of Chemistry, University of Illinois, Urbana, IL 61801 (USA)
| | - Chandar S. Thakur
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
| | - David Shum
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
| | - Christophe Antczak
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
| | - Leonid Tarassishin
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
| | - Hakim Djaballah
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
| | - David Y. Gin
- J. T. Wilmot, C. S. Thakur, D. Shum, C. Antczak, L. Tarassishin, Dr. H. Djaballah, Prof. D. Y. Gin, Memorial Sloan-Kettering Cancer Center, Molecular Pharmacology and Chemistry Program, 1275 York Avenue, New York, NY 10065 (USA)
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24
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25
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Abstract
Palladium-catalyzed transformations are of great importance in modern synthetic organic chemistry. The vast number of reactions that can be catalyzed by Pd0- as well as Pd2+-complexes in combination with the relative stability of the intermediates offers the intriguing opportunity of carrying out multiple consecutive bond-forming processes. They can be even performed in a domino fashion and in the presence of chiral ligands to allow the efficient preparation of almost enantiopure compounds. In this article, the use of double Heck, Tsuji-Trost-Heck, and Wacker-Heck reactions for the total syntheses of estradiol, spinosyn A analogs, cephalotaxine, and vitamin E is described.
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26
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Moore SP, Coote SC, O'Brien P, Gilday J. New Route to Azaspirocycles via the Organolithium-Mediated Conversion of β-Alkoxy Aziridines into Cyclopentenyl Amines. Org Lett 2006; 8:5145-8. [PMID: 17048864 DOI: 10.1021/ol062073e] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new three-step route to azaspirocycles involving the organolithium-mediated conversion of beta-alkoxy aziridines into substituted cyclopentenyl amines, hydroboration, and cyclization has been developed. The methodology is utilized in the construction of the pentacyclic ring system of cephalotaxine. [reaction: see text]
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Affiliation(s)
- Stephen P Moore
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
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27
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Zhao Z, Mariano PS. Application of the photocyclization reaction of 1,2-cyclopenta-fused pyridinium perchlorate to formal total syntheses of (−)-cephalotaxine. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.045] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Furman B, Dziedzic M. Tetrabutylammonium triphenyldifluorosilicate (TBAT) initiated intramolecular addition of allylsilanes to 2,3-dihydro-4-pyridones. A novel route for the stereoselective construction of indolizidine systems. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01678-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Blanchard AN, Burnell D. First intramolecular geminal acylation: synthesis of bridged bicyclic diketones. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00852-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Abstract
A main issue in modern synthetic organic chemistry, which deals with the preparation of natural products, pharmaceuticals, diagnostics, agrochemicals, and other important materials, is the improvement of efficiency, the avoidance of toxic reagents, the reduction of waste, and the responsible treatment of our resources. One of the ways to fulfill these goals is the development and use of domino processes, which consist of several bond-forming reactions and which allow the highly efficient synthesis of complex molecules starting from simple substrates. Herein, the combination of several catalytic bond-forming transformations is clearly most appropriate. The synthesis of the enantiopure alkaloid (-)-hirsutine 22, which has a strong inhibitorial effect on influenza A viruses, was accomplished using a biomimetic domino Knoevenagel-hetero-Diels Alder-solvolysis-hydrogenation process. In a similar way the alkaloids (+)-dihydrocorynantheine 23 and (-)-dihydroantirhine 24 as well as heterosteroids 62, D-homosteroids 65 and 68, and azasteroids 25 are prepared. In addition, novel steroid alkaloids 26 are accessible by a combination of the formation of an iminium salt, a hydride shift, and an alkylation. The anti-leukemic pentacyclic (-)-cephalotaxine 27 is obtained by a combination of two Pd-catalyzed reactions.
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Affiliation(s)
- L F Tietze
- Institute of Organic Chemistry of the Georg-August-Universität, Tammannstrasse 2, D-37075 G]ottingen, Germany.
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31
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Tietze L, Schirok H, Wöhrmann M, Schrader K. Efficient Synthesis of Six-Membered Ring D Analogues of the Pentacyclic Alkaloid Cephalotaxine by Two Palladium-Catalyzed Reactions. European J Org Chem 2000. [DOI: 10.1002/1099-0690(200007)2000:13<2433::aid-ejoc2433>3.0.co;2-g] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Photoinduced electron transfer reactions of organosilicon compounds. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s1061-8937(99)80005-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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33
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An approach to the cephalotaxine ring skeleton using an ammonium ylide/Stevens [1, 2]-rearrangement. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00774-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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35
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Molander GA, Hiersemann M. Intramolecular 1,3-dipolar cycloaddition as a tool for the preparation of azaspirocyclic keto aziridines. Synthesis of intermediates for the total synthesis of (±)-cephalotaxine. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)00948-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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36
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Tietze LF, Schirok H. Hocheffiziente Synthese von Cephalotaxin durch zweifache palladiumkatalysierte Cyclisierung. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091027] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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de Oliveira ER, Dumas F, d'Angelo J. A simple, efficient access to functionalized pyrrolobenzazepines related to the ABC core of cephalotaxine. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)00709-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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