1
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Prabhakar Reddy D, Yu B. Total Synthesis of Macrocyclic Dysoxylactam A. Chem Asian J 2020; 15:2467-2469. [PMID: 32667142 DOI: 10.1002/asia.202000482] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/12/2020] [Indexed: 02/06/2023]
Abstract
The total synthesis of dysoxylactam A, a novel 17-membered macrolactam with potent multi-drug-resistant reversing activities, has been achieved, starting from 4-pentene-1-al in a longest linear sequence of 17 steps and 9.5% overall yield. The key transformations consist of iterative aldol and ring-closing metathesis reactions for the construction of the stereochemically enriched polypropionate scaffold and the macrocycle, respectively.
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Affiliation(s)
- D Prabhakar Reddy
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cai Lun Road, Shanghai, 201203, China.,State Key Laboratory of Bio-organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, China
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2
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Bera S, Chatterjee B, Mondal D. Advances in the Asymmetric Synthesis of Bridged and Fused Bicyclic Acetals. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800904] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Smritilekha Bera
- School of Chemical Sciences; Central University of Gujarat; 382030 Gandhinagar Gujarat India
| | - Bhaskar Chatterjee
- Department of Chemistry, Nabadwip; Vidyasagar College; 741302 Nabadwip West Bengal India
| | - Dhananjoy Mondal
- School of Chemical Sciences; Central University of Gujarat; 382030 Gandhinagar Gujarat India
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3
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Kenton NT, Adu‐Ampratwum D, Okumu AA, Zhang Z, Chen Y, Nguyen S, Xu J, Ding Y, McCarron P, Kilcoyne J, Rise F, Wilkins AL, Miles CO, Forsyth CJ. Total Synthesis of (6
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)‐Azaspiracid‐3 Reveals Non‐Identity with the Natural Product. Angew Chem Int Ed Engl 2018; 57:805-809. [DOI: 10.1002/anie.201711006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/16/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Nathaniel T. Kenton
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Daniel Adu‐Ampratwum
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Antony A. Okumu
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Zhigao Zhang
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yong Chen
- Asymchem Life Science No. 71 7th Ave., TEDA Tianjin 300000 P. R. China
| | - Son Nguyen
- Johnson Matthey Pharma Services 25 Patton Road Devens MA 01434 USA
| | - Jianyan Xu
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yue Ding
- Viva Biotech Ltd. 581 Shenkuo Rd., Pudong District Shanghai 201203 China
| | - Pearse McCarron
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
| | - Jane Kilcoyne
- Marine Institute, RinvilleOranmore, Co. Galway Ireland
| | - Frode Rise
- Department of ChemistryUniversity of Oslo 0315 Oslo Norway
| | - Alistair L. Wilkins
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
- Chemistry DepartmentUniversity of Waikato Private Bag 3105 3240 Hamilton New Zealand
| | - Christopher O. Miles
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
| | - Craig J. Forsyth
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
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4
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Kenton NT, Adu‐Ampratwum D, Okumu AA, Zhang Z, Chen Y, Nguyen S, Xu J, Ding Y, McCarron P, Kilcoyne J, Rise F, Wilkins AL, Miles CO, Forsyth CJ. Total Synthesis of (6
R
,10
R
,13
R
,14
R
,16
R
,17
R
,19
S
,20
R
,21
R
,24
S
, 25
S
,28
S
,30
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,32
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,33
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)‐Azaspiracid‐3 Reveals Non‐Identity with the Natural Product. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nathaniel T. Kenton
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Daniel Adu‐Ampratwum
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Antony A. Okumu
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Zhigao Zhang
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yong Chen
- Asymchem Life Science No. 71 7th Ave., TEDA Tianjin 300000 P. R. China
| | - Son Nguyen
- Johnson Matthey Pharma Services 25 Patton Road Devens MA 01434 USA
| | - Jianyan Xu
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yue Ding
- Viva Biotech Ltd. 581 Shenkuo Rd., Pudong District Shanghai 201203 China
| | - Pearse McCarron
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
| | - Jane Kilcoyne
- Marine Institute, RinvilleOranmore, Co. Galway Ireland
| | - Frode Rise
- Department of ChemistryUniversity of Oslo 0315 Oslo Norway
| | - Alistair L. Wilkins
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
- Chemistry DepartmentUniversity of Waikato Private Bag 3105 3240 Hamilton New Zealand
| | - Christopher O. Miles
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
| | - Craig J. Forsyth
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
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5
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Abstract
Kanamienamide is a novel enol ether containing enamide with a single digit micromolar inhibitory activity against cancer cell lines. An efficient and convergent total synthesis of kanamienamide has been developed for the first time, which features a Cu-mediated amide coupling with vinyl iodide at the late stage. Other key transformations include Evans asymmetric alkylation, CBS asymmetric reduction, ring-closing metathesis reaction, and Stork-Zhao-Wittig olefination. This strategy is amenable for facile analogue preparation and SAR studies.
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Affiliation(s)
- D Prabhakar Reddy
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University , Chongqing 401331, P.R. China
| | - Ning Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University , Chongqing 401331, P.R. China
| | - Zhimei Yu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University , Chongqing 401331, P.R. China
| | - Zhen Wang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University , Chongqing 401331, P.R. China
| | - Yun He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University , Chongqing 401331, P.R. China
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6
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Li X, Cheong PHY, Carter RG. Schinortriterpenoids: A Case Study in Synthetic Design. Angew Chem Int Ed Engl 2017; 56:1704-1718. [DOI: 10.1002/anie.201609372] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Xin Li
- Chemistry Department; Oregon State University; Gilbert Hall Room 153 Corvallis OR 9733I USA
| | - Paul Ha-Yeon Cheong
- Chemistry Department; Oregon State University; Gilbert Hall Room 153 Corvallis OR 9733I USA
| | - Rich G. Carter
- Chemistry Department; Oregon State University; Gilbert Hall Room 153 Corvallis OR 9733I USA
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7
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Li X, Cheong PHY, Carter RG. Schinortriterpenoide: eine Fallstudie in Synthesedesign. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201609372] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xin Li
- Chemistry Department; Oregon State University; Gilbert Hall Room 153 Corvallis OR 9733I USA
| | - Paul Ha-Yeon Cheong
- Chemistry Department; Oregon State University; Gilbert Hall Room 153 Corvallis OR 9733I USA
| | - Rich G. Carter
- Chemistry Department; Oregon State University; Gilbert Hall Room 153 Corvallis OR 9733I USA
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8
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Zhang Z, Chen Y, Adu-Ampratwum D, Okumu AA, Kenton NT, Forsyth CJ. Synthesis of the C22–C40 Domain of the Azaspiracids. Org Lett 2016; 18:1824-7. [DOI: 10.1021/acs.orglett.6b00557] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhigao Zhang
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yong Chen
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Daniel Adu-Ampratwum
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Antony Akura Okumu
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Nathaniel T. Kenton
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Craig J. Forsyth
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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9
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Watanabe K, Li J, Veerasamy N, Ghosh A, Carter RG. Stereoselective, Ag-Catalyzed Cyclizations To Access Polysubstituted Pyran Ring Systems: Synthesis of C1-C12 Subunit of Madeirolide A. Org Lett 2016; 18:1744-7. [PMID: 27031993 DOI: 10.1021/acs.orglett.6b00414] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The exploration into the scope of a silver-catalyzed cyclization (AgCC) of propargyl benzoates for accessing pyran ring systems has been reported. The impact of the degree of substitution, nature of the substitution on the carbon backbone/benzoate moiety, and stereochemistry has been evaluated. The application of this methodology to the synthesis of the C1-C12 southern fragment of madeirolide A is disclosed.
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Affiliation(s)
- Kazuhiro Watanabe
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Jinming Li
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Nagarathanam Veerasamy
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Ankan Ghosh
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Rich G Carter
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
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10
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Davies SG, Fletcher AM, Thomson JE. Direct asymmetric syntheses of chiral aldehydes and ketones via N-acyl chiral auxiliary derivatives including chiral Weinreb amide equivalents. Chem Commun (Camb) 2014; 49:8586-98. [PMID: 23959006 DOI: 10.1039/c3cc45463k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This article covers N-acyl chiral auxiliary-based approaches to the asymmetric synthesis of enantiopure aldehydes and ketones. The use of diastereoisomerically pure N-acyl derivatives of chiral auxiliaries (including chiral Weinreb amide equivalents) and their conversion to the corresponding enantiopure aldehydes and ketones in a single synthetic operation by treatment with a hydride reducing agent or an organometallic reagent, respectively, are highlighted.
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Affiliation(s)
- Stephen G Davies
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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11
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Cai XC, Snider BB. Synthesis of the spiroiminal moiety and approaches to the synthesis of marineosins A and B. J Org Chem 2013; 78:12161-75. [PMID: 24199754 PMCID: PMC3885995 DOI: 10.1021/jo402178r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A short and efficient synthesis of model spiroiminals that have the same stereochemistry as marineosins A and B, but different conformations, was carried out in six or seven steps from 6-methyltetrahydropyran-2-one. These spiroiminals were also prepared biomimetically by reduction of an enol ether. A more highly substituted spiroiminal with the same stereochemistry and conformation as marineosin A was prepared in 11 steps from parasorbic acid. A macrocyclic pyrrole lactone was prepared stereospecifically in 10 steps. A five-step sequence converted the lactone to a late hemi-iminal intermediate that has resisted the methylation and spiroiminal formation that would lead to marineosin A.
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Affiliation(s)
- Xiao-Chuan Cai
- Department of Chemistry, MS 015, Brandeis University, Waltham, Massachusetts 02454-9110, United States
| | - Barry B. Snider
- Department of Chemistry, MS 015, Brandeis University, Waltham, Massachusetts 02454-9110, United States
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12
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Lu L, Zhang W, Nam S, Horne DA, Jove R, Carter RG. Amphidinolide B: total synthesis, structural investigation, and biological evaluation. J Org Chem 2013; 78:2213-47. [PMID: 23406192 PMCID: PMC3631602 DOI: 10.1021/jo3026077] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total syntheses of amphidinolide B1 and the proposed structure of amphidinolide B2 have been accomplished. Key aspects of this work include the development of a practical, non-transition-metal-mediated method for the construction of the C13-C15 diene, the identification of α-chelation and dipole minimization models for diastereoselective methyl ketone aldol reactions, the discovery of a spontaneous Horner-Wadsworth-Emmons macrocyclization strategy, and the development of a novel late stage method for construction of an allylic epoxide moiety. The originally proposed structure for amphidinolide B2 and diastereomers thereof display potent antitumor activities with IC50 values ranging from 3.3 to 94.5 nM against human solid and blood tumor cells. Of the different stereoisomers, the proposed structure of amphidinolide B2 is over 12-fold more potent than the C8,9-epimer and C18-epimer in human DU145 prostate cancer cells. These data suggest that the epoxide stereochemistry is a significant factor for anticancer activity.
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Affiliation(s)
- Liang Lu
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Wei Zhang
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Sangkil Nam
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - David A. Horne
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Richard Jove
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Rich G. Carter
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
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13
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Piątek AM, Sadowska A, Chapuis C, Jurczak J. Diastereoselective Alkyl Grignard 1,4-Additions to para-Substituted (2R)-N-Cinnamoylbornane-10,2-sultam Derivatives: Influence of N-Atom Pyramidalization. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201100197] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Shareef AR, Sherman DH, Montgomery J. Nickel-Catalyzed Regiodivergent Approach to Macrolide Motifs. Chem Sci 2011; 3:892-895. [PMID: 22737401 DOI: 10.1039/c2sc00866a] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A strategy for regiochemical reversal of reductive macrocyclizations of aldehydes and terminal alkynes has been developed. Using an advanced synthetic intermediate directed towards the methymycin/neomethymycin class of macrolides, selective endocyclization provides the natural twelve-membered ring series, whereas ligand alteration enables selective exocyclization to provide access to the unnatural eleven-membered ring series. The twelve-membered ring adduct was converted to 10-deoxymethynolide, completing an efficient total synthesis of this natural product.
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Affiliation(s)
- Abdur-Rafay Shareef
- Department of Chemistry, 930 N. University Ave. University of Michigan, Ann Arbor, MI 48109-1055
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15
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Son YW, Kwon TH, Lee JK, Pae AN, Lee JY, Cho YS, Min SJ. A Concise Synthesis of Tetrabenazine: An Intramolecular Aza-Prins-Type Cyclization via Oxidative C–H Activation. Org Lett 2011; 13:6500-3. [DOI: 10.1021/ol202792q] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Young Wook Son
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Tae Hui Kwon
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Jae Kyun Lee
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Ae Nim Pae
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Jae Yeol Lee
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Yong Seo Cho
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Sun-Joon Min
- Department of Chemistry, College of Sciences, Kyung Hee University, 1 Hoegi-Dong, Seoul 130-701, Republic of Korea, Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea, and School of Science, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
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16
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Sun Y, Gan J, Fan R. Facile Construction of Oxa-Aza Spirobicycles via a Tandem Carbon-Hydrogen Bond Oxidation. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100196] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Ocejo M, Carrillo L, Vicario JL, Badía D, Reyes E. Role of pseudoephedrine as chiral auxiliary in the "acetate-type" aldol reaction with chiral aldehydes; asymmetric synthesis of highly functionalized chiral building blocks. J Org Chem 2011; 76:460-70. [PMID: 21188970 DOI: 10.1021/jo101878j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We have studied in depth the aldol reaction between acetamide enolates and chiral α-heterosubstituted aldehydes using pseudoephedrine as chiral auxiliary under double stereodifferentiation conditions, showing that high diastereoselectivities can only be achieved under the matched combination of reagents and provided that the α-heteroatom-containing substituent of the chiral aldehyde is conveniently protected. Moreover, the obtained highly functionalized aldols have been employed as very useful starting materials for the stereocontrolled preparation of other interesting compounds and chiral building blocks such as pyrrolidines, indolizidines, and densely functionalized β-hydroxy and β-amino ketones using simple and high-yielding methodologies.
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Affiliation(s)
- Marta Ocejo
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea, P.O. Box 644, E-48080 Bilbao, Spain
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19
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Andrus MB, Wong Y, Liu J, Beebe K, Neckers LM. Synthesis and evaluation of 8,9-amido analogs of geldanamycin. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Synthesis of oxa-aza spirobicycles by intramolecular hydrogen atom transfer promoted by N-radicals in carbohydrate systems. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.05.049] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Evans DA, Kvaernø L, Dunn TB, Beauchemin A, Raymer B, Mulder JA, Olhava EJ, Juhl M, Kagechika K, Favor DA. Total synthesis of (+)-azaspiracid-1. An exhibition of the intricacies of complex molecule synthesis. J Am Chem Soc 2008; 130:16295-309. [PMID: 19006391 PMCID: PMC3408805 DOI: 10.1021/ja804659n] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of the marine neurotoxin azaspiracid-1 has been accomplished. The individual fragments were synthesized by catalytic enantioselective processes: A hetero-Diels-Alder reaction to afford the E- and HI-ring fragments, a carbonyl-ene reaction to furnish the CD-ring fragment, and a Mukaiyama aldol reaction to deliver the FG-ring fragment. The subsequent fragment couplings were accomplished by aldol and sulfone anion methodologies. All ketalization events to form the nonacyclic target were accomplished under equilibrating conditions utilizing the imbedded configurations of the molecule to adopt one favored conformation. A final fragment coupling of the anomeric EFGHI-sulfone anion to the ABCD-aldehyde completed the convergent synthesis of (+)-azaspiracid-1.
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Affiliation(s)
- David A Evans
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
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22
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Affiliation(s)
- Marie‐Eve Sinibaldi
- Laboratoire de Synthèse et Etude de Systèmes à Intérêt Biologique (SEESIB), UMR 6504, Université Blaise Pascal, 63177 Aubière Cedex, France, Fax: +33‐4‐73407717
| | - Isabelle Canet
- Laboratoire de Synthèse et Etude de Systèmes à Intérêt Biologique (SEESIB), UMR 6504, Université Blaise Pascal, 63177 Aubière Cedex, France, Fax: +33‐4‐73407717
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Lu L, Zhang W, Carter RG. Total synthesis of cytotoxic macrolide amphidinolide B1 and the proposed structure of amphidinolide B2. J Am Chem Soc 2008; 130:7253-5. [PMID: 18489095 PMCID: PMC2435505 DOI: 10.1021/ja803012n] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first enantioselective total syntheses of cytotoxic macrolide amphidinolide B1 and the proposed structure for amphidinolide B2 have been accomplished. Key features of the syntheses include a diastereoselective aldol condensation, a spontaneous Wadsworth-Emmons macrocyclization and a directed epoxidation/elimination sequence.
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Affiliation(s)
- Liang Lu
- Department of Chemistry, Oregon State UniVersity, 153 Gilbert Hall, CorVallis, Oregon 97331
| | - Wei Zhang
- Department of Chemistry, Oregon State UniVersity, 153 Gilbert Hall, CorVallis, Oregon 97331
| | - Rich G. Carter
- Department of Chemistry, Oregon State UniVersity, 153 Gilbert Hall, CorVallis, Oregon 97331
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Ruiz N, Vicario JL, Badía D, Carrillo L, Alonso B. (S,S)-(+)-Pseudoephedrine α-Iminoglyoxylamide as a Chiral Glycine Cation Equivalent: A Modular and Flexible Approach to Enantioenriched α-Amino Ketones. Org Lett 2008; 10:2613-6. [DOI: 10.1021/ol800934r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nerea Ruiz
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea, P.O. Box 644, 48080 Bilbao, Spain
| | - Jose L. Vicario
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea, P.O. Box 644, 48080 Bilbao, Spain
| | - Dolores Badía
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea, P.O. Box 644, 48080 Bilbao, Spain
| | - Luisa Carrillo
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea, P.O. Box 644, 48080 Bilbao, Spain
| | - Beatriz Alonso
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea, P.O. Box 644, 48080 Bilbao, Spain
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Evans D, Kværnø L, Mulder J, Raymer B, Dunn T, Beauchemin A, Olhava E, Juhl M, Kagechika K. Total Synthesis of (+)-Azaspiracid-1. Part I: Synthesis of the Fully Elaborated ABCD Aldehyde. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701515] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Evans DA, Kvaernø L, Mulder JA, Raymer B, Dunn TB, Beauchemin A, Olhava EJ, Juhl M, Kagechika K. Total Synthesis of (+)-Azaspiracid-1. Part I: Synthesis of the Fully Elaborated ABCD Aldehyde. Angew Chem Int Ed Engl 2007; 46:4693-7. [PMID: 17546577 DOI: 10.1002/anie.200701515] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- David A Evans
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
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28
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Imai M, Tanaka M, Nagumo S, Kawahara N, Suemune H. Nitrile-Promoted Rh-Catalyzed Intermolecular Hydroacylation of Olefins with Salicylaldehyde. J Org Chem 2007; 72:2543-6. [PMID: 17326687 DOI: 10.1021/jo062501u] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rh-catalyzed intermolecular hydroacylation between salicylaldehyde and alkenylnitriles proceeded at room temperature to preferentially give normal-hydroacylated products. Addition of CH3CN and NaOAc accelerated the Rh-catalyzed hydroacylation of monoolefins to exclusively produce the normal-hydroacylated products under mild reaction conditions. Plausible mechanisms for the regioselections are also described.
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Affiliation(s)
- Masanori Imai
- Hokkaido College of Pharmacy, Hokkaido 047-0264, Japan
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