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Bhamboo P, Bera S, Mondal D. TiCl
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‐Promoted Asymmetric Aldol Reaction of Oxazolidinones and its Sulphur‐Congeners for Natural Product Synthesis. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Prateek Bhamboo
- School of Chemical Sciences Central University of Gujarat Gandhinagar 382030 Gujarat India
| | - Smritilekha Bera
- School of Chemical Sciences Central University of Gujarat Gandhinagar 382030 Gujarat India
| | - Dhananjoy Mondal
- School of Chemical Sciences Central University of Gujarat Gandhinagar 382030 Gujarat India
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2
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Sikandar S, Zahoor AF, Naheed S, Parveen B, Ali KG, Akhtar R. Fukuyama reduction, Fukuyama coupling and Fukuyama-Mitsunobu alkylation: recent developments and synthetic applications. Mol Divers 2021; 26:589-628. [PMID: 33575984 DOI: 10.1007/s11030-021-10194-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/30/2021] [Indexed: 12/18/2022]
Abstract
Fukuyama reaction for the synthesis of multifunctional aldehydes, secondary amines and ketones has gained considerable importance in synthetic organic chemistry because of mild reaction conditions. The use of thioesters in both Fukuyama aldehydes and ketones synthesis is highly attractive for organic chemists as they are easily accessible from corresponding carboxylic acids. Fukuyama-Mitsunobu reaction utilizes 2-nitrobenzenesulfonyl (Ns) for the protection/activation/deprotection of primary amines to afford secondary amines in good yields and high enantioselectivities. This review presents recent synthetic developments and applications of Fukuyama reaction for the synthesis of aldehydes, secondary amines and ketones.
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Affiliation(s)
- Sana Sikandar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan.
| | - Shazia Naheed
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Bushra Parveen
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Kulsoom Ghulam Ali
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Rabia Akhtar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
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3
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Davies SG, Fletcher AM, Roberts PM, Thomson JE. SuperQuat chiral auxiliaries: design, synthesis, and utility. Org Biomol Chem 2019; 17:1322-1335. [DOI: 10.1039/c8ob02819b] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The design, synthesis and outline of some of the most common synthetic applications of the SuperQuat (4-substituted 5,5-dimethyloxazolidine-2-one) family of chiral auxiliaries, developed to address the shortcomings of the Evans (4-substituted oxazolidin-2-one) family of chiral auxiliaries, are presented.
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Affiliation(s)
- Stephen G. Davies
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Ai M. Fletcher
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Paul M. Roberts
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - James E. Thomson
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
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4
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Onozawa T, Kitajima M, Kogure N, Takayama H. Asymmetric Total Synthesis and Evaluation of Antitumor Activity of Ophiorrhisine A and Its Derivatives. J Org Chem 2018; 83:15312-15322. [DOI: 10.1021/acs.joc.8b02554] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Tadayoshi Onozawa
- Department of Biofunctional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Mariko Kitajima
- Department of Biofunctional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Noriyuki Kogure
- Department of Biofunctional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiromitsu Takayama
- Department of Biofunctional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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5
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New advances in the synthesis of tripyridinophane macrocycles suitable to enhance the luminescence of Ln(III) ions in aqueous solution. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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6
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Yu M, Lou S, Gonzalez-Bobes F. Ring-Closing Metathesis in Pharmaceutical Development: Fundamentals, Applications, and Future Directions. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00093] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Miao Yu
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903-0191, United States
| | - Sha Lou
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903-0191, United States
| | - Francisco Gonzalez-Bobes
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903-0191, United States
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7
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Synthesis of pyrano[3,4-c]pyrroles (microreview). Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2312-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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Takeuchi T, Kumagai N, Shibasaki M. Direct Catalytic Asymmetric Aldol Reaction of α-Vinyl Acetamide. J Org Chem 2018; 83:5851-5858. [DOI: 10.1021/acs.joc.8b00743] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Toshifumi Takeuchi
- Institute of Microbial Chemistry (BIKAKEN), Tokyo 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), Tokyo 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), Tokyo 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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9
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Lei H, Xin S, Qiu Y, Zhang X. Enantioselective total synthesis of (-)-kainic acid and (+)-acromelic acid C via Rh(i)-catalyzed asymmetric enyne cycloisomerization. Chem Commun (Camb) 2018; 54:727-730. [PMID: 29214245 DOI: 10.1039/c7cc07967b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A diversity-oriented synthetic strategy was developed for the total synthesis of kainoid amino acids, which led to the enantioselective synthesis of (-)-kainic acid and the first total synthesis of (+)-acromelic acid C. Rh(i)-catalyzed asymmetric enyne cycloisomerization served as the key reaction in this strategy for the rapid construction of highly functionalized lactam, and the resulting vinyl acetate moiety was further utilized as a versatile building block for the installation of both isopropylidene and 2-pyridone units existing in natural kainoids.
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Affiliation(s)
- Honghui Lei
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
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10
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Chen P, Wu Y, Zhu S, Jiang H, Ma Z. Ir-Catalyzed reactions in natural product synthesis. Org Chem Front 2018. [DOI: 10.1039/c7qo00665a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review highlights the recent applications of Ir-catalyzed reactions in the total synthesis of natural products.
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Affiliation(s)
- Pengquan Chen
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Yuecheng Wu
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Shifa Zhu
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Zhiqiang Ma
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
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11
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Takahashi K, Ito T, Yamada W, Tsubuki M, Honda T. A Formal Synthesis of (–)-Kainic Acid by Means of SmI2-Mediated Radical Cyclization. HETEROCYCLES 2018. [DOI: 10.3987/com-18-13898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Suzuki J, Miyano N, Yashiro S, Umezawa T, Matsuda F. Total synthesis of (-)-kainic acid and (+)-allo-kainic acid through SmI 2-mediated intramolecular coupling between allyl chloride and an α,β-unsaturated ester. Org Biomol Chem 2017; 15:6557-6566. [PMID: 28748237 DOI: 10.1039/c7ob01427a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A 3,4-disubstituted pyrrolidine ring was effectively cyclized through SmI2-mediated reductive coupling between allyl chloride and an α,β-unsaturated ester, although little has been reported about SmI2-promoted C-C bond formation of an allyl chloride with an α,β-unsaturated ester. Selection of either the 3,4-cis- or 3,4-trans-selective cyclization can be accomplished simply by changing the additives from NiI2 to HMPA during reductive cyclization conducted in H2O-THF. Total synthesis of (-)-kainic acid and (+)-allo-kainic acid, which are pyrrolidine alkaloids used in neuroscience and neuropharmacology as useful molecular probes, was successfully achieved by using the stereo-complementary ring closure reactions promoted by SmI2 for the construction of the 2,3,4-trisubsituted pyrrolidine scaffold of kainoids.
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Affiliation(s)
- Junya Suzuki
- Graduate School of Environmental Science, Hokkaido University, N10 W5, Sapporo 060-0810, Japan.
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13
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Yamada R, Adachi Y, Yokoshima S, Fukuyama T. Total Synthesis of (−)‐Daphenylline. Angew Chem Int Ed Engl 2016; 55:6067-70. [DOI: 10.1002/anie.201601958] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Ryosuke Yamada
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Yohei Adachi
- Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
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14
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Yamada R, Adachi Y, Yokoshima S, Fukuyama T. Total Synthesis of (−)‐Daphenylline. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601958] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ryosuke Yamada
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Yohei Adachi
- Graduate School of Pharmaceutical Sciences University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
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15
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Gunal SE, Gurses GS, Erdem SS, Dogan I. Synthesis of stable tetrahedral intermediates (hemiaminals) and kinetics of their conversion to thiazol-2-imines. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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17
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Enantio- and diastereoselective synthesis of syn -β-hydroxy-α-alkenyl carboxamides via reductive aldol reactions of morpholine 4-methyl-2,3-pentadienoic carboxamide with diisopinocampheylborane. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Li J, Ballmer SG, Gillis EP, Fujii S, Schmidt MJ, Palazzolo AME, Lehmann JW, Morehouse GF, Burke MD. Synthesis of many different types of organic small molecules using one automated process. Science 2015; 347:1221-6. [PMID: 25766227 DOI: 10.1126/science.aaa5414] [Citation(s) in RCA: 336] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Small-molecule synthesis usually relies on procedures that are highly customized for each target. A broadly applicable automated process could greatly increase the accessibility of this class of compounds to enable investigations of their practical potential. Here we report the synthesis of 14 distinct classes of small molecules using the same fully automated process. This was achieved by strategically expanding the scope of a building block-based synthesis platform to include even C(sp3)-rich polycyclic natural product frameworks and discovering a catch-and-release chromatographic purification protocol applicable to all of the corresponding intermediates. With thousands of compatible building blocks already commercially available, many small molecules are now accessible with this platform. More broadly, these findings illuminate an actionable roadmap to a more general and automated approach for small-molecule synthesis.
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Affiliation(s)
- Junqi Li
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Steven G Ballmer
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Eric P Gillis
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Seiko Fujii
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Michael J Schmidt
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Andrea M E Palazzolo
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jonathan W Lehmann
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Greg F Morehouse
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Martin D Burke
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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Zhang M, Watanabe K, Tsukamoto M, Shibuya R, Morimoto H, Ohshima T. A Short Scalable Route to (−)-α-Kainic Acid Using Pt-Catalyzed Direct Allylic Amination. Chemistry 2015; 21:3937-41. [DOI: 10.1002/chem.201406557] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Indexed: 01/11/2023]
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20
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Yodwaree S, Soorukram D, Kuhakarn C, Tuchinda P, Reutrakul V, Pohmakotr M. Formal synthesis of (+)-3-epi-eupomatilone-6 and the 3,5-bis-epimer. Org Biomol Chem 2014; 12:6885-94. [DOI: 10.1039/c4ob01078g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Structure–activity relationships of the truncated norzoanthamines exhibiting collagen protection toward anti-osteoporotic activity. Bioorg Med Chem 2014; 22:3455-64. [DOI: 10.1016/j.bmc.2014.04.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/17/2014] [Accepted: 04/18/2014] [Indexed: 11/17/2022]
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22
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Abstract
A short total synthesis of (-)-kainic acid has been developed involving a novel diastereofacial differentiating Cu-catalyzed Michael addition-cyclization reaction, which provided access to a chiral pyrroline in a highly stereoselective manner. The chiral pyrroline was converted to (-)-kainic acid via the stereoselective 1,4-reduction of the pyrroline double bond in three steps.
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Affiliation(s)
- Kentaro Oe
- Graduate School of Science, Osaka City University , Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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Williams DR, Mondal PK, Bawel SA, Nag PP. Stereocontrolled Synthesis of the Tricyclic ABC Ring System of Daphnicyclidin A. Org Lett 2014; 16:1956-9. [DOI: 10.1021/ol5005092] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- David R. Williams
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Prolay K. Mondal
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Seth A. Bawel
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Partha P. Nag
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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24
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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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25
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Affiliation(s)
- Satoshi Umezaki
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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26
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Belmessieri D, Cordes DB, Slawin AMZ, Smith AD. Telescoped Synthesis of Stereodefined Pyrrolidines. Org Lett 2013; 15:3472-5. [DOI: 10.1021/ol401554y] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Dorine Belmessieri
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - David B. Cordes
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
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27
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Kitamoto K, Nakayama Y, Sampei M, Ichiki M, Furuya N, Sato T, Chida N. Chirality Transfers through Sequential Sigmatropic Rearrangements of Allylic Vicinal Diols: Development and Application to Total Synthesis of (-)-Kainic Acid. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200523] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Orellana A, Pandey SK, Carret S, Greene AE, Poisson JF. A Diels–Alder-Based Total Synthesis of (−)-Kainic Acid. J Org Chem 2012; 77:5286-96. [DOI: 10.1021/jo300608g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arturo Orellana
- Département de Chimie Moléculaire (SERCO)
CNRS, UMR-5250, ICMG FR-2607, Université Joseph Fourier BP-53, 38041 Grenoble Cedex 9, France
| | - Sushil K. Pandey
- Département de Chimie Moléculaire (SERCO)
CNRS, UMR-5250, ICMG FR-2607, Université Joseph Fourier BP-53, 38041 Grenoble Cedex 9, France
| | - Sébastien Carret
- Département de Chimie Moléculaire (SERCO)
CNRS, UMR-5250, ICMG FR-2607, Université Joseph Fourier BP-53, 38041 Grenoble Cedex 9, France
| | - Andrew E. Greene
- Département de Chimie Moléculaire (SERCO)
CNRS, UMR-5250, ICMG FR-2607, Université Joseph Fourier BP-53, 38041 Grenoble Cedex 9, France
| | - Jean-François Poisson
- Département de Chimie Moléculaire (SERCO)
CNRS, UMR-5250, ICMG FR-2607, Université Joseph Fourier BP-53, 38041 Grenoble Cedex 9, France
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30
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Jo KA, Maheswara M, Yoon E, Lee YY, Yun H, Kang EJ. N-Heterocyclic Carbene Catalyzed Domino Cyclization of Propargylic Alcohols and Benzoyl Isocyanates. J Org Chem 2012; 77:2924-8. [DOI: 10.1021/jo202102y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyoung A Jo
- Department of Applied Chemistry, Kyung Hee University, Yongin 446-701, Korea
| | | | - Eunyoung Yoon
- Department of Applied Chemistry, Kyung Hee University, Yongin 446-701, Korea
| | - Yun Yeong Lee
- Department of Applied Chemistry, Kyung Hee University, Yongin 446-701, Korea
| | - Hoseop Yun
- Division of Energy Systems Research
and Department of Chemistry, Ajou University, Suwon 443-749, Korea
| | - Eun Joo Kang
- Department of Applied Chemistry, Kyung Hee University, Yongin 446-701, Korea
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31
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Hosoi H, Kawai N, Hagiwara H, Suzuki T, Nakazaki A, Takao KI, Umezawa K, Kobayashi S. Determination of the Absolute Structure of (+)-Akaterpin. Chem Pharm Bull (Tokyo) 2012; 60:137-43. [DOI: 10.1248/cpb.60.137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Hayato Hosoi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science (RIKADAI), 2641 Yamazaki, Noda, Chiba 278- 8510, Japan
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32
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Felluga F, Forzato C, Nitti P, Pitacco G, Ghelfi F, Valentin E. First chemoenzymatic synthesis of (+)-2-carboxypyrrolidine-3-acetic acid, the nucleus of kainoid amino acids. Chirality 2011; 24:112-8. [PMID: 22180179 DOI: 10.1002/chir.21032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 09/08/2011] [Indexed: 11/12/2022]
Abstract
The distinctive nucleus of kainoid amino acids, (2S,3R)-(+)-2-carboxypyrrolidine-3-acetic acid 6, was synthesized by a chemoenzymatic process, exploiting the diastereomeric cis/trans methyl pyroglutamate derivatives 10a-c/11a-c as key intermediates. These mixtures, when subjected to a kinetic resolution mediated by α-chymotrypsin, reacted diastereo-, regio-, and enantioselectively to give the trans derivatives (+)-10a-c possessing the correct (2S,3R) configuration. Subsequently, the desired product (2S,3R)-(+)-6 could be obtained after well-established transformations.
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Affiliation(s)
- Fulvia Felluga
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy.
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33
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Paudel A, Hamamoto H, Kobayashi Y, Yokoshima S, Fukuyama T, Sekimizu K. Identification of novel deoxyribofuranosyl indole antimicrobial agents. J Antibiot (Tokyo) 2011; 65:53-7. [DOI: 10.1038/ja.2011.110] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Synthesis and determination of the relative structure of akaterpin, a potent inhibitor of PI-PLC. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Wei G, Chalker JM, Cohen T. Synthesis of (−)-α-Kainic Acid via TMSCl-Promoted Pd-Catalyzed Zinc-ene Cyclization of an Allyl Acetate. J Org Chem 2011; 76:7912-7. [DOI: 10.1021/jo201341q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guoqing Wei
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Justin M. Chalker
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Theodore Cohen
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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36
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Cakmak M, Mayer P, Trauner D. An efficient synthesis of loline alkaloids. Nat Chem 2011; 3:543-5. [DOI: 10.1038/nchem.1072] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 05/17/2011] [Indexed: 11/09/2022]
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37
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Lowe MA, Ostovar M, Ferrini S, Chen CC, Lawrence PG, Fontana F, Calabrese AA, Aggarwal VK. Palladium-Mediated Annulation of Vinyl Aziridines with Michael Acceptors: Stereocontrolled Synthesis of Substituted Pyrrolidines and Its Application in a Formal Synthesis of (−)-α-Kainic Acid. Angew Chem Int Ed Engl 2011; 50:6370-4. [DOI: 10.1002/anie.201101389] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 04/18/2011] [Indexed: 11/10/2022]
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38
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Lowe MA, Ostovar M, Ferrini S, Chen CC, Lawrence PG, Fontana F, Calabrese AA, Aggarwal VK. Palladium-Mediated Annulation of Vinyl Aziridines with Michael Acceptors: Stereocontrolled Synthesis of Substituted Pyrrolidines and Its Application in a Formal Synthesis of (−)-α-Kainic Acid. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101389] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Kamon T, Irifune Y, Tanaka T, Yoshimitsu T. Total Synthesis of (±)-Kainic Acid: A Photochemical C–H Carbamoylation Approach. Org Lett 2011; 13:2674-7. [DOI: 10.1021/ol200772f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takuma Kamon
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yayoi Irifune
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tetsuaki Tanaka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takehiko Yoshimitsu
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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40
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Affiliation(s)
- Satoshi Takita
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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41
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Higashi T, Isobe Y, Ouchi H, Suzuki H, Okazaki Y, Asakawa T, Furuta T, Wakimoto T, Kan T. Stereocontrolled Synthesis of (+)-Methoxyphenylkainic Acid and (+)-Phenylkainic Acid. Org Lett 2011; 13:1089-91. [DOI: 10.1021/ol103131p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takumi Higashi
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yoichiro Isobe
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Hitoshi Ouchi
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Hiroto Suzuki
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuko Okazaki
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Tomohiro Asakawa
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Takumi Furuta
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Toshiyuki Wakimoto
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Toshiyuki Kan
- School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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42
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Farwick A, Engelhart JU, Tverskoy O, Welter C, Umlauf née Stang QA, Rominger F, Kerr WJ, Helmchen G. Bicyclic Cyclopentenones via the Combination of an Iridium- Catalyzed Allylic Substitution with a Diastereoselective Intramolecular Pauson-Khand Reaction. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000706] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Kitamoto K, Sampei M, Nakayama Y, Sato T, Chida N. Novel Sequential Sigmatropic Rearrangements of Allylic Diols: Application to the Total Synthesis of (−)-Kainic Acid. Org Lett 2010; 12:5756-9. [DOI: 10.1021/ol1026602] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katsunori Kitamoto
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Mana Sampei
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yasuaki Nakayama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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44
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Davies SG, Fletcher AM, Kurosawa W, Lee JA, Poce G, Roberts PM, Thomson JE, Williamson DM. One-Pot Conversions of Olefins to Cyclic Carbonates and Secondary Allylic and Homoallylic Amines to Cyclic Carbamates. J Org Chem 2010; 75:7745-56. [DOI: 10.1021/jo101614f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen G. Davies
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Ai M. Fletcher
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Wataru Kurosawa
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - James A. Lee
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Giovanna Poce
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Paul M. Roberts
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - James E. Thomson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - David M. Williamson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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45
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Intramolecular hydrogen bond stabilization of hemiaminal structures, precursors of imidazo[1,2-a]pyridine. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.05.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Szostak M, Yao L, Aubé J. Proximity effects in nucleophilic addition reactions to medium-bridged twisted lactams: remarkably stable tetrahedral intermediates. J Am Chem Soc 2010; 132:2078-84. [PMID: 20095610 PMCID: PMC2820158 DOI: 10.1021/ja909792h] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions of a series of strained bicyclic and tricyclic one-carbon bridged lactams with organometallic reagents have been investigated. These amides permit isolation of a number of remarkably stable hemiaminals upon nucleophilic addition to the twisted amide bonds present in the lactam precursors. The factors that affect the stability of the resulting bridged hemiaminals are presented. In some cases, the hemiaminals were found to collapse to the open-form amino ketones in a manner expected for traditional carboxylic acid derivatives. Transannular N...C=O interactions were also observed in some nine-membered amino ketones. Additionally, tricyclic bridged lactams were found to react with some nucleophiles that typically react with ketones but not with planar amides. The effect of geometry on the reactivity of amide bonds and the amide bond distortion range that marks the boundary of amide-like and ketone-like carbonyl reactivity of lactams are also discussed.
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Affiliation(s)
- Michal Szostak
- Department of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Malott Hall, Room 4070, Lawrence, Kansas 66045-7852
| | - Lei Yao
- Department of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Malott Hall, Room 4070, Lawrence, Kansas 66045-7852
| | - Jeffrey Aubé
- Department of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Malott Hall, Room 4070, Lawrence, Kansas 66045-7852
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47
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Farwick A, Helmchen G. Enantioselective Total Synthesis of (−)-α-Kainic Acid. Org Lett 2010; 12:1108-11. [DOI: 10.1021/ol1001076] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Farwick
- Organisch-Chemisches Institut der Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | - Günter Helmchen
- Organisch-Chemisches Institut der Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
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48
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Airiau E, Spangenberg T, Girard N, Breit B, Mann A. Short Access to (+)-Lupinine and (+)-Epiquinamide via Double Hydroformylation. Org Lett 2009; 12:528-31. [DOI: 10.1021/ol902718q] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Etienne Airiau
- Faculté de Pharmacie, UMR 7200, CNRS-Université de Strasbourg, Laboratoire d’Innovation Thérapeutique, 74 route du Rhin, F-67401 Illkirch, France, and Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
| | - Thomas Spangenberg
- Faculté de Pharmacie, UMR 7200, CNRS-Université de Strasbourg, Laboratoire d’Innovation Thérapeutique, 74 route du Rhin, F-67401 Illkirch, France, and Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
| | - Nicolas Girard
- Faculté de Pharmacie, UMR 7200, CNRS-Université de Strasbourg, Laboratoire d’Innovation Thérapeutique, 74 route du Rhin, F-67401 Illkirch, France, and Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
| | - Bernhard Breit
- Faculté de Pharmacie, UMR 7200, CNRS-Université de Strasbourg, Laboratoire d’Innovation Thérapeutique, 74 route du Rhin, F-67401 Illkirch, France, and Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
| | - André Mann
- Faculté de Pharmacie, UMR 7200, CNRS-Université de Strasbourg, Laboratoire d’Innovation Thérapeutique, 74 route du Rhin, F-67401 Illkirch, France, and Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
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49
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Enkisch C, Schneider C. Sequential Mannich-Aza-Michael Reactions for the Stereodivergent Synthesis of Highly Substituted Pyrrolidines. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900787] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Davies SG, Elend DL, Jones S, Roberts PM, Savory ED, Smith AD, Thomson JE. The dienolate aldol reaction of (E)-N-crotonoyl C(4)-isopropyl SuperQuat: asymmetric synthesis of α-vinyl-β-hydroxycarboxylic acid derivatives and conversion to α-ethylidene-β-hydroxyesters (β-substituted Baylis–Hillman products). Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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