1
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Rossouw NP, Chen Z, White JM, Rizzacasa MA. Synthesis of More Highly Oxidized Alkyl Citrates via Direct Regio- and Stereoselective Oxidation. Org Lett 2023; 25:8010-8015. [PMID: 37916764 DOI: 10.1021/acs.orglett.3c03232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
An approach to more highly oxidized alkyl citrates by direct regio- and stereoselective oxidations is reported. The total synthesis and structural assignment of alkyl citrate L-731-128 are described, and the synthesis of its C4 oxidized congener L-731,127 utilized a regio- and stereoselective enolate oxidation with oxygen gas. A highly stereoselective Rubottom oxidation of a cyclic silylketene acetal then enabled oxidation at C2 to afford the cinatrins C1 and C3.
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Affiliation(s)
- Nikolai P Rossouw
- School of Chemistry, The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Zongjia Chen
- School of Chemistry, The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Jonathan M White
- School of Chemistry, The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Mark A Rizzacasa
- School of Chemistry, The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
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2
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Abstract
Efficient four- and five-step routes to access functionalized bicyclo[3.2.1]oct-2-ene and bicyclo[3.3.1]nonadiene via indium-mediated cycloisomerization of 1,6-enynes has been developed. This atom-economical catalytic process was optimized and relied on the efficiency of InCl3 leading to the preparation of functionalized bicyclic adducts in up to 99% isolated yield. The cyclization occurred on two different processes (5-exo versus 6-endo pathway) and were influenced by the substitution of the alkynyl moiety. The exo process was favored for non-substituted alkynes whereas the endo pathway was generally observed for substituted alkynes. Then, the presence of electron-withdrawing groups on the aryl substituted alkyne increased the ratio of the exo isomer. DFT calculations were performed on stability of intermediates and corroborated the intervention of InCl3.
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3
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Baeyer-Villiger-Including Domino Two-Step Oxidations of β-O-Substituted Primary Alcohols: Reflection of the Migratory Aptitudes of O-Substituted Alkyl Group in the Outcome of the Reaction. Catalysts 2020. [DOI: 10.3390/catal10111275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Following the recent development of the one-pot two-step oxidation protocol for primary β-alkoxy alcohols, additional primary β-oxy alcohols were examined under similar conditions. The outcome of these reactions closely follows the migratory aptitudes of the related α-oxy-alkyls in Baeyer-Villiger oxidation vs. that of hydrogen. Thus, these experiments helped to establish the correct order of these aptitudes for α-oxy-alkyls. Furthermore, in the case of primary β,β-dialkoxyalcohols, the formation of dialkoxymethyl formates by the domino oxidation reaction was followed by secondary reactions, forming a number of interesting products.
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4
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Peng C, Arya P, Zhou Z, Snyder SA. A Concise Total Synthesis of (+)-Waihoensene Guided by Quaternary Center Analysis. Angew Chem Int Ed Engl 2020; 59:13521-13525. [PMID: 32330370 PMCID: PMC7906115 DOI: 10.1002/anie.202004177] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Indexed: 11/07/2022]
Abstract
The four contiguous all-carbon quaternary centers of waihoensene, coupled with the absence of any traditional reactive functional groups other than a single alkene, render it a particularly challenging synthetic target among angular triquinane natural products. Here, we show that its polycyclic frame can be assembled concisely by using a strategically chosen quaternary center to guide the formation of the other three through judiciously selected C-C bond formation reactions. Those events, which included a unique Conia-ene cyclization and a challenging Pauson-Khand reaction, afforded a 17-step synthesis of the molecule in enantioenriched form.
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Affiliation(s)
- Cheng Peng
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Piyush Arya
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Zhiyao Zhou
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
| | - Scott A Snyder
- Department of Chemistry, University of Chicago, 5735 S. Ellis Avenue, Chicago, IL, 60637, USA
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5
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Peng C, Arya P, Zhou Z, Snyder SA. A Concise Total Synthesis of (+)‐Waihoensene Guided by Quaternary Center Analysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004177] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cheng Peng
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Piyush Arya
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Zhiyao Zhou
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Scott A. Snyder
- Department of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
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6
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Sahu AK, Unnava R, Shit S, Saikia AK. In(OTf) 3-Catalyzed One-Pot Tandem Mannich and Conia-Ene Cyclization Reaction of N-Propargyl Amido Alcohols with 1,3-Dicarbonyl Compounds: An Approach To Construct Tetrahydro-1 H-pyrrolo[2,1- a]isoindolone-1,1-dicarboxylate and Its Application. J Org Chem 2020; 85:1961-1971. [PMID: 31912735 DOI: 10.1021/acs.joc.9b02686] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A one-pot tandem reaction has been developed for the synthesis of substituted tetrahydropyrroloisoindolone via Mannich reaction of N-propargyl amido alcohols with 1,3-dicarbonyl compounds followed by Conia-ene cyclization reaction in moderate to good yields catalyzed by indium(III)triflate [In(OTf)3]. The reaction is highly regioselective with an exo-cyclic double bond in the pyrrolidine ring. The substituted tetrahydropyrroloisoindolone can be converted to 5H-pyrrolo[2,1-a]isoindol-5-one via decarboxylative aromatization reaction.
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Affiliation(s)
- Archana Kumari Sahu
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Ramanjaneyulu Unnava
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Sudip Shit
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Anil K Saikia
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
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7
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Kawanishi S, Oki S, Kundu D, Akai S. Lipase/Oxovanadium Co-Catalyzed Dynamic Kinetic Resolution of Propargyl Alcohols: Competition between Racemization and Rearrangement. Org Lett 2019; 21:2978-2982. [DOI: 10.1021/acs.orglett.9b00334] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shinji Kawanishi
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka 1-6, Suita, Osaka 565-0871, Japan
| | - Shinya Oki
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka 1-6, Suita, Osaka 565-0871, Japan
| | - Dhiman Kundu
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka 1-6, Suita, Osaka 565-0871, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka 1-6, Suita, Osaka 565-0871, Japan
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8
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Recent examples of the use of biocatalysts with high accessibility and availability in natural product synthesis. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.053] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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Targel T, Ramesh P, Portnoy M. Domino Two-Step Oxidation of β-Alkoxy Alcohols to Hemiacetal Esters: Linking a Stoichiometric Step to an Organocatalytic Step with a Common Organic Oxidant. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800380] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Tom Targel
- School of Chemistry; Tel Aviv University; 6997801 Tel Aviv Israel
| | - Palakuri Ramesh
- School of Chemistry; Tel Aviv University; 6997801 Tel Aviv Israel
| | - Moshe Portnoy
- School of Chemistry; Tel Aviv University; 6997801 Tel Aviv Israel
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10
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Pérez Sestelo J, Sarandeses LA, Martínez MM, Alonso-Marañón L. Indium(iii) as π-acid catalyst for the electrophilic activation of carbon–carbon unsaturated systems. Org Biomol Chem 2018; 16:5733-5747. [DOI: 10.1039/c8ob01426d] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review focuses on indium(iii) as a π-acid for the activation of C–C unsaturated systems (alkynes, alkenes, and allenes) in organic synthesis.
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Affiliation(s)
- José Pérez Sestelo
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- E-15071 A Coruña
- Spain
| | - Luis A. Sarandeses
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- E-15071 A Coruña
- Spain
| | - M. Montserrat Martínez
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- E-15071 A Coruña
- Spain
| | - Lorena Alonso-Marañón
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- E-15071 A Coruña
- Spain
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11
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Yakura T, Nambu H, Fujiwara T. Development of Novel Catalytic System, Iodoarene-Oxone<sup>®</sup>, on Hypervalent Iodine Oxidation of Phenols and Alcohols. J SYN ORG CHEM JPN 2017. [DOI: 10.5059/yukigoseikyokaishi.75.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takayuki Yakura
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
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12
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Hunter AC, Schlitzer SC, Sharma I. Synergistic Diazo-OH Insertion/Conia-Ene Cascade Catalysis for the Stereoselective Synthesis ofγ-Butyrolactones and Tetrahydrofurans. Chemistry 2016; 22:16062-16065. [DOI: 10.1002/chem.201603934] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Arianne C. Hunter
- Department of Chemistry and Biochemistry, and; Institute of Natural Products Applications and Research Technologies; University of Oklahoma; 101 Stephenson Parkway Norman OK 73071 USA
| | - Steven C. Schlitzer
- Department of Chemistry and Biochemistry, and; Institute of Natural Products Applications and Research Technologies; University of Oklahoma; 101 Stephenson Parkway Norman OK 73071 USA
| | - Indrajeet Sharma
- Department of Chemistry and Biochemistry, and; Institute of Natural Products Applications and Research Technologies; University of Oklahoma; 101 Stephenson Parkway Norman OK 73071 USA
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13
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Yakura T, Horiuchi Y, Nishimura Y, Yamada A, Nambu H, Fujiwara T. Efficient Oxidative Cleavage of Tetrahydrofuran-2-methanols to γ-Lactones by a 2-Iodobenzamide Catalyst in Combination with Oxone®. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500795] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Yamazaki S, Wada J, Kakiuchi K. Stereospecific cyclization reaction of alkenyl esters and amides of ethenetricarboxylate. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The stereospecificity of the cyclization reaction of (E)- and (Z)-2-alkenyl esters and amides of ethenetricarboxylate has been examined. The reaction of (E)/(Z)-2-butenyl esters with AlCl3 or FeCl3 gave trans-substituted chlorinated γ-lactone diastereomers stereospecifically. (E)/(Z)-2-butenyl and pentenyl amides undergo an intramolecular ene reaction at room temperature gradually. At 80 °C, the (Z)-alkenyl amides were transformed to cis-substituted ene adducts and the (E)-amides were transformed to cis- and trans-substituted ene adduct mixtures. The reaction of (E)/(Z)-2-alkenyl amides with ZnI2 gave trans-substituted γ-lactam diastereomers stereospecifically along with the ene adducts.
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Affiliation(s)
- Shoko Yamazaki
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Junya Wada
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Kiyomi Kakiuchi
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Takayama, Ikoma, Nara 630-0192, Japan
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15
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Hack D, Blümel M, Chauhan P, Philipps AR, Enders D. Catalytic Conia-ene and related reactions. Chem Soc Rev 2015; 44:6059-93. [PMID: 26031492 DOI: 10.1039/c5cs00097a] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Since its initial inception, the Conia-ene reaction, known as the intramolecular addition of enols to alkynes or alkenes, has experienced a tremendous development and appealing catalytic protocols have emerged. This review fathoms the underlying mechanistic principles rationalizing how substrate design, substrate activation, and the nature of the catalyst work hand in hand for the efficient synthesis of carbocycles and heterocycles at mild reaction conditions. Nowadays, Conia-ene reactions can be found as part of tandem reactions, and the road for asymmetric versions has already been paved. Based on their broad applicability, Conia-ene reactions have turned into a highly appreciated synthetic tool with impressive examples in natural product synthesis reported in recent years.
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Affiliation(s)
- Daniel Hack
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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16
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Li Z, Sharma UK, Liu Z, Sharma N, Harvey JN, Van der Eycken EV. Diversity-Oriented Synthesis of β-Lactams and γ-Lactams by Post-Ugi Nucleophilic Cyclization: Lewis Acids as Regioselective Switch. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500270] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Chany AC, Marx LB, Burton JW. Synthesis of bicyclic tetrahydrofurans from linear precursors using manganese(iii) acetate. Org Biomol Chem 2015; 13:9190-3. [DOI: 10.1039/c5ob01091h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclisation of a range of alkoxy-malonates in the presence of manganese(iii) acetate gives rise to bicyclic lactone/THFs and lactone/lactones in synthetically useful yields and diastereoselectivities.
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Affiliation(s)
| | - Léo B. Marx
- Department of Chemistry
- Chemistry Research Laboratory
- Oxford
- UK
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18
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Ishihara J, Hatakeyama S. Total Synthesis of Oxazolomycins. CHEM REC 2014; 14:663-77. [DOI: 10.1002/tcr.201402009] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 01/22/2023]
Affiliation(s)
- Jun Ishihara
- Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki 852-8521 Japan
| | - Susumi Hatakeyama
- Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki 852-8521 Japan
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19
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Urabe F, Miyamoto S, Takahashi K, Ishihara J, Hatakeyama S. Formal [4 + 1]-Cycloaddition of Homopropargyl Alcohols to Diazo Dicarbonyl Compounds Giving Substituted Tetrahydrofurans. Org Lett 2014; 16:1004-7. [DOI: 10.1021/ol403746r] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Fumiya Urabe
- Graduate School of Biomedical
Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Shohei Miyamoto
- Graduate School of Biomedical
Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Keisuke Takahashi
- Graduate School of Biomedical
Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Jun Ishihara
- Graduate School of Biomedical
Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Susumi Hatakeyama
- Graduate School of Biomedical
Sciences, Nagasaki University, Nagasaki 852-8521, Japan
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20
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Hatakeyama S. Total Synthesis of Biologically Active Natural Products Based on Highly Selective Synthetic Methodologies. Chem Pharm Bull (Tokyo) 2014; 62:1045-61. [DOI: 10.1248/cpb.c14-00474] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Susumi Hatakeyama
- Graduate School of Biomedical Sciences, Nagasaki University, 1–14 Bunkyo-machi, Nagasaki 852–8521, Japan
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21
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Rizzacasa MA, Sturgess D. Total synthesis of alkyl citrate natural products. Org Biomol Chem 2014; 12:1367-82. [DOI: 10.1039/c3ob42231c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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22
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Boominathan SSK, Hu W, Senadi GC, Wang J. Silver(I)‐Catalyzed Conia‐Ene Reaction: Synthesis of 3‐Pyrrolines
via
a 5‐
endo
‐
dig
Cyclization. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300844] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Wan‐Ping Hu
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung City 807, Taiwan
| | - Gopal Chandru Senadi
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung City 807, Taiwan
| | - Jeh‐Jeng Wang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung City 807, Taiwan
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