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Carruthers DN, Kim J, Mendez-Perez D, Monroe E, Myllenbeck N, Liu Y, Davis RW, Sundstrom E, Lee TS. Microbial production of high octane and high sensitivity olefinic ester biofuels. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:60. [PMID: 37016410 PMCID: PMC10071710 DOI: 10.1186/s13068-023-02301-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/08/2023] [Indexed: 04/06/2023]
Abstract
BACKGROUND Advanced spark ignition engines require high performance fuels with improved resistance to autoignition. Biologically derived olefinic alcohols have arisen as promising blendstock candidates due to favorable octane numbers and synergistic blending characteristics. However, production and downstream separation of these alcohols are limited by their intrinsic toxicity and high aqueous solubility, respectively. Bioproduction of carboxylate esters of alcohols can improve partitioning and reduce toxicity, but in practice has been limited to saturated esters with characteristically low octane sensitivity. If olefinic esters retain the synergistic blending characteristics of their alcohol counterparts, they could improve the bioblendstock combustion performance while also retaining the production advantages of the ester moiety. RESULTS Optimization of Escherichia coli isoprenoid pathways has led to high titers of isoprenol and prenol, which are not only excellent standalone biofuel and blend candidates, but also novel targets for esterification. Here, a selection of olefinic esters enhanced blendstock performance according to their degree of unsaturation and branching. E. coli strains harboring optimized mevalonate pathways, thioester pathways, and heterologous alcohol acyltransferases (ATF1, ATF2, and SAAT) were engineered for the bioproduction of four novel olefinic esters. Although prenyl and isoprenyl lactate titers were limited to 1.48 ± 0.41 mg/L and 5.57 ± 1.36 mg/L, strains engineered for prenyl and isoprenyl acetate attained titers of 176.3 ± 16.0 mg/L and 3.08 ± 0.27 g/L, respectively. Furthermore, prenyl acetate (20% bRON = 125.8) and isoprenyl acetate (20% bRON = 108.4) exhibited blend properties comparable to ethanol and significantly better than any saturated ester. By further scaling cultures to a 2-L bioreactor under fed-batch conditions, 15.0 ± 0.9 g/L isoprenyl acetate was achieved on minimal medium. Metabolic engineering of acetate pathway flux further improved titer to attain an unprecedented 28.0 ± 1.0 g/L isoprenyl acetate, accounting for 75.7% theoretical yield from glucose. CONCLUSION Our study demonstrated novel bioproduction of four isoprenoid oxygenates for fuel blending. Our optimized E. coli production strain generated an unprecedented titer of isoprenyl acetate and when paired with its favorable blend properties, may enable rapid scale-up of olefinic alcohol esters for use as a fuel blend additive or as a precursor for longer-chain biofuels and biochemicals.
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Affiliation(s)
- David N Carruthers
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA, 94608, USA
| | - Jinho Kim
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA, 94608, USA
| | - Daniel Mendez-Perez
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA, 94608, USA
| | - Eric Monroe
- Sandia National Laboratories, Livermore, CA, 94551, USA
| | | | - Yuzhong Liu
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA, 94608, USA
| | - Ryan W Davis
- Sandia National Laboratories, Livermore, CA, 94551, USA
| | - Eric Sundstrom
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Advanced Biofuels and Bioproducts Process Development Unit, Emeryville, CA, 94608, USA
| | - Taek Soon Lee
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
- Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA, 94608, USA.
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Zheng K, Hong R. Total synthesis of LC-KA05, the proposed structure of LC-KA05-2, and 2,18-seco-lankacidinol B: A quest to revisit lankacidin biosynthesis. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Kaur N, Devi M, Verma Y, Grewal P, Bhardwaj P, Ahlawat N, Jangid NK. Photochemical Synthesis of Fused Five-membered O-heterocycles. CURRENT GREEN CHEMISTRY 2019. [DOI: 10.2174/2213346106666190904145200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Some transformations are not possible with ground-state reactions even in the presence of a
catalyst, hence they are performed under photochemical conditions. Electron transfer occurs even with
the photochemical excitement of one molecule where redox reaction is not possible at the ground
state. The side products are obtained from ground-state reactions. For C-C bond formation during photochemical
reactions, there is no requirement of any chemical activation of the substrates. Therefore,
these reactions are presented here for the synthesis of fused five-membered O-heterocycles in the context
of sustainable processes from 1964 to 2019.
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Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
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Kaur N, Bhardwaj P, Devi M, Verma Y, Grewal P. Photochemical reactions in five and six-membered polyheterocycles synthesis. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1622732] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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Poplata S, Bauer A, Storch G, Bach T. Intramolecular [2+2] Photocycloaddition of Cyclic Enones: Selectivity Control by Lewis Acids and Mechanistic Implications. Chemistry 2019; 25:8135-8148. [PMID: 30983074 PMCID: PMC6618137 DOI: 10.1002/chem.201901304] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Indexed: 11/16/2022]
Abstract
The intramolecular [2+2] photocycloaddition of 3‐alkenyl‐2‐cycloalkenones was performed in an enantioselective fashion (nine representative examples, 54–86 % yield, 76–96 % ee) upon irradiation at λ=366 nm in the presence of an AlBr3‐activated oxazaborolidine as the Lewis acid. An extensive screening of proline‐derived oxazaborolidines showed that the enantioface differentiation depends strongly on the nature of the aryl group at the 3‐position of the heterocycle. DFT calculations of the Lewis acid–substrate complex indicate that attractive dispersion forces may be responsible for a change of the binding mode. The catalytic [2+2] photocycloaddition was shown to proceed on the triplet hypersurface with a quantum yield of 0.05. The positive effect of Lewis acids on the outcome of a given intramolecular [2+2] photocycloaddition was illustrated by optimizing the key step in a concise total synthesis of the sesquiterpene (±)‐italicene.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747, Garching, Germany
| | - Andreas Bauer
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747, Garching, Germany
| | - Golo Storch
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747, Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747, Garching, Germany
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Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali University, Banasthali, India
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Xin Y, Rodríguez-Santiago L, Sodupe M, Álvarez-Larena A, Busqué F, Alibés R. Intramolecular Photocycloaddition of 2(5 H)-Furanones to Temporarily Tethered Terminal Alkenes as a Stereoselective Source of Enantiomerically Pure Polyfunctionalyzed Cyclobutanes. J Org Chem 2018; 83:3188-3199. [PMID: 29461058 DOI: 10.1021/acs.joc.8b00088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Allyloxymethyloxymethyl and 4-pentenoyloxymethyl substituents have been used as tethering groups to study the intramolecular [2 + 2] photocycloaddition of chiral 5-substituted 2(5 H)-furanones. The photoreactions proceed in good yield and provide the expected regio- and diastereoselective tricyclic compounds with complementary regioselectivity, which depends on whether the vinyl chain is attached to the furanone by an acetal or an ester linkage. Computational simulations agree with experimental observations and indicate that the origin of the different observed regioselectivity in the intramolecular photochemical reaction of lactones 5 and 6 arises from the relative stability of the initial conformers. The synthetic potential of the enantiomerically pure photoadducts is illustrated by preparing an all- cis 1,2,3-trisubstituted cyclobutane bearing fully orthogonally protected hydroxyl groups.
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9
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Poplata S, Bach T. Enantioselective Intermolecular [2+2] Photocycloaddition Reaction of Cyclic Enones and Its Application in a Synthesis of (-)-Grandisol. J Am Chem Soc 2018; 140:3228-3231. [PMID: 29458250 PMCID: PMC5849358 DOI: 10.1021/jacs.8b01011] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The
intermolecular [2+2] photocycloaddition of typical cyclic α,β-unsaturated
enones, such as 2-cyclohexenone, with olefins was performed in moderate
to good yields (42–82%) and with high enantioselectivity (82%–96% ee). An unusual substitution pattern at the chiral oxazaborolidine-AlBr3 Lewis acid complex that promotes the reaction was found to
be crucial for the success of the reaction. The method was applied
to the enantioselective synthesis of the monoterpene (−)-grandisol,
which could be accomplished in six steps and with an overall yield
of 13% starting from 3-methyl-2-cyclohexenone.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis Research Center (CRC) , Technische Universität München , Lichtenbergstrasse 4 , 85747 Garching , Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC) , Technische Universität München , Lichtenbergstrasse 4 , 85747 Garching , Germany
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Poplata S, Tröster A, Zou YQ, Bach T. Recent Advances in the Synthesis of Cyclobutanes by Olefin [2 + 2] Photocycloaddition Reactions. Chem Rev 2016; 116:9748-815. [PMID: 27018601 PMCID: PMC5025837 DOI: 10.1021/acs.chemrev.5b00723] [Citation(s) in RCA: 656] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 11/30/2022]
Abstract
The [2 + 2] photocycloaddition is undisputedly the most important and most frequently used photochemical reaction. In this review, it is attempted to cover all recent aspects of [2 + 2] photocycloaddition chemistry with an emphasis on synthetically relevant, regio-, and stereoselective reactions. The review aims to comprehensively discuss relevant work, which was done in the field in the last 20 years (i.e., from 1995 to 2015). Organization of the data follows a subdivision according to mechanism and substrate classes. Cu(I) and PET (photoinduced electron transfer) catalysis are treated separately in sections 2 and 4 , whereas the vast majority of photocycloaddition reactions which occur by direct excitation or sensitization are divided within section 3 into individual subsections according to the photochemically excited olefin.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Andreas Tröster
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - You-Quan Zou
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
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Mukhina OA, Kutateladze AG. Oxazolines as Dual-Function Traceless Chromophores and Chiral Auxiliaries: Enantioselective Photoassisted Synthesis of Polyheterocyclic Ketones. J Am Chem Soc 2016; 138:2110-3. [PMID: 26866604 PMCID: PMC5578731 DOI: 10.1021/jacs.5b12690] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
2-(o-Amidophenyl)oxa- and -thiazolines undergo excited-state intramolecular proton transfer (ESIPT), generating aza-o-xylylenes capable of intramolecular [4+2] and [4+4] cycloadditions with tethered unsaturated pendants. Facile hydrolysis of the primary photoproducts, spiro-oxazolidines and thiazolidines, under mild conditions unmasks a phenone functionality. Variations in linkers allow for access to diverse core scaffolds in the primary photoproducts, rendering the approach compatible with the philosophy of diversity-oriented synthesis. Chiral oxazolines, readily available from the corresponding amino alcohols, yield enantioenriched keto-polyheterocycles of complex topologies with enantiomeric excess values up to 90%.
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Affiliation(s)
- Olga A. Mukhina
- Department of Chemistry and Biochemistry, University of Denver, 2190 E. Iliff Ave. Denver, CO 80208-2436 (USA)
| | - Andrei G. Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, 2190 E. Iliff Ave. Denver, CO 80208-2436 (USA)
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Ramamurthy V, Mondal B. Supramolecular photochemistry concepts highlighted with select examples. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2015. [DOI: 10.1016/j.jphotochemrev.2015.04.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hernvann F, Rasore G, Declerck V, Aitken DJ. Stereoselective intermolecular [2 + 2]-photocycloaddition reactions of maleic anhydride: stereocontrolled and regiocontrolled access to 1,2,3-trifunctionalized cyclobutanes. Org Biomol Chem 2014; 12:8212-22. [DOI: 10.1039/c4ob01383b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Yanagisawa Y, Nishiyama Y, Tanimoto H, Morimoto T, Kakiuchi K. Enantiodifferentiating [2+2] photocycloaddition of cyclohexenone carboxylic acid with ethylene using 8-phenylmenthyl amine as a chiral template. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Bach T, A. Fort D, J. Woltering T, M. Alker A. Photochemical Reactions of Prop-2-enyl and Prop-2-ynyl Substituted 4-Aminomethyl- and 4-Oxymethyl-2(5H)-furanones. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)67] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yin G, Herdtweck E, Bach T. Enantioselective Access to Bicyclo[4.2.0]octanes by a Sequence of [2+2] Photocycloaddition/Reduction/Fragmentation. Chemistry 2013; 19:12639-43. [DOI: 10.1002/chem.201302882] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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MacDonald MJ, Hesp CR, Schipper DJ, Pesant M, Beauchemin AM. Highly enantioselective intermolecular hydroamination of allylic amines with chiral aldehydes as tethering catalysts. Chemistry 2013; 19:2597-601. [PMID: 23307591 DOI: 10.1002/chem.201203462] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Melissa J MacDonald
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie-Curie, Ottawa, ON K1N 6N5, Canada
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Inhülsen I, Akiyama N, Tsutsumi K, Nishiyama Y, Kakiuchi K. Highly diastereodifferentiating and regioselective [2+2]-photoreactions using methoxyaromatic menthyl cyclohexenone carboxylates. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Trant JF, Belding L, Dudding T, Hudlicky T. Application of D- chiro-Inositol as a Chiral Template for the DielsAlderReaction. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bhat S, Olaleye O, Meyer KJ, Shi W, Zhang Y, Liu JO. Analogs of N'-hydroxy-N-(4H,5H-naphtho[1,2-d]thiazol-2-yl)methanimidamide inhibit Mycobacterium tuberculosis methionine aminopeptidases. Bioorg Med Chem 2012; 20:4507-13. [PMID: 22704656 PMCID: PMC3495175 DOI: 10.1016/j.bmc.2012.05.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 05/03/2012] [Accepted: 05/11/2012] [Indexed: 12/28/2022]
Abstract
Our previous target validation studies established that inhibition of methionine aminopeptidases (MtMetAP, type 1a and 1c) from Mycobacterium tuberculosis (Mtb) is an effective approach to suppress Mtb growth in culture. A novel class of MtMetAP1c inhibitors comprising of N'-hydroxy-N-(4H,5H-naphtho[1,2-d]thiazol-2-yl)methanimidamide (4c) was uncovered through a high-throughput screen (HTS). A systematic structure-activity relationship study (SAR) yielded variants of the hit, 4b, 4h, and 4k, bearing modified A- and B-rings as potent inhibitors of both MtMetAPs. Except methanimidamide 4h that showed a moderate Mtb inhibition, a desirable minimum inhibitory concentration (MIC) was not obtained with the current set of MtMetAP inhibitors. However, the SAR data generated thus far may prove valuable for further tuning of this class of inhibitors as effective anti-tuberculosis agents.
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Affiliation(s)
- Shridhar Bhat
- Department of Pharmacology & Molecular Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Omonike Olaleye
- Department of Pharmacology & Molecular Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Kirsten J. Meyer
- Department of Pharmacology & Molecular Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Wanliang Shi
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Ying Zhang
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Jun O. Liu
- Department of Pharmacology & Molecular Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Oncology, Johns Hopkins University School of Medicine, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
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Talavera G, Reyes E, Vicario JL, Carrillo L. Cooperative Dienamine/Hydrogen-Bonding Catalysis: Enantioselective Formal [2+2] Cycloaddition of Enals with Nitroalkenes. Angew Chem Int Ed Engl 2012; 51:4104-7. [DOI: 10.1002/anie.201200269] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Indexed: 11/09/2022]
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Talavera G, Reyes E, Vicario JL, Carrillo L. Cooperative Dienamine/Hydrogen-Bonding Catalysis: Enantioselective Formal [2+2] Cycloaddition of Enals with Nitroalkenes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200269] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Haleema S, Sasi PV, Ibnusaud I, Polavarapu PL, Kagan HB. Enantiomerically pure compounds related to chiral hydroxy acids derived from renewable resources. RSC Adv 2012. [DOI: 10.1039/c2ra21205f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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MacDonald MJ, Schipper DJ, Ng PJ, Moran J, Beauchemin AM. A catalytic tethering strategy: simple aldehydes catalyze intermolecular alkene hydroaminations. J Am Chem Soc 2011; 133:20100-3. [PMID: 22098595 DOI: 10.1021/ja208867g] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we describe a catalytic tethering strategy in which simple aldehyde precatalysts enable, through temporary intramolecularity, room-temperature intermolecular hydroamination reactivity and the synthesis of vicinal diamines. The catalyst allows the formation of a mixed aminal from an allylic amine and a hydroxylamine, resulting in a facile intramolecular hydroamination event. The promising enantioselectivities obtained with a chiral aldehyde also highlight the potential of this catalytic tethering approach in asymmetric catalysis and demonstrate that efficient enantioinduction relying only on temporary intramolecularity is possible.
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Affiliation(s)
- Melissa J MacDonald
- Center for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
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Takashima Y, Kaneko Y, Kobayashi Y. Synthetic access to optically active isoflavans by using allylic substitution. Tetrahedron 2010. [DOI: 10.1016/j.tet.2009.10.116] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Le Liepvre M, Ollivier J, Aitken DJ. Synthesis of Functionalized Bicyclo[3.2.0]heptanes - a Study of the [2+2] Photocycloaddition Reactions of 4-Hydroxycyclopent-2-enone Derivatives. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900749] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Takizawa K, Nulwala H, Hu J, Yoshinaga K, Hawker CJ. Molecularly defined (L)-lactic acid oligomers and polymers: Synthesis and characterization. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22944] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- Norbert Hoffmann
- Laboratoire des Réactions Sélectives et Applications, UMR 6519 CNRS et Université de Reims Champagne-Ardenne, UFR Sciences, B.P. 1039, F-51687 Reims, Cedex 02, France
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Tian L, He F, Zhang H, Xu H, Yang B, Wang C, Lu P, Hanif M, Li F, Ma Y, Shen J. Thermal Cycloaddition Facilitated by Orthogonal π–π Organization through Conformational Transfer in a Swivel-Cruciform Oligo(phenylenevinylene). Angew Chem Int Ed Engl 2007; 46:3245-8. [PMID: 17378001 DOI: 10.1002/anie.200603878] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Leilei Tian
- Key Laboratory for Supramolecular Structure and Materials of the Ministry of Education, Jilin University, Changchun 130012, PR China
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Tian L, He F, Zhang H, Xu H, Yang B, Wang C, Lu P, Hanif M, Li F, Ma Y, Shen J. Thermal Cycloaddition Facilitated by Orthogonal π–π Organization through Conformational Transfer in a Swivel-Cruciform Oligo(phenylenevinylene). Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603878] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Gülten Ş, Sharpe A, Baker JR, Booker-Milburn KI. Use of temporary tethers in the intramolecular [2+2] photocycloaddition reactions of tetrahydrophthalimide derivatives: a new approach to complex tricyclic lactones. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.02.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Redon S, Piva O. Diastereoselective transannular [2+2] photocycloaddition of ascorbic acid derivatives. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.11.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
The total synthesis of rac-heliophenanthrone (3a) was achieved by a convergent approach, making use of a transition-metal-catalyzed domino process with an intramolecular Diels-Alder reaction at an isobenzopyrylium cation as key step.
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Affiliation(s)
- Gerald Dyker
- Fakultät für Chemie, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany.
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34
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Sarkar N, Nayek A, Ghosh S. Copper(I)-Catalyzed Intramolecular Asymmetric [2 + 2] Photocycloaddition. Synthesis of Both Enantiomers of Cyclobutane Derivatives. Org Lett 2004; 6:1903-5. [PMID: 15176779 DOI: 10.1021/ol049696h] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A simple approach for asymmetric induction in Cu(I)-catalyzed [2 + 2] photocycloaddition, where asymmetric catalysts or chiral auxiliaries were inefficient, has been developed using the concept of chirality transfer from the readily available 2, 3-di-O-cyclohexylidine-(R)-(+)-glyceraldehyde. An anion-induced cleavage of the tetrahydrofuran ring of the resulting oxa-bicyclo[3.2.0]heptanes led to a convenient access to the synthetically useful cis-1,2-disubstituted cyclobutanes in enantiomerically pure form.
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Affiliation(s)
- Niladri Sarkar
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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35
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Sivaguru J, Natarajan A, Kaanumalle LS, Shailaja J, Uppili S, Joy A, Ramamurthy V. Asymmetric photoreactions within zeolites: role of confinement and alkali metal ions. Acc Chem Res 2003; 36:509-21. [PMID: 12859212 DOI: 10.1021/ar020269i] [Citation(s) in RCA: 160] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this Account strategies using zeolites as media to achieve chiral induction are presented. Diastereomeric excesses as high as 90% and enantiomeric excesses up to 78% have been obtained with selected systems within zeolites. The same systems show no asymmetric induction in solution. Chiral induction is dependent on the alkali ions present in the zeolites. Alkali ions control not only the extent of asymmetric induction but often the isomer being enhanced. Results of ab initio computations have allowed us to gain an insight into the observed selectivity within zeolites.
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Affiliation(s)
- J Sivaguru
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
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36
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Pedrosa R, Andrés C, Nieto J, del Pozo S. Synthesis of enantiopure 3-azabicyclo[3.2.0]heptanes by diastereoselective intramolecular [2+2] photocycloaddition reactions on chiral perhydro-1,3-benzoxazines. J Org Chem 2003; 68:4923-31. [PMID: 12790601 DOI: 10.1021/jo034251c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[2+2] photocycloadditions involving chiral 3-acryloyl-2-vinylperhydro-1,3-benzoxazines derived from (-)-8-aminomenthol are highly diastereoselective reactions. The facial selectivity depends on the type of substitution at the vinyl double bond, and always leads to cis-fused bicyclic derivatives. The de is good for compounds with one substituent at the outer carbon of the double bond at C-2, but only one diastereomer is formed in cyclizations of compounds with two substituents at that position. The elimination of the menthol appendage gives enantiopure 3-azabicyclo[3.2.0]heptanes.
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Affiliation(s)
- Rafael Pedrosa
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid, Dr. Mergelina s/n, 47011-Valladolid, Spain.
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Lee-Ruff E, Mladenova G. Enantiomerically pure cyclobutane derivatives and their use in organic synthesis. Chem Rev 2003; 103:1449-83. [PMID: 12683788 DOI: 10.1021/cr010013a] [Citation(s) in RCA: 432] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Edward Lee-Ruff
- Department of Chemistry, York University, Toronto, Ontario M3J 1P3, Canada.
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Shailaja J, Karthikeyan S, Ramamurthy V. Cyclodextrin mediated solvent-free enantioselective photocyclization of N-alkyl pyridones. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)02338-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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