1
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Poojary MM, Zhang W, Olesen SB, Rauh V, Lund MN. Green Tea Extract Decreases Arg-Derived Advanced Glycation Endproducts but Not Lys-Derived AGEs in UHT Milk during 1-Year Storage. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:14261-14273. [PMID: 33201715 DOI: 10.1021/acs.jafc.0c05995] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Epigallocatechin gallate (EGCG)-enriched green tea extract (GTE) was added to lactose-reduced UHT-treated milk to evaluate its role in perturbing the Maillard reaction and the formation of advanced glycation endproducts (AGEs) during 1-year storage. The UHT processing caused epimerization of EGCG into gallocatechin gallate (GCG). For milk samples with added 0.1% w/v GTE, a EGCG/GCG loss of 26% was found soon after the UHT treatment and the loss increased to 64% after the 1-year of storage. LC-MS/MS analysis revealed the presence of various EGCG/GCG-α-dicarbonyl adducts and EGCG/GCG-hydroxymethylfurfural adducts in milk samples, while EGCG/GCG-amino acid adducts were not detected. Although EGCG/GCG trapped α-dicarbonyl compounds including glyoxal, methylglyoxal, 3-deoxyglucosone/3-deoxygalactosone, and diacetyl, it did not lower their net steady-state concentrations, except of 3-deoxyglucosone. The addition of GTE reduced the formation of Arg-derived AGEs by 2- to 3-fold, but surprisingly enhanced the accumulation of furosine and lysine-derived AGEs [Nε-(carboxymethyl)lysine and Nε-(carboxyethyl)lysine)] by 2-4-fold depending on the concentration of the added GTE and storage time. The present study shows that trapping of α-dicarbonyl compounds by EGCG may not be the major pathway for inhibiting the formation of AGEs in milk.
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Affiliation(s)
- Mahesha M Poojary
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark
| | - Wei Zhang
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark
| | - Sarah Bisgaard Olesen
- Department of Forensic Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
| | - Valentin Rauh
- Arla Foods Innovation Center, Agro Food Park 19, 8200 Aarhus N, Denmark
| | - Marianne N Lund
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3, 2200 Copenhagen N, Denmark
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2
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Ucar S, Dastan A. One‐pot
homo‐ and
cross‐coupling
of diazanaphthalenes via
C‐H
substitution: Synthesis of Bis‐ and
Tris‐diazanaphthalenes. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sefa Ucar
- Institution, Department of Chemistry, Faculty of Sciences Atatürk University Erzurum Turkey
| | - Arif Dastan
- Institution, Department of Chemistry, Faculty of Sciences Atatürk University Erzurum Turkey
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3
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Shangpliang OR, Wanniang K, Kshiar B, Marpna ID, Lipon TM, Mizar P, Myrboh B. PTSA-Catalyzed Reaction of Alkyl/Aryl Methyl Ketones with Aliphatic Alcohols in the Presence of Selenium Dioxide: A Protocol for the Generation of an α-Ketoacetals Library. ACS OMEGA 2019; 4:6035-6043. [PMID: 31459751 PMCID: PMC6649065 DOI: 10.1021/acsomega.9b00361] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 02/26/2019] [Indexed: 06/10/2023]
Abstract
A novel approach has been developed for the synthesis of a wide range of α-ketoacetals by the reaction of alkyl/aryl methyl ketones and aliphatic alcohols in the presence of selenium dioxide catalyzed by p-toluenesufonic acid. This method represents a general route to obtain a wide variety of α-ketoacetals in a simple, rapid, and practical manner. This approach is particularly attractive because of the easy availability of the starting materials, mild reaction temperature, and good yields of the products. The resulting α-ketoacetals are of much synthetic value as organic intermediates.
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Affiliation(s)
- O. Risuklang Shangpliang
- Centre
for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Mawlai, Shillong 793022, India
| | - Kmendashisha Wanniang
- Centre
for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Mawlai, Shillong 793022, India
| | - Baskhemlang Kshiar
- Centre
for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Mawlai, Shillong 793022, India
| | - Ibakyntiew D. Marpna
- Centre
for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Mawlai, Shillong 793022, India
| | - Tyrchain Mitre Lipon
- Centre
for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Mawlai, Shillong 793022, India
| | - Pushpak Mizar
- University
of Southampton, Southampton SO17 1BJ, U.K.
| | - Bekington Myrboh
- Centre
for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Mawlai, Shillong 793022, India
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4
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Xue X, Chen P, Xu P, Wang Y. Highly efficient and recyclable chiral Pt nanoparticle catalyst for enantioselective hydrogenation of activated ketones. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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5
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Goswami S, Das MK, Sain D, Goswami B. A concise treatment of pterins: some recent synthetic and methodology aspects and their applications in molecular sensors. Pteridines 2018. [DOI: 10.1515/pteridines-2018-0002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Abstract
A concise account of pterins in chemistry and biology and their applications in molecular sensors including their optical spectroscopic properties are described. Different natural, synthetic, biological and photophysical aspects are also discussed. Synthetic access to direct functionalised pterins and a recently reported new thiophene annulation technique are described for the synthesis of Form B of molybdenum cofactor. The receptor properties of fluorescent pterin molecules including selenopyrimidines which are rarely reported for their binding of anions and neutral molecules are also of major importance in this review. For such an old and still so young, unexplored pterin system on its power to be sensitive for physical studies especially the interaction with cations, anions and neutral molecules are fascinating and research in this area is relatively new and expected to increase fast. Pterin based receptors are for the first time put into a useful review for the advantage of those who want to explore pterin and modified pterin as chromogenic and fluorogenic sensors.
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Affiliation(s)
- Shyamaprosad Goswami
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal , India
| | - Manas Kumar Das
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal , India
| | - Dibyendu Sain
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal , India
| | - Bhaswati Goswami
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal , India
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6
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Liu Y, Zhang Z, Wan Y, Zhang G, Li Z, Bi J, Ma N, Liu T, Liu Q. Oxidation of β-Ketoamides: The Synthesis of Vicinal Tricarbonyl Amides. J Org Chem 2017; 82:3901-3907. [PMID: 28230362 DOI: 10.1021/acs.joc.6b03062] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A facile and direct oxidative reaction for the synthesis of vicinal tricarbonyl amides in moderate to excellent yields (53-88%) was developed starting from readily available β-ketoamides in the presence of phenyliodine(III) bis(trifluoroacetate). The resulting products possess significant synthetic potential, making this approach a valuable addition to the group of traditional methods already available for the preparation of these molecules.
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Affiliation(s)
- Yueyang Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Zhiguo Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Yameng Wan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Guisheng Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Zhonglian Li
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Jingjing Bi
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Nana Ma
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Tongxin Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Qingfeng Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henna Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P. R. China
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7
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Jeena V, Mazibuko M. Selenium Dioxide Mediated Benzylic sp3 C-H Oxidation in Acetic Acid: Synthesis of Lophine Derivatives from α-Methylene Ketones via a Domino Multicomponent Reaction. HETEROCYCLES 2017. [DOI: 10.3987/com-17-13769] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Obi CD, Okoro CO. Synthesis of 5-(trifluoromethyl)cyclohexane-1,2,3-trione (cVTC): new trifluoromethyl building block. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Goswami S, Das MK, Maity AC, Quah CK, Fun HK. Synthesis of 7-methyl-6-indolopterin and 7-methyl-6-indoloquinoxaline. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2016.1215467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Shyamaprosad Goswami
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India
| | - Manas Kumar Das
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India
| | - Annada C. Maity
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malasia
| | - Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malasia
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
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10
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Ravichandiran P, Lai B, Gu Y. Aldo-X Bifunctional Building Blocks for the Synthesis of Heterocycles. CHEM REC 2016; 17:142-183. [DOI: 10.1002/tcr.201600042] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Palanisamy Ravichandiran
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
| | - Bingbing Lai
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
| | - Yanlong Gu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Lanzhou 730000 P.R. China
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11
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Chandrashaker V, Ptaszek M, Taniguchi M, Lindsey JS. Synthesis of diverse acyclic precursors to pyrroles for studies of prebiotic routes to tetrapyrrole macrocycles. NEW J CHEM 2016. [DOI: 10.1039/c6nj02048h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Some 50 ketones, β-diketones, β-ketoesters and α-aminoketones have been prepared for studies of the formation of trisubstituted pyrroles equipped for self-condensation leading to tetrapyrrole macrocycles.
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Affiliation(s)
| | - Marcin Ptaszek
- Department of Chemistry
- North Carolina State University
- Raleigh
- USA
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12
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Abstract
Monanchocidin A is a recently isolated pentacyclic guanidinium alkaloid that contains an unusual highly oxidized morpholinone fragment. Herein we report a rapid synthesis of this heterocyclic scaffold and confirm its structure. The key reaction involves an acid promoted hemiketalization/hemiaminalization of an α-hydroxyamide and α-ketoaldehyde that proceeds with exclusive regioselectivity and high diastereoselectivity to form the natural scaffold in moderate to high yield.
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Affiliation(s)
- Yunlong Shi
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695, United States
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13
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Ashford DL, Glasson CRK, Norris MR, Concepcion JJ, Keinan S, Brennaman MK, Templeton JL, Meyer TJ. Controlling ground and excited state properties through ligand changes in ruthenium polypyridyl complexes. Inorg Chem 2014; 53:5637-46. [PMID: 24849026 DOI: 10.1021/ic500408j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The capture and storage of solar energy requires chromophores that absorb light throughout the solar spectrum. We report here the synthesis, characterization, electrochemical, and photophysical properties of a series of Ru(II) polypyridyl complexes of the type [Ru(bpy)2(N-N)](2+) (bpy = 2,2'-bipyridine; N-N is a bidentate polypyridyl ligand). In this series, the nature of the N-N ligand was altered, either through increased conjugation or incorporation of noncoordinating heteroatoms, as a way to use ligand electronic properties to tune redox potentials, absorption spectra, emission spectra, and excited state energies and lifetimes. Electrochemical measurements show that lowering the π* orbitals on the N-N ligand results in more positive Ru(3+/2+) redox potentials and more positive first ligand-based reduction potentials. The metal-to-ligand charge transfer absorptions of all of the new complexes are mostly red-shifted compared to Ru(bpy)3(2+) (λmax = 449 nm) with the lowest energy MLCT absorption appearing at λmax = 564 nm. Emission energies decrease from λmax = 650 nm to 885 nm across the series. One-mode Franck-Condon analysis of room-temperature emission spectra are used to calculate key excited state properties, including excited state redox potentials. The impacts of ligand changes on visible light absorption, excited state reduction potentials, and Ru(3+/2+) potentials are assessed in the context of preparing low energy light absorbers for application in dye-sensitized photoelectrosynthesis cells.
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Affiliation(s)
- Dennis L Ashford
- Department of Chemistry, University of North Carolina at Chapel Hill , CB 3290, Chapel Hill, North Carolina 27599, United States
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14
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Sivan A, Deepthi A. Facile synthesis of 1,2,3-tricarbonyls from 1,3-dicarbonyls mediated by cerium(IV) ammonium nitrate. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.145] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Liu Y, Jiang B, Zhang W, Xu Z. Multifold Bond Cleavage and Formation between MeOH and Quinoxalines (or Benzothiazoles): Synthesis of Carbaldehyde Dimethyl Acetals. J Org Chem 2013; 78:966-80. [DOI: 10.1021/jo302450f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yunkui Liu
- State Key
Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014,
People’s Republic of China
- College of Chemistry & Materials Engineering, Wenzhou University, Zhejiang Province, Wenzhou 325027, People’s Republic of China
| | - Bo Jiang
- State Key
Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014,
People’s Republic of China
| | - Wei Zhang
- State Key
Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014,
People’s Republic of China
| | - Zhenyuan Xu
- State Key
Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014,
People’s Republic of China
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16
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Allpress CJ, Grubel K, Szajna-Fuller E, Arif AM, Berreau LM. Regioselective aliphatic carbon-carbon bond cleavage by a model system of relevance to iron-containing acireductone dioxygenase. J Am Chem Soc 2012; 135:659-68. [PMID: 23214721 DOI: 10.1021/ja3038189] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mononuclear Fe(II) complexes ([(6-Ph(2)TPA)Fe(PhC(O)C(R)C(O)Ph)]X (3-X: R = OH, X = ClO(4) or OTf; 4: R = H, X = ClO(4))) supported by the 6-Ph(2)TPA chelate ligand (6-Ph(2)TPA = N,N-bis((6-phenyl-2-pyridyl)methyl)-N-(2-pyridylmethyl)amine) and containing a β-diketonate ligand bound via a six-membered chelate ring have been synthesized. The complexes have all been characterized by (1)H NMR, UV-vis, and infrared spectroscopy and variably by elemental analysis, mass spectrometry, and X-ray crystallography. Treatment of dry CH(3)CN solutions of 3-OTf with O(2) leads to oxidative cleavage of the C(1)-C(2) and C(2)-C(3) bonds of the acireductone via a dioxygenase reaction, leading to formation of carbon monoxide and 2 equiv of benzoic acid as well as two other products not derived from dioxygenase reactivity: 2-oxo-2-phenylethylbenzoate and benzil. Treatment of CH(3)CN/H(2)O solutions of 3-X with O(2) leads to the formation of an additional product, benzoylformic acid, indicative of the operation of a new reaction pathway in which only the C(1)-C(2) bond is cleaved. Mechanistic studies show that the change in regioselectivity is due to the hydration of a vicinal triketone intermediate in the presence of both an iron center and water. This is the first structural and functional model of relevance to iron-containing acireductone dioxygenase (Fe-ARD'), an enzyme in the methionine salvage pathway that catalyzes the regiospecific oxidation of 1,2-dihydroxy-3-oxo-(S)-methylthiopentene to form 2-oxo-4-methylthiobutyrate. Importantly, this model system is found to control the regioselectivity of aliphatic carbon-carbon bond cleavage by changes involving an intermediate in the reaction pathway, rather than by the binding mode of the substrate, as had been proposed in studies of acireductone enzymes.
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Affiliation(s)
- Caleb J Allpress
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
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17
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Wang Q, Zhang S, Guo F, Zhang B, Hu P, Wang Z. Natural α-amino acids applied in the synthesis of imidazo[1,5-a]N-heterocycles under mild conditions. J Org Chem 2012. [PMID: 23181828 DOI: 10.1021/jo302299u] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A facile iodine-mediated decarboxylative cyclization from α-amino acids and N-heterocyclic carbaldehydes was developed. By virtue of this method, a series of imidazo[1,5-a]N-heterocycles can be synthesized efficiently under mild conditions. A tentative reaction mechanism was proposed based on the experimental results and previous reports.
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Affiliation(s)
- Qiang Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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18
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Ayala-Mata F, Barrera-Mendoza C, Jiménez-Vázquez HA, Vargas-Díaz E, Zepeda LG. Efficient preparation of α-ketoacetals. Molecules 2012; 17:13864-78. [PMID: 23174902 PMCID: PMC6268805 DOI: 10.3390/molecules171213864] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 10/31/2012] [Accepted: 11/19/2012] [Indexed: 11/16/2022] Open
Abstract
The Weinreb amides 2a,b were prepared from the α,α-dimethoxyacetic acids 1c,d. A number of representative nucleophilic additions (RMgX and RLi) on 2 afforded α-ketoacetals 3a–j in 70–99% yield. These compounds represent a versatile arrangement of functional groups of significant synthetic value, as demonstrated in the synthesis of (±)-salbutamol.
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Affiliation(s)
| | | | | | | | - L. Gerardo Zepeda
- Author to whom correspondence should be addressed; ; Tel.: +52-55-5729-6300 (ext. 62412); Fax: +52-55-5396-3503
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19
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Morino K, Sudo A, Endo T. Reversible Fixation and Release of Alcohols by a Polymer Bearing Vicinal Tricarbonyl Moieties and Its Application to Synthesis and Reversible Cross-Linking–De-Cross-Linking System of a Networked Polymer. Macromolecules 2012. [DOI: 10.1021/ma3003196] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuhide Morino
- Molecular
Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka
820-8555, Japan
| | - Atsushi Sudo
- Molecular
Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka
820-8555, Japan
| | - Takeshi Endo
- Molecular
Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka
820-8555, Japan
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20
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Dei T, Morino K, Sudo A, Endo T. Synthesis and reversible hydration-dehydration system of copolymers bearing a vicinal tricarbonyl structure. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Sharma A, Vachhani D, Van der Eycken E. Direct Heteroarylation of Tautomerizable Heterocycles into Unsymmetrical and Symmetrical Biheterocycles via Pd/Cu-Catalyzed Phosphonium Coupling. Org Lett 2012; 14:1854-7. [DOI: 10.1021/ol300455e] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Abhishek Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Dipak Vachhani
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Erik Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
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22
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Santos MS, Coelho F. Oxidizing Morita–Baylis–Hillman adducts towards vicinal tricarbonyl compounds. RSC Adv 2012. [DOI: 10.1039/c2ra01267g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Ostrowska K, Szymoniak K, Szczurek M, Jamroży K, Rąpała-Kozik M. Efficient regioselective heterocyclisation leading to fluorescent fused pyrazine derivatives. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zhang X, Mu T, Zhan F, Ma L, Liang G. Total Synthesis of (−)-Isatisine A. Angew Chem Int Ed Engl 2011; 50:6164-6. [DOI: 10.1002/anie.201101621] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2011] [Indexed: 11/06/2022]
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Dei T, Morino K, Sudo A, Endo T. Construction of reversible hydration–dehydration system by a model compound and a novel polymer bearing vicinal tricarbonyl structure. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24656] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takehito Dei
- Molecular Engineering Insititute, Kinki University, 11‐6 Kayanomori, Iizuka, Fukuoka 820‐8555, Japan
| | - Kazuhide Morino
- Molecular Engineering Insititute, Kinki University, 11‐6 Kayanomori, Iizuka, Fukuoka 820‐8555, Japan
| | - Atsushi Sudo
- Molecular Engineering Insititute, Kinki University, 11‐6 Kayanomori, Iizuka, Fukuoka 820‐8555, Japan
| | - Takeshi Endo
- Molecular Engineering Insititute, Kinki University, 11‐6 Kayanomori, Iizuka, Fukuoka 820‐8555, Japan
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Kozhevnikov DN, Prokhorov AM. Triazines, Tetrazines and Fused Ring Polyaza Systems. PROGRESS IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/s0959-6380(11)22014-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Six-Membered Ring Systems:. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s0959-6380(11)22015-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Goswami S, Hazra A, Jana S, Fun HK. Recognition study of substituted benzoic acids by 7-substituted pterin receptors in solution and solid phases. CrystEngComm 2010. [DOI: 10.1039/b917092h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fun HK, Jebas SR, Maity AC, Das NK, Goswami S. 2-(Pyrene-1-yl)-1,3-dithiane. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o891. [PMID: 21582599 PMCID: PMC2969099 DOI: 10.1107/s1600536809010320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 03/20/2009] [Indexed: 12/03/2022]
Abstract
In the title compound, C20H16S2, the pyrene ring is planar [maximum deviation 0.0144 (15) Å] and the dithiane ring adopts a chair conformation. The crystal packing is stabilized by C—H⋯π interactions. An intramolecular C—H⋯S hydrogen bond generates an S(5) ring motif.
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