Results 21 to 30 of about 76,516 (303)

Fabricated Gamma-Alumina-Supported Zinc Ferrite Catalyst for Solvent-Free Aerobic Oxidation of Cyclic Ethers to Lactones

Molecules, 2023
The aim of this work was to fabricate a new heterogeneous catalyst as zinc ferrite (ZF) supported on gamma-alumina (γ-Al2O3) for the conversion of cyclic ethers to the corresponding, more valuable lactones, using a solvent-free method and O2 as an ...
Naaser A. Y. Abduh, Abdullah A. Al-Kahtani, Mabrook S. Amer, Tahani Saad Algarni, Abdel-Basit Al-Odayni   +4 more
doaj   +1 more source

Biocatalytic Synthesis of Stereospecific Triketide Lactones using Polyketide Synthases [PDF]

, 2016
Polyketide synthases are modular enzymes that create and modify large acyl chains. The domains and modules of polyketide synthases allow us to create molecules that resemble naturally occurring products by applying a biocatalytic in vitro in vivo ...
Alexander, Bradley
core   +1 more source

Synthesis and Cytotoxic Activity of Some 3-Benzyl-5-Arylidenefuran-2(5H)-ones

Molecules, 2007
3-Benzyl-furan-2(5H)-one (2a) and 3-(4-bromobenzyl)-furan-2(5H)-one (2b) were treated with TBDMSOTf and converted into the corresponding tert-butyldimethyl-silylfuran ethers.
Manoel Odorico Moraes, Cláudia Pessoa, Letícia Veras Costa-Lotuf, Daniel Pereira Bezerra, Marcelo Eça Rocha, Célia Regina Alvares Maltha, Luiz Cláudio Barbosa, Róbson Ricardo Teixeira   +7 more
doaj   +1 more source

Contribution of microscopy for understanding the mechanism of action against trypanosomatids [PDF]

, 2018
Transmission electron microscopy (TEM) has proved to be a useful tool to study the ultrastructural alterations and the target organelles of new antitrypanosomatid drugs.
A Martinez-Palomo, A Montalvetti, A Rassi, AB Penissi, AE Eakin, AH Kolien, AJ Solari, AM Sánchez, Ana Yecê das Neves Pinto, C Brack, CF Silva Da, D Gonzalez-Pacanowska, DA Campbell, DA Johnston, DJ Hammond, DV Andrade, E Bontempi, E Lozano, E Lozano, E Lozano, EO Ogbadoiyi, ES Garcia, ES Lozano, F Dos Reis, FR Opperdoes, FR Opperdoes, FR Opperdoes, FS Laranja, H Meyer, H Meyer, J Aldunate, J Lukes, J McKerrow, J Mottram, JA Urbina, JA Urbina, JA Urbina, JA Urbina, JC Engel, JC Linder, JCP Dias, JCP Dias, JD Bergstrom, JD Maya, JF Turrens, JJ Marr, JL Avila, JL Avila, Juliano de Toledo, K Lazardi, K Miranda, K Miranda, KH Lee, L Simpson, LV Muschietti, M Meirelles, M Nieto, MC Elias, MCQB Elias, MR Ariyanayagam, MR Ariyanayagam, NM Sayed El, O Campetella, OS Giordano, OS Giordano, P Barrera, P Webster, PF Pimenta, R Docampo, S Sepúlveda-Boza, SD Brengio, SR Wilkinson, T Souto-Padron, T Souto-Padron, T Souto-Padron, T Souto-Padron, TA Shapiro, TS Tiuman, V Jimenez-Ortiz, V Sülsen, VP Sülsen, VP Sülsen, VV Costantino, W Souza De, W Souza De, W Souza De, W Souza De, W Souza De, W Souza De, Wanderley de Souza, WE Gutteridge   +90 more
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Synthesis of spiroacetals using functionalised titanium carbenoids [PDF]

, 2008
Alkylidenation of lactones with functionalised titanium carbenoid reagents (Schrock carbenes) followed by acid-induced cyclisation of the resulting enol ethers constitutes a new method for the preparation of [4.4], [4.5] and [5.5] spiroacetals (1,6 ...
Aho, Alcaide, Boxer, Brimble, Calver A. Main, Canova, Chang, Cuzzupe, Denmark, Doubsky, D’Annibale, El-Badri, Enders, Evans, Furrow, Godoy, Hartley, Hayes, Horikawa, Inoue, Ireland, Keaton, Krishna, Kumar, Lowe, Lu, Macleod, McKiernan, Mead, Morimoto, Mortimore, Nakashima, Ousset, Paquette, Paterson, Perron, Petasis, Phillips, Richard C. Hartley, Sakaguchi, Shahzad S. Rahman, Takai, Takeda, Tebbe, Tietze, Tsang, Van Orden, Velluci, Vuagnoux-D’Augustin, Wang, Yan, Yang, Zhou   +52 more
core   +1 more source

Formation of carboxylic acids during degradation of monosaccharides

Czech Journal of Food Sciences, 2008
The formation of low molecular carboxylic and hydroxycarboxylic acids as well as sugar and deoxysugar acids from monosaccharides (D-glucose, D-fructose, D-arabinose, DL-glyceraldehyde, and 1,3-dihydroxyacetone) was studied in three different model ...
Ondřej Novotný, Karel Cejpek, Jan Velíšek   +2 more
doaj   +1 more source

Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. [PDF]

, 2017
Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels-Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones from readily prepared dienes, commodity acid chlorides ...
Abbasov, Mikail E, Hudson, Brandi M, Romo, Daniel, Tantillo, Dean J   +3 more
core   +2 more sources

Systematic investigations on the reduction of 4-aryl-4-oxoesters to 1-aryl-1,4-butanediols with methanolic sodium borohydride

Beilstein Journal of Organic Chemistry, 2010
4-Aryl-4-oxoesters undergo facile reduction of both the keto and the ester groups with methanolic NaBH4 at room temperature to yield the corresponding 1-aryl-1,4-butanediols whereas 4-alkyl-4-oxoesters furnish the corresponding 1,4-butanolides via ...
Subrata Kumar Chaudhuri, Manabendra Saha, Amit Saha, Sanjay Bhar   +3 more
doaj   +1 more source

Lactones from the Sponge-Derived Fungus Talaromyces rugulosus

Marine Drugs, 2017
The marine-derived fungus Talaromyces rugulosus isolated from the Mediterranean sponge Axinella cannabina and cultured on solid rice medium yielded seventeen lactone derivatives including five butenolides (1–5), seven (3S)-resorcylide derivatives (6–12),
Lisa Küppers, Weaam Ebrahim, Mona El-Neketi, Ferhat C. Özkaya, Attila Mándi, Tibor Kurtán, Raha S. Orfali, Werner E. G. Müller, Rudolf Hartmann, Wenhan Lin, Weiguo Song, Zhen Liu, Peter Proksch   +12 more
doaj   +1 more source

Preparation of Enantiomeric β-(2′,5′-Dimethylphenyl)Bromolactones, Their Antiproliferative Activity and Effect on Biological Membranes

Molecules, 2018
Three novel enantiomeric pairs of bromolactones possesing a 2,5-dimethylphenyl substituent at the β-position of the lactone ring have been synthesized from corresponding enantiomeric (E)-3-(2′,5′-dimethylphenyl)hex-4-enoic acids (4) by ...
Witold Gładkowski, Aleksandra Włoch, Aleksandra Pawlak, Angelika Sysak, Agata Białońska, Marcelina Mazur, Paweł Mituła, Gabriela Maciejewska, Bożena Obmińska-Mrukowicz, Halina Kleszczyńska   +9 more
doaj   +1 more source