Results 61 to 70 of about 47,838 (205)

Enantiocontrolled Synthesis of Trialkyl-Substituted Stereogenic Carbons. A General Route to cis-3,5-Dialkyl γ-Lactones

, 2016
Lewis acid treatment of tertiary Co2(CO)6-propargylic alcohols having a stereochemically defined benzyloxy group at the γ-benzyl position yielded after cobalt demetalation sec-dialkyl bishomopropargylic alcohols in good yields.
Víctor S. Martín (727839), David Díaz (2493766)   +1 more
core   +1 more source

Indium-Catalyzed Direct Conversion of Lactones into Thiolactones Using a Disilathiane as a Sulfur Source

Molecules, 2018
An indium-catalyzed reaction of lactones and a disilathiane leading to thiolactones is described. The direct synthesis of thiolactones from lactones with an appropriate sulfur source is one of the most attractive approaches in organic and pharmaceutical ...
Yohei Ogiwara, Ken Takano, Shuhei Horikawa, Norio Sakai   +3 more
doaj   +1 more source

Síntese one-pot de a-arilideno- ð-lactonas a partir de brometos alílicos funcionalizados : estudo das etapas reacionais e caracterização dos intermediários [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2014Neste trabalho foi estudada a síntese de a-arilideno-ð-lactonas utilizando alguns dos ...
Conceição, Henrique Pinheiro da
core  

Synthesis of Natural Fragrant Molecules cis-3-Methyl-4-decanolide and Aerangis Lactone. General Enantioselective Routes to β,γ-cis-Disubstituted γ-Lactones and γ,δ-cis-Disubstituted δ-Lactones

, 2016
General enantioselective routes to 3,4-cis-dialkyl substituted γ-lactones and 4,5-cis-dialkyl substituted δ-lactones using TiCl4-mediated Evans asymmetric aldolization as the key step are reported.
Chao-Jun Tang (2487484), Wei Shi (68167), Xin Shen (108948), Zhi-Long Chen (3032493), Qi Hu (516214), Yikang Wu (770398)   +5 more
core   +1 more source

Effect of different types of sesquiterpene lactones on the maturation of Rhinella Arenarum oocytes [PDF]

, 2015
The sesquiterpene lactones (STLs) are a large class of plant secondary metabolites that are generally found in the Asteraceae family and that have high diversity with respect to chemical structure as well as biological activity. STLs have been classified
Zapata Martínez, J., Bühler, M. I., Catalan, Cesar Atilio Nazareno, Sánchez Toranzo, G.   +3 more
core   +1 more source

Scientific Opinion on Flavouring Group Evaluation 217 Revision 2 (FGE.217Rev2), consideration of genotoxic potential for α,β‐unsaturated ketones and precursors from chemical subgroup 4.1 of FGE.19: lactones

EFSA Journal, 2019
The Panel on Food Additives and Flavourings of the European Food Safety Authority was requested to evaluate the genotoxic potential of 12 flavouring substances from subgroup 4.1 of FGE.19 in the Flavouring Group Evaluation 217 (FGE.217).
EFSA Panel on Food Additives and Flavourings (FAF), Maged Younes, Gabriele Aquilina, Laurence Castle, Karl‐Heinz Engel, Paul Fowler, Maria Jose Frutos Fernandez, Peter Fürst, Ursula Gundert‐Remy, Rainer Gürtler, Trine Husøy, Peter Moldeus, Agneta Oskarsson, Romina Shah, Ine Waalkens‐Berendsen, Detlef Wölfle, Romualdo Benigni, Claudia Bolognesi, Kevin Chipman, Eugenia Cordelli, Gisela Degen, Daniel Marzin, Camilla Svendsen, Maria Carfì, Giorgia Vianello, Wim Mennes   +25 more
doaj   +1 more source

Leishmanicidal Activity of Aliphatic and Aromatic Lactones: Correlation Structure-Activity

Molecules, 2009
Several aliphatic and aromatic lactones and two dimers were synthesized using the sequence: allylation - esterification - metathesis. These compounds were active in vitro against intracellular amastigotes of Leishmania panamensis.
Fernando Echeverri, Wilson Cardona, Sara Robledo, Winston Quiñones, Marcela Castaño   +4 more
doaj   +1 more source

MOESM1 of Metabolic engineering of Ashbya gossypii for deciphering the de novo biosynthesis of γ-lactones

, 2019
Additional file 1: Fig. S1. Specific productions (μg/gCDW) of the two major higher alcohols identified in cultures of non-engineered A. gossypii strains. Production levels of (A) 2-phenylethanol and (B) isoamyl alcohol.
Lucília Domingues (6525419), Eduardo Coelho (4711017), Alberto Jiménez (3407252), José Revuelta (3407243), Tatiana Aguiar (6525416), Rui Silva (5735231)   +5 more
core   +1 more source

Production Technologies of Pharmacologically Active Sesquiterpene Lactones [PDF]

, 2018
Sesquiterpene lactones form a large group belonging to natural terpenoids series, generally found in plants of Asteraceae family and exhibiting anti-tumor, antiviral, immunostimulant, antifungal, antimicrobial, anti-inflammatory, antimutagenic, growth ...
A.S. Kishkentayeva
core   +1 more source

Fungal Strains as Catalysts for the Biotransformation of Halolactones by Hydrolytic Dehalogenation with the Dimethylcyclohexane System

Molecules, 2012
Bicyclic chloro-, bromo- and iodo-γ-lactones with dimethylcyclohexane rings were used as substrates for bioconversion by several fungal strains (<em>Fusarium</em>, <em>Botrytis</em> and <em>Beauveria</em>). Most of the
Małgorzata Grabarczyk
doaj   +1 more source