Results 31 to 40 of about 47,838 (205)

Highly Stereoselective Alkylation of Spiro-γ-lactones

, 2016
The alkylation of the (±)-spiro-γ-lactones 1 and 5a occurs with high diastereofacial selectivity. Geometry-optimized ab initio 4-31G calculations on enol 7 suggest that electrophilic attack occurs at an angle of about 80° to the plane of the enolate ...
Pierre-Yves Michellys (2123803), Maurice Santelli (2508484), Hélène Pellissier (3026499)   +2 more
core   +1 more source

The 192R/Q polymorphs of serum paraoxonase PON1 differ in HDL binding, lipolactonase stimulation, and cholesterol effluxs⃞

Journal of Lipid Research, 2006
Serum paraoxonase (PON1) is a HDL-associated enzyme exhibiting potentially antiatherogenic properties. Here, we examined the common PON1-192R/Q human polymorphism. Despite numerous studies, the effect of this polymorphism on the antiatherogenic potential
Leonid Gaidukov, Mira Rosenblat, Michael Aviram, Dan S. Tawfik   +3 more
doaj   +1 more source

Sensory-Directed Identification of Creaminess-Enhancing Semi-Volatile Lactones in Crumb Chocolate

Foods, 2021
In order to gain a more comprehensive knowledge of the chemical nature of creaminess-related flavor compounds in milk chocolates on a molecular level, crumb chocolate was analyzed by means of activity guided screening techniques.
Julia Samfaß, Timo D. Stark, Thomas F. Hofmann   +2 more
doaj   +1 more source

Oxidative Cleavage of Indole δ-Lactones with m-Chloroperbenzoic Acid:  First Synthesis of Spiroindolin-2-one γ-Lactones

, 2016
Oxidative Cleavage of Indole δ-Lactones with m-Chloroperbenzoic Acid:  First Synthesis of Spiroindolin-2-one γ ...
Sylviane Giorgi-Renault (2440645), Henri-Philippe Husson (2681797), Christophe Tratrat (3025848)   +2 more
core   +1 more source

Access to Unsaturated Bicyclic Lactones by Overriding Conventional C(sp3)-H Site Selectivity [PDF]

, 2022
Selective transformation of unactivated CH bonds is one of the notable advances in synthetic chemistry in last 20 years to streamline the synthesis of complex organic molecules.
Haibo , Ge, Suparna , Dutta, Xinglong, Zhang, Tanay, Pal, Wajid , Ali, Astam , Mandal, Debabrata, Maiti, Animesh , Ghosh, Chitrala , Teja, Jayabrata , Das, Rajagopal, Pothikumar   +10 more
core   +2 more sources

Changes in the Chemical Composition of Plum Distillate During Maturation with Oak Chips under Different Conditions

Food Technology and Biotechnology, 2017
This study investigates the effect of ageing on the qualitative and quantitative composition of plum distillate in contact with oak wood chips. Maturation was performed with lightly toasted French oak (Quercus sessiflora and Quercus robur) chips or oak ...
Maria Balcerek, Katarzyna Pielech-Przybylska, Urszula Dziekońska-Kubczak, Piotr Patelski, Ewelina Strąk   +4 more
doaj   +1 more source

Kava Lactones and the kava-kava controversy

, 2003
Kava-kava is a traditional beverage of the South Pacific islanders and has had centuries of use without major side effects. Standardised extracts of kava-kava produced in Europe have led to many serious health problems and even to death.
Whitton, P.A., Whitehouse, J., Lau, A., Salisbury, A., Evans, C.S.   +4 more
core   +1 more source

Highly Diastereoselective and Asymmetric Diels−Alder Reactions of Masked o-Benzoquinones with Chiral Racemic and Homochiral Furans. Synthesis of Optically Active Tricyclic γ-Lactones

, 2016
The first examples of highly diastereoselective and asymmetric Diels−Alder cycloadditions of in situ generated masked o-benzoquinones (MOBs) with chiral racemic and homochiral furans bearing a chiral center in the α-position leading to highly ...
Yu-Yu Chou (1973554), Rama Krishna Peddinti (1867516), Chun-Chen Liao (1973557)   +2 more
core   +2 more sources

Ruthenium-Catalyzed Cyclic Carbonylation of Allenyl Alcohols. Selective Synthesis of γ- and δ-Lactones

, 2016
Ruthenium complex-catalyzed carbonylation of allenyl alcohols quantitatively gave cyclic carbonyl compounds, γ- and δ-lactones, in which the hydroxy group of allenyl alcohols participated in the cyclization.
Takayuki Kaneko (3042432), Shigetoshi Takahashi (2459455), Shi-Wei Zhang (2026936), Kiyotaka Onitsuka (1468588), Eiji Yoneda (2378104)   +4 more
core   +1 more source

Bioactive Lactones from the Mangrove-Derived Fungus Penicillium sp. TGM112

Marine Drugs, 2019
Three new lactones penicilactones A−C (1−3) were obtained from the mangrove-derived fungus Penicillium sp. TGM112. Their structures and absolute configurations were determined by detailed NMR, MS spectroscopic data, Mo2(OAc)4-induced ...
Meng Bai, Guo-Lei Huang, Rong-Qing Mei, Bin Wang, You-Ping Luo, Xu-Hua Nong, Guang-Ying Chen, Cai-Juan Zheng   +7 more
doaj   +1 more source