Results 21 to 30 of about 30,773 (318)
Chitosan-supported cinchona urea: Sustainable organocatalyst for asymmetric Michael reaction
, 2020 A novel chitosan-supported cinchona urea heterogeneous catalyst was developed for asymmetric reaction. The catalytic activity of the chitosan-supported organocatalyst was examined in the asymmetric Michael addition reaction to give chiral adducts in good
Mahmoud A. Abdelkawy +3 more
semanticscholar +1 more source
Recent Progress in Applications of Cinchona Alkaloids and Their Derivatives in Asymmetric Catalysis
Youji huaxue, 2020 Cinchona alkaloids widely exist in nature, which have attracted extensive interest of researchers because of their readily availability, biological activity, unique structural properties, and easy modification.
Shuang Xu +3 more
semanticscholar +1 more source
AGRIVITA Journal of Agricultural Science, 2018 Tea is a commodity that has a significant contribution to Indonesia’s foreign exchange, especially from non-oil and gas sectors. Fertilization is one of the important factors to produce high productivity and keep the plant healthy. The healthy plants are
Eko Pranoto +2 more
doaj +1 more source
Asymmetric synthesis of gonytolide A: strategic use of an aryl halide blocking group for oxidative coupling [PDF]
, 2018 The first synthesis of the chromanone lactone dimer gonytolide A has been achieved employing vanadium(V)-mediated oxidative coupling of the monomer gonytolide C. An o-bromine blocking group strategy was employed to favor para- para coupling and to enable
Iwata, Takayuki +5 more
core +1 more source
Molecules, 2019 By means of copper(I)-and ruthenium(II)-catalyzed click reactions of quinine- and quinidine-derived alkynes with azide-substituted chalcones a systematic series of novel cinchona-chalcone hybrid compounds, containing 1,4-disubstituted- and 1,5 ...
Tamás Jernei +7 more
doaj +1 more source
Effect of indigenous microbes on growth and blister blight disease of tea plant
Journal of Plant Protection Research, 2019 The role of the tea commodity in the economy of Indonesia is quite strategic. Various types of microorganisms in nature have been known to increase the benefit of the root function, suppress disease, and accelerate plant growth.
Fani Fauziah +4 more
doaj +1 more source
Asymmetric synthesis with cinchona-decorated cyclodextrin in a continuous-flow membrane reactor
Journal of Catalysis, 2019 This work presents a cyclodextrin-enhanced organocatalytic method from molecular to process design. Cinchona-thiourea and -squaramide catalysts were covalently anchored to inherently large, stable and well-defined permethyl-β-cyclodextrins.
Péter Kisszékelyi +9 more
semanticscholar +1 more source
Organocatalytic synthesis of axially chiral atropisomers [PDF]
, 2017 This review summarises the recent progress made in the organocatalytic synthesis of atropisomeric compounds. Methodologies based on dynamic kinetic resolution and direct access to BINOL-like biaryls are described.
Renzi, P.
core +1 more source
Managing High-Risk Drug Interactions With Nirmatrelvir/Ritonavir: Experience From a Dedicated Pharmacology Advice Service. [PDF]
Clin Transl SciABSTRACT Nirmatrelvir boosted with ritonavir is a key antiviral against COVID‐19, yet ritonavir's potent CYP3A4 inhibition exposes patients to numerous drug–drug interactions. To make prescribing safer, a national proactive system providing expert pharmacology advice was implemented in France.
Libiad Y +7 more
europepmc +2 more sources