Results 31 to 40 of about 4,909 (228)
Organocatalytic asymmetric addition of malonates to unsaturated 1,4-diketones
Beilstein Journal of Organic Chemistry, 2012 The organocatalytic Michael addition of malonates to symmetric unsaturated 1,4-diketones catalyzed by thiourea and squaramide derivatives with Cinchona alkaloids afforded the formation of a new C–C bond in high yields (up to 98%) and enantiomeric ...
Sergei Žari +7 more
doaj +1 more source
Exploring the role of the α-carboxyphosphonate moiety in the HIV-RT activity of α-carboxy nucleoside phosphonates [PDF]
, 2016 As α-carboxy nucleoside phosphonates (α-CNPs) have demonstrated a novel mode of action of HIV-1 reverse transcriptase inhibition, structurally related derivatives were synthesized, namely the malonate 2, the unsaturated and saturated bisphosphonates 3 ...
Arnold, Eddy +6 more
core +1 more source
Angewandte Chemie, EarlyView.An enantioselective rhodium‐catalyzed [2 + 2 + 2] cycloaddition enables the synthesis of axially chiral diaryl ethers. Carbonyl coordination ensures high reactivity and regioselectivity, affording products bearing up to four stereogenic axes with good enantio‐ and diastereoselectivity.
Yu Sato +3 more
wiley +2 more sources
SYNTHESIS, CHARACTERIZATION AND THERMAL BEHAVIOUR OF HEAVY TRIVALENT LANTHANIDE MALONATES
Eclética Química, 2018 Solid-state Ln-L compounds, where Ln stands for heavy trivalent lanthanides (Tb-Lu) and L is malonate, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder ...
José Roberto Locatelli +3 more
doaj +1 more source
Molecules, 2013 Starting from benzofuran-2-methanal, 6-substituted benzothiazole-2-amines and malonic esters, sixteen title compounds were designed and synthesized seeking to introduce anti-TMV activity.
Meichuan Li +8 more
doaj +1 more source
Enantioselective isothiourea catalysed Michael-Michael-lactonisation cascade; synthesis of δ-lactones and 1,2,3,4-substituted cyclopentanes [PDF]
, 2017 The authors thank the EPSRC (ERTR – grant code EP/J500549/1; ABF - grant code EP/J018139/1), the Spanish government for a FPU Fellowship and the University of Seville (V Plan Propio de Investigación) for financial support (PER).
Elías-Rodríguez, Pilar +3 more
core +1 more source
Pyridine C─N Transposition via Cycloaddition–Cycloreversion
Angewandte Chemie, EarlyView.Transposition of pyridine nitrogen from the 4‐ to the 3‐position is described using two open and shut sequences: a nucleophile addition ring‐open ring‐closure, followed by a nitrile Diels–Alder cycloaddition cycloreversion. The nitrogen swap is particularly effective for tertiary alkyl substituents, transforming easily accessible para‐alkylated ...
Aífe Conboy, Michael F. Greaney
wiley +2 more sources
Beilstein Journal of Organic Chemistry, 2017 Diastereoselective radical coupling was achieved with chiral auxiliaries. The radicals were generated by anodic decarboxylation of five malonic acid derivatives. These were prepared from benzyl malonates and four menthol auxiliaries.
Matthias C. Letzel +2 more
doaj +1 more source
Pursuing Chemical Efficiency by Using Supported Organocatalysts for Asymmetric Reactions under Aqueous Conditions [PDF]
, 2015 Over the past decade, a great effort has been made by the chemical community to improve the efficiency of organic transformations and allow sustainable processes.
Alonso, Diego A. +6 more
core +2 more sources
Scientific Reports, 2017 A highly efficient and simple chemoselective aerobic oxidation of primary alcohols to either aldehydes or carboxylic acids in the presence of nitric acid was developed, utilising 5 wt% graphene oxide as a carbocatalyst under ambient reaction conditions ...
Yan Cui, Young Hee Lee, Jung Woon Yang
doaj +1 more source