Results 51 to 60 of about 8,540 (213)

Volatile Profile Characterization of Croatian Commercial Sparkling Wines

open access: yesMolecules, 2020
Commercial sparkling wine production represents a relatively low but important part of the Croatian wine production, especially in the Zagreb county.
Ana-Marija Jagatić Korenika   +3 more
doaj   +1 more source

Synthesis of 3α,12α-dihydroxy-23a, 23b-dihomo-5β-cholan-24-oic acid [PDF]

open access: yesJournal of the Serbian Chemical Society, 2004
A novel multi-step synthesis of 3α,12α-dihydroxy-23a,23b-dihomo-5β-cholan 24-oic acid (23a,23b-dihomodeoxycholic acid) (5) has been achieved from methyl 3α,12α-dihydroxy-5β-cholanoate (1).
Ćirin-Novta Vera S.   +3 more
doaj   +1 more source

Gas phase carbon acidity and correlations with aqueous pK~a~ values: A comparison of B3LYP/6-311++G(d,p), Gaussian-4 (G4), and experimental approaches [PDF]

open access: yes, 2010
Gas phase standard state (298.15 K, 1 atm) calculations were conducted at the B3LYP/6-311++G(d,p) density functional and the Gaussian-4 (G4) composite method levels of theory to estimate the acidity of various carbon acids.
Kaya Forest, Sierra Rayne
core   +2 more sources

The degradation of L-lysine in guinea pig liver homogenate: formation of alpha-aminoadipic acid [PDF]

open access: yes, 1948
A summary of the little that is known of the metabolism of lysine in animals is as follows: it is indispensable in the diet, its α-amino group does not participate in reversible transamination reaction in vivo (2), neither the L nor D form is attacked by
Borsook, Henry   +4 more
core   +1 more source

Synthesis and Activity of Six-Membered Cyclic Alkyl Amino Carbene–Ruthenium Olefin Metathesis Catalysts [PDF]

open access: yes, 2020
Ru–cyclic alkyl amino carbene (Ru–CAAC) olefin metathesis catalysts perform extraordinarily in metathesis macrocyclization and ethenolysis, but previous studies have been limited to the use of five-membered CAAC (CAAC-5) ligands.
Grubbs, Robert H.   +4 more
core  

Mn-mediated sequential three-component domino Knoevenagel/cyclization/Michael addition/oxidative cyclization reaction towards annulated imidazo[1,2-a]pyridines

open access: yesBeilstein Journal of Organic Chemistry, 2018
The sequential three-component reaction between o-hydroxybenzaldehydes, N-(cyanomethyl)pyridinium salts and a nucleophile towards substituted chromenoimidazopyridines under oxidative conditions has been developed. The employment of Mn(OAc)3·2H2O or KMnO4
Olga A. Storozhenko   +5 more
doaj   +1 more source

Chiral benzimidazoles as hydrogen bonding organocatalysts [PDF]

open access: yes, 2015
Several bifunctional organocatalysts bearing the benzimidazole unit have been designed in order to act as bifunctional systems by hydrogen bonding. Chiral 2-aminobenzimidazoles are conformational rigid guanidines able to catalyze enantioselectively ...
Nájera, Carmen, Yus, Miguel
core   +2 more sources

Esterification of dicarboxylic acids to diesters over Mn+-montmoril lonite clay catalysts [PDF]

open access: yes, 2005
Esterification of dicarboxylic acids with various alcohols and phenols in presence of metal exchanged montmorillonite clay catalyst (Mn+-mont; Mnþ ¼ Al3þ, Fe3+, Cr3+, Zn2+, Mn2+, and Ni2+) is studied.
Gopalpur Nagendrappa, .   +3 more
core   +1 more source

Preparation of diethyl malonate adducts from chalcone analogs containing a thienyl ring

open access: yesBulletin of the Chemical Society of Ethiopia, 2010
Nine chalcone-diethyl malonate derivatives (4a-i) were prepared by the reaction of chalcone derivatives (3a-i) with diethyl malonate in the presence of a catalytic amount of KOt-Bu in CH2CI2 in good to excellent yields. The products were characterized by
Yakup Budak   +3 more
doaj  

Crystal structure and Hirshfeld surface analysis of diethyl 2-[4-(4-fluorophenyl)-2-methyl-4-oxobutan-2-yl]malonate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2018
The title compound, C18H23FO5, was synthesized by reacting diethyl malonate with 1-(4-fluorophenyl)-3-methylbut-2-en-1-one. The molecule adopts a loose conformation stabilized by weak C—H...O and C—H...π interactions.
Sandeep Chandrashekharappa   +4 more
doaj   +1 more source

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