Results 31 to 40 of about 92,196 (294)

Chiral phosphoric acid-catalyzed enantioselective phosphinylation of 3,4-dihydroisoquinolines with diarylphosphine oxides

Communications Chemistry, 2023
Catalytic enantioselective phosphinylation of imines with diarylphosphine oxides is a powerful approach to access chiral α-amino diarylphosphine oxides.
Yongbiao Guo, Ning Li, Junchen Li, Xiaojing Bi, Zhenhua Gao, Ya-Nan Duan, Junhua Xiao   +6 more
doaj   +1 more source

Potentiodynamic and Quantum Studies of Some Amino Acids as Corrosion Inhibitors for Copper

International Journal of Electrochemical Science, 2012
A comparative study of different types of amino acids: proline, cysteine, phenyl alanine, alanine, hisitidine and glycine as inhibitors for copper corrosion in 8M phosphoric acid at different temperatures was carried out. Potentiodynamic polarization and
H.H. Abdel Rahman, A.H.E. Moustafa, M.K. Awad   +2 more
doaj   +1 more source

Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]

, 2016
This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima, Lassaletta, José M., Matador Martínez, Esteban, Monge Fernández, David, Retamosa Hernández, María Gracia   +4 more
core   +1 more source

Chiral separation by enantioselective liquid–liquid extraction [PDF]

, 2011
The literature on enantioselective liquid–liquid extraction (ELLE) spans more than half a century of research. Nonetheless, a comprehensive overview has not appeared during the past few decades.
Feringa, Ben L.,, Heeres, Hero J.,, Minnaard, Adriaan J.,, Schuur, Boelo,, Verkuijl, Bastiaan J.V.,, Vries, Johannes G. de,   +5 more
core   +3 more sources

Use of acids as additives in sugarcane silage

Revista Colombiana de Ciencias Pecuarias, 2015
Background: sugarcane silage often becomes a problem for the producers due to its high population of yeast and its high content of soluble carbohydrates.
Eric HCB van Cleef, Anibal C Rêgo, René M Patiño, Flavia O Scarpino van Cleef, Jane MB Ezequiel   +4 more
doaj   +1 more source

Syntheses of (+)-30-epi-, (-)-6-epi-, (±)-6,30-epi-13,14-didehydroxyisogarcinol and (±)-6,30-epi-garcimultiflorone A utilizing highly diastereoselective, Lewis acid-controlled cyclizations [PDF]

, 2016
The first syntheses of 13,14-didehydroxyisogarcinol (6) and garcimultiflorone A (5) stereoisomers are reported in six steps from a commercially available phloroglucinol.
Boyce, Jonathan H., Eschenbrenner-Lux, Vincent, Porco, John A.   +2 more
core   +1 more source

Insights on Molecular Characteristics of Hydrochars by ¹³C-NMR and Off-Line TMAH-GC/MS and Assessment of Their Potential Use as Plant Growth Promoters

Molecules, 2021
Hydrochar is a carbon-based material that can be used as soil amendment. Since the physical-chemical properties of hydrochar are mainly assigned to process parameters, we aimed at evaluating the organic fraction of different hydrochars through 13C-NMR ...
Laís G. Fregolente, João Vitor dos Santos, Giovanni Vinci, Alessandro Piccolo, Altair B. Moreira, Odair P. Ferreira, Márcia C. Bisinoti, Riccardo Spaccini   +7 more
doaj   +1 more source

Asymmetric additions to dienes catalysed by a dithiophosphoric acid. [PDF]

, 2011
Chiral Brønsted acids (proton donors) have been shown to facilitate a broad range of asymmetric chemical transformations under catalytic conditions without requiring additional toxic or expensive metals.
Hamilton, Gregory, Rauniyar, Vivek, Shapiro, Nathan, TOSTE, F. Dean, Wu, Jeffrey   +4 more
core   +2 more sources

Inhibitors of lipid phosphatidate receptors: N-palmitoyl-serine and N-palmitoyl-tyrosine phosphoric acids

Journal of Lipid Research, 1996
An improved synthesis of two lipid phosphoric acids, N-palmitoyl-L-serine phosphoric acid (NP-Ser-PA) and N-palmitoyl-L-tyrosine phosphoric acid (NP-Tyr-PA), from the benzyl esters of L-serine and L-tyrosine is described.
R Bittman, B Swords, K Liliom, G Tigyi
doaj   +1 more source

Chemical composition and structural changes of porous templates obtained by anodising aluminium in phosphoric acid electrolyte [PDF]

, 2010
Ordered anodic aluminium oxide (AAO) filmswere first prepared by anodising in a phosphoric acid electrolyte and then studied extensively and characterised by field emission gun-scanning electron microscopy (FEG-SEM), X-ray diffraction, Raman and infrared
Arurault, Bocchetta, Burgos, Farnan, Fernandez-Romero, Jessensky, Keller, Kirchner, Mardilovich, Mason, Masuda, Mata-Zamora, Melendres, Ono, Raveh, Sharma, Sui, Takahashi, Thibault, Thompson, Trambouze, Wada   +21 more
core   +2 more sources