TBDMS protections were removed by treatment with triethylamine trihydrofluoride followed by filtration through an ion exchange cartridge. The oligomers were further purified by HPLC in a linear gradient of 50 mM ammonium formate in 1:1 acetonitrile/H2O and 50 mM ammonium formate in H2O. The ...
Shortsynthesisofbis-NHC-Pdcatalystderivedfromcaffeineanditsapplications toSuzuki,Heck,andSonogashirareactionsinaqueoussolution Fen-TairLuo * ,Hung-KunLo InstituteofChemistry,AcademiaSinica,Nankang,Taipei11529,Taiwan,ROC articleinfo Articlehistory: Received29September2010 Receivedinrevisedform 2November2010 Accepted...
trimethylol propane, linseed oil fatty acid, benzoic acid, phthalic anhydride and a natural resin modified phenolic resin and preparing the semiester by reaction with tetrahydrophthalic anhydride, followed by reaction with triethylamine and preparation of a lacquer by the addition of a drier; water and...
Received11September1995;acceptedinfinalform31October1995 Abstract Primaryandsecondarysolvationbindingconstantsandstoichiometriesarereportedfortheproticsolvationby pentadecafiuorooctanol(PFO)andtrifluoroethanol(TFE)ofthenon-bondingelectronsontriethylamine(TEA)and ontheoxygenoftheproton-transfercomplexformedbypentachloropheno...
Liquid paraffin-in-water emulsions stabilized by Laponite RD clay particles modified with short-chain aliphatic amines (diethylamine, DEA or triethylamine, TEA) were prepared in the absence of electrolytes. The formation and stability of the emulsions were investigated by macroscopic and microscopic ...
(I)complex P–Nbondcleavage X-raycrystalstructures Iron–phosphoruscovalentbond abstract Short-biteaminobis(phosphonite)containingolefinicfunctionalities,PhN{P(OC 6 H 3 (OMe-o)(C 3 H 5 -p)) 2 } 2 (1)wassynthesizedbyreactingPhN(PCl 2 ) 2 witheugenolinthepresenceoftriethylamine.Theligand1 ...
Compound 8 was treated with tert-butoxycarbonyl-L-ornithine under HATU coupling conditions to afford boc-compounds 18a in 82% yield; meanwhile, Compound 8 was reacted with di-boc-L-lysine hydroxysuccinimide ester in the presence of triethylamine to give product 18b. The removal of the boc ...
A triethylamine-4- (dimethylamino)-pyridine stock solution [TEA-DMAP stock solution: DMAP (8.9 mg, 73.2 µmol) dissolved in TEA (2.00 mL, 14.3 mmL)] was added to the sodium sulfate-dried ethyl acetate extract of the reaction (500 µL, contains 10.0 mM of 2-octanol) (TEA: ...
Determining the pKa of key functional groups is critical to understanding the pH-dependent behavior of biological proteins and peptide-based biomaterials. Traditionally, 1H NMR spectroscopy has been used to determine the pKa of amino acids; however, for