Ligand (L1/L2, 2 mmol) solution was prepared in dry toluene (50 mL) and was further treated with triethylamine
The fresh 3,5-dinitro benzoylchloride (2.30 g, 0.01 mol) dissolved in 10 mL of C[H.sub.2][Cl.sub.2] (MDC) was added dropwise to a solution containing a mixture of tryptamine (1.60 g, 0.01 mol) and triethylamine
(5.0 mL) in 20 mL of C[H.sub.2][Cl.sub.2] in an ice bath.
Separation was accomplished by using buffers: A (sodium acetate, pH 6.4, 5,000 ppm ethylenediaminetetraacetic acid (EDTA), triethylamine
(1:2,000) and 6%, v/v, acetonitrile) and B (60%, v/v, acetonitrile and 5,000 ppm EDTA).
All HPLC-grade solvents (acetonitrile, methanol, glacial acetic acid, and triethylamine
) were obtained from Fisher Scientific (Pittsburgh, PA, USA) and Merck Taiwan Ltd.
(iii) The hydrolysate is evaporated to dryness under a stream of nitrogen (repeated twice by adding a few drops of acetone) and amino acid silylated with 20 [micro]L of N-tert-butyldimethylsilyl-N-methyltrifluoroacetamide (MTBSTFA), 73 [micro]L of DMF (solvent), 2 [micro]L of triethylamine
(catalyst), and 5 [micro]L of hexadecane solution at 60[degrees]C for 30 min.
A methanolic solution of Zn[(Cl[O.sub.4]).sub.2] x 6[H.sub.2]O (0.89 mmol), 8mL, was mixed with another aqueous solution, 10 mL, of lisinopril dihydrate (3.40 mmol) and triethylamine
Brzezinski, "Formation of hydrogen-bonded chains through inter- and intra-molecular hydrogen bonds by 5,5'-dinitro-2,2'-biphenol with a strong base of guanidine-like character and triethylamine
," Journal of Molecular Structure, vol.
The catalytic Kharasch reaction of [alpha]-pinene, [beta]-pinene, limonene, limonene oxide, and valencene was studied using the iron acetylacetonate as catalyst and triethylamine
L-Aspartic acid (le) (7.98 g, 0.060 mol) and triethylamine
([NEt.sub.3]) (12.14 g, 0.12 mol) were dissolved in distilled water (250 mL), and Boc-Gly-ONSu (13.61 g, 0.050 mol) dissolved in 1,4-dioxane (250 mL) for 4 h was added to the solution.
The mobile phase was a solution of HPLC-grade methanol, water, glacial acetic acid and triethylamine
at a ratio of 1600:400:05:1 (RAO et al., 2004) which was injected into the system at a flow rate of 0.8ml/min after being filtered through a 0.45 mm membrane filter.
The compounds which are used depend on the surface activity of the silica/alumina coating and are typically triethylamine
(TEA), trimethylol propane (TMP), trimethylol ethane (TME), and low molecular weight polyethylene wax (PE).
A mixture of 4-chloro-3-nitro-2H-1benzopyran-2-one 2 (0.22 g, 1 mmol) in acetonitrile (5 mL) and 3-amino-5-mercapto-1,2,4-triazole 3a (0.115 g, 1 mmol) in acetonitrile (15 mL), containing triethylamine
(two drops) was refluxed in a water bath.