Triethylamine containing

Inhibition of Biosynthesis. Triethylamine derivatives such as 2-(4-ethylphenoxy)triethylamine and 2-(3,4-dimethylphenoxy)-triethylamine markedly inhibit the accumulation of limonoids in citrus leaves (15). For example, young lemon leaves sprayed with 500 ppm of 2-(4-ethylphenoxy)triethylamine contained only 27 ppm of XIV 8 days after the treatment, whereas the control contained 344 ppm. Similarly, those sprayed with 300 ppm of the compound contained 0.3 times as much XIV as the control. 

Five chiral calcium antagonists (including nimodipine) were separated using p-cyclodextrin as the stationary phase in a Merck Chiradex column (25 cm x 4.6 mm i.d.) with 0.1% triethylamine containing 5-100% of... 

Formation of the mixed anhydride is slow in dichloromethane if the base is triethylamine. Esterification is inefficient in the absence of tertiary amine. Products prepared using N-methylmorpholine were enantiomerically pure. Products prepared using triethylamine should be isolated within 30 minutes to avoid enantiomerization of the ester that occurs in the presence of tertiary amine Z-Phe-ONp obtained using 0.2 equivalents of triethylamine contained 0.35% of the o-isomer. Yields are lower for valine because of its (3-methyl substituent. Higher yields are obtained if the reagent is isopropyl chloroformate. The method worked well for fatty acids and Z-y-Abu-OSu that was not accessible using DCC, but is not... 

In general, exocyclic double bonds are reduced more easily by catalytic hydrogenation than endocyclic double bonds, but sometimes in a less diastereoselective manner. Hydrogenation of the exocyclic methylene derivative 3 in triethylamine containing a catalytic amount of methanol quantitatively affords a mixture of the epimeric methyl derivatives in an 85 15 ratio with 6/1-4 as the major isomer6. 

Mobile phase Gradient. MeCN buffer from 9 91 to 35 65, re-equilibrate at initial conditions for 5 min. (Buffer was 0.16% triethylamine containing 0.08% orthophosphoric acid (85%), pH 4.2.)... 

The action of terminal alkynes 63 (R=Bu, CH2OH, Ph or SiMe3) on 2,5-dibromopyridine in triethylamine containing bis(triphenylphosphine)palladium dichloride and copper(I) iodide results in the 2-alkynyl compounds 64 regiospecifically. ... 

It is well known that alk-2-ynones can be prepared from a copper(i) alkyne and an acyl halide. Now the troublesome metallation step can be avoided by direct reaction of the terminal alkyne with the acyl chloride in triethylamine containing copper(l) iodide and bis(triphenylphosphine)palladium(ii) chloride as catalysts. Cyanohydrins and propargyl bromides form alkynyl ethers which rearrange on treatment with lithium di-isopropylamide to form ar-allenic ketones (Scheme 59). ... 

LC-UVWIS, C18 column with MeOH 0.1% triethylamine containing 20 mM acetate buffer pH 5.2 as mobile phase... 

Formic acid behaves differently. The expected octadienyl formate is not formed. The reaction of butadiene carried out in formic acid and triethylamine affords 1,7-octadiene (41) as the major product and 1,6-octadiene as a minor product[41-43], Formic acid is a hydride source. It is known that the Pd hydride formed from palladium formate attacks the substituted side of tt-allylpalladium to form the terminal alkene[44] (see Section 2.8). The reductive dimerization of isoprene in formic acid in the presence of Et3N using tri(i)-tolyl)phosphine at room temperature afforded a mixture of dimers in 87% yield, which contained 71% of the head-to-tail dimers 42a and 42b. The mixture was treated with concentrated HCl to give an easily separable chloro derivative 43. By this means, a- and d-citronellol (44 and 45) were pre-pared[45]. 

Acyl derivatives of azoles containing two different environments of nitrogen atoms can rearrange. For example, 1-acyl-1,2,3-triazoles are readily isomerized to the 2H-isomers in the presence of triethylamine or other bases the reaction is intermolecular and probably involves nucleophilic attack by N-2 of one triazole on the carbonyl group attached to another (74AHC(16)33). 

A 600-mL, three-necked, round-bottomed flask 1s equipped with a mechanical stirrer, a short gas inlet tube, and an efficient reflux condenser fitted with a potassium hydroxide drying tube. The flask is charged with 13.4 g (0.05 mol) of 3-ben2y1-5-(2-hydroxyethyl)-4-methyl-l,3-th1azol1um chloride (Note 11, 72.1 g (1.0 mol) of butyraldehyde (Note 2). 30.3 g (0.3 mol) of triethylamine (Note 2), and 300 raL of absolute ethanol. A slow stream of nitrogen (Note 3) is begun, and the mixture is stirred and heated In an oil bath at 80°C. After 1.5 hr the reaction mixture is cooled to room temperature and concentrated by rotary evaporation. The residual yellow liquid Is poured Into 500 mL of water contained 1n a separatory funnel, and the flask is rinsed with 150 mL of dichloromethane which is then used to extract the aqueous mixture. The aqueous layer is extracted with a second 150-mL portion of... 

A tertiary amine such as triethylamine is then added to the isocyanate-terminated prepolymer (containing carboxylic acid groups). The tertiary amine reacts with the pendant carboxylic acid groups, forming a carboxylic acid salt. The presence of this salt, together with adequate stirring, allows the dispersion of the prepolymer in water by the so-called melt dispersion process [57]. 

Electrochemical oxidation of 1,2-dihydronaphthalene or an indene in acetoni-tnle containing triethylamine tris(hydrogen fluoride) provides a mixture of tereoisomeric difluorides and vicinal fluoroacetamides [201] (equation 38)... 

To a solution of 112 (2.0 g, 43.0 mmol) in 50 mL of dry THF at -65°C was added a solution of 111 (4.45 g, 34.0 mmol) in 100 mL of absolute ethanol containing 5 mL of acetic acid cooled to - 65°C in one portion. After stirring for 15 min., dry triethylamine (4.8 g, 510 mmol) was added. The reaction continued for 24 h with slow warming to room temperature before reducing the volume to 10 mL. The crude 113 was brought to pH 10 with potassium carbonate. The aqueous solution was continuously extracted with chloroform, dried (K2CO3), evaporated onto neutral alumina, placed on a column of neutral alumina (50 g) and eluted with chloroform. The solvent was evaporated and the residue crystallized from ethanol to yield 113 (2.86 g 55%). The yellow solid had a mp = 72.5-73.8°C. 

Nickel catalysts have been used for many dehydrohalogenations (30), but these catalysts are much more suspectible to poisoning by halide ion than are noble metals. As a result, the catalyst-to-substrate ratio must be much higher when using nickel, and reduction times are apt to be lengthy (36). Reductive deiodination of 6 to 7 was achieved over Raney nickel in methanol containing triethylamine. Despite massive loadings, the reduction was slow (20). 

A solution of bis-triethylamine phosphate was prepared by slowly adding 2.36 ml of B5% phosphoric acid to 20 ml of acetonitrile containing 9.9 ml of triethylamine at 20°C. This solution was added to a stirred solution of 4.70 g of 9a-fluoro-11(3,170,21 -trihydroxy-160-methyl-1,4-pregnadiene-3,20-dione 21 -methanesulfonate and 20 ml of acetonitrile. The mixture was heated under reflux for four hours and then evaporated under reduced pressure to a volume of 12 ml. This mixture was a concentrated solution of 9a-fluoro-11(3,170,21 -tri-hydroxy-160-methyl-1,4-pregnadiene-3,20-dione 21 -phosphate triethylamine salt with some inorganic phosphate. 

A mixture of 142.5 g of "Rosin Amine D" containing about 70% dehydroabietylamine and 30% dihydro and tetrahydroabietylamine, 47.0 g of ethylene dibromide, and 60.6 g of tri-ethylamine is dissolved in 350 cc of anhydrous xylene and refluxed for about 16 hours. Thereafter the triethylamine dibromide salt formed Is separated from the solution by filtering the cool reaction mixture and washing with ether. The solution is then concentrated under reduced pressure to dryness to remove the ether, xylene and excess triethylamines present. 

---