Methylamine tri

Amine Methylamine (primary) Di methylamine (secondary) Tri methylamine (tertiary)... 

Nucleophilic substitution at an alkyl carbon is said to alkylate the nucleophile. For example, the above reaction between RI and NMe3 is an alkylation of tri-methylamine. Similarly, nucleophilic substitution at an acyl carbon is an acylation of the nucleophile. 

Auch die Atherate und Aminate der Alkylalane sind in Benzol- bzw. Cyclohexanlosung assoziiert. Dabei neigen die Alkylalan-Trimethyl-amin-Verbindungen starker zur Dimerisation als die Dialkylalan-Tri-methylaminate (vgl. Tab. 7). 

Effect of Solvent and Base on the Ruthenium Carbonyl/Tri-methylamine System. Solvent plays an important role in the rate of hydrogen production. The ideal solvents are tetrahydrofuran, diglyme, and dimethoxyethane. Alcohols are only slightly less effective. Apparently the solvent must be miscible with water, promote ion formation, and be capable of weakly coordinating with the coordinately unsaturated species formed in the course of the reaction. 

Additional Comments Regarding the Ruthenium Carbonyl-Tri-methylamine WGSR System. A potential mechanistic pathway for a WGSR system involves the production of formate, followed by its catalytic decomposition ... 

Figure 13. Separation of methylamines and methylamine-N-oxides from standard solutions. Analytes 1-sodium, 2-ammonium, 3-methylamine (195 pg/L), 4-dimethylamine (390 pg/L), 5-trimethylamine-N-oxide (465 pg/L), and 6-tri-methylamine (615 pg/L) [27],...

The following amine boranes are manufd by the Callery Chemical Co a)Dimethylamine-borane, (CH,)aNH BHS, wh solid b)Tri-methylamine-borane, (CHS)SN BH, wh solid e)Pyridine-borane, CBHSN BHb, col liquid These amine-boranes are relatively stable complexes and are of interest because they act as selective reducing agents, polymerization catalysts, anti-oxidants and stabilizing agents. They may also be used for the prepn of diborane and as petroleum additives. Further information may be obtained from Tech Bull C-200(Ref 2)... 

It has been reported that a variety of single-chain amphiphiies spontaneously produce stable, membrane-forming aggregates when dispersed in water 258 260). Dialky 1-amphiphile l-III (l or d means l- or D-configuration of amino acid unit in compound III, respectively), which was prepared by condensation of didodecyl L-glutamate and p-(4-bromobutoxy)benzoic acid and the subsequent quarterization with tri-methylamine, produces bilayer vesicles in water as probed by electron microscopy 251 >. 

Figure 15-9 Stereoscopic view of the large domain (residues 1-383) of tri-methylamine dehydrogenase from a methylotrophic bacterium. The helices and 3 strands of the (aP)8 barrel are drawn in heavy lines as are the FMN (center) and the Fe4S4 iron-sulfur cluster at the lower right edge. The a/P loop to which it is bound is drawn with dashed lines. The 733-residue protein also contains two other structural domains. From Lim et al.150 Courtesy of F. S. Mathews.

R. Ayesh, R.L. Smith, Genetic Polymorphism of Tri-methylamine M-Oxidation , Pharmacol Ther., 45, 387-401 (1990). 

To isolate the neat product, the more volatile ether/tri-methylamine combination was used in the reaction, because a higher recovery of product was obtained in trials conducted with the racemic material. However, the neat, distilled, optically active product proved to be stereochemically labile at ambient temperature, and was considerably racemized compared to that obtained directly in the benzene/triethylamine solution. Moreover, the latter was relatively stable when further diluted in benzene solution at ambient temperature, showing only a 14% decrease in optical rotation after 70 hours at 26. For stereochemical studies,... 

The compound of Micheel and Micheel was obtained in small amount after treatment of 2,3,4,6-tetra-O-acetyl-a-D-mannosyl bromide with tri-methylamine the bulk of the material remained unchanged. The product apparently resulted from hydrolysis by moisture from the air. The composition was established by analyses, but the identification was reported with a question mark. A 2,3,4,6-tetra-O-acetyl-D-mannose with different physical constants (m.p. 93°, [c ]d +26.3°) was obtained by Levene and Tipson63b by the deliberate addition of water and silver carbonate to tetra-O-acetyl-D-mannopyranosyl bromide its structure was confirmed by conversion to the known pentaacetates. If Micheel and Micheel were correct in their identification, the two acetates could be anomers. The acetylation and deacetylation reactions performed by Maurer and Bohme are additional evidence in favor of this relationship. 

The borane is prepared by reaction of B—CH30-9-BBN with CH3Li and then tri-methylamine oxide. 

Raymond, J.A., and A.L. DeVries (1998). Elevated concentrations and synthetic pathways of tri-methylamine oxide and urea in some teleost fishes of McMurdo Sound, Antarctica. Fish. Physiol. Biochem. 18 387-398. 

Sujishi, S., and S. Witz Effect of replacement of carbon by silicon in tri-methylamin on the stabilities of the trimethylboron addition compounds. Estimation of the resonance energy for the Si—N-partial double bond. J. Amer. chem. Soc. 76, 4631—4636 (1954). 

The first reported monomeric pyrazol-l-ylborane, i.e., a species not dimerized to a pyrazabole structure (see Sect. IV.), was 3,5-bis(trifluoromethyl)pyrazol-l-ylbor-ane However, this compound is known only as its 1 1 molar adduct with tri-methylamine, i.e., it contains four-coordinate boron. The first monomeric pyrazol-l-ylborane containing trigonal boron was reported in 1980 l,3-dimethyl-2-(l-pyrazolyl)-l,3,2-diazaboracyclohexane, 4, was obtained on condensation of pyrazole with l,3-dimethyl-l,3,2-diazaboracycIohexane ... 

Measurements of k6 for proton exchange between ammonia and tri-methylamine make it possible to decide which of these steps are rate-determining [69]. Values of k6 were found to be experimentally indistinguishable from zero. Since NH3 and H20 are sterically similar, k6 would be expected to be similar to kn if step (iii) were rate-determining, so that step (ii) must be the rate-determining step, slowed down by steric hindrance from the methyl groups. 

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