Diethylamine dimethylamine

Amylamines Diethylamine Dimethylamine Adrenaline (side chain)... 

The preeminence of lithium and sodium in metal reductions has been challenged by the use of calcium in amines, developed by Benkeser. In the initial work, naphthalene was reduced to an 80 20 mixture of A -octalin (522) and A ( )-octalin (523) with lithium in diethylamine-dimethylamine. Replacing lithium with calcium gave a 77 23 mixture of 522 and 523 in 92% yield. This method has come to be called the Benkeser reduction. This has become an important modification because Birch reductions with sodium are... 

Cocamine Coco-1,3-propylene diamine diacetate Diethylamine Dimethylamine 2,6-Dimethyl heptanol-4 Disodium tallow sulfosuccinamate Ditallowamine Hydrogenated ditallowamine Hydrogenated rapeseed amine Hydrogenated tallowamine... 

A comprehensive study by Cheng investigated a wide variety of N-lithioamide precursors such as morpholine, diethylamine, dimethylamine, diisopropylamine, piperidine, 2,6-dimethylpiperidine, 2,2,6,6-tetramethylpiperidine, and piperazine in all cases the resulting lithium amides were reported to be insoluble in hexane. Polymerizations with these lithium amide initiators did not generally proceed to completion (67-95%) and no molecular weight or molecular weight distribution data were presented. 

Mono- and diethylamine, dimethylamine, and monoethanolamine can also be used to neutralize the acid, but the volumes must be checked to assiu-e sample... 

Amines Methylamine Dimethylamine Ethylamine Diethylamine Propylamine Dipropylamine Isopropylamine Diisopropylamine Butylamine ferf-Butylamine Allyl amine Cyclohexylamine... 

Rank methylamine, dimethylamine, and diethylamine in order of increasing base strength. Explain your rankings in relation to molecular structure. 

Figure 2, GC-TEA (N mode) chromatogram of a tire factory air sample. The column was a 5,5 m glass tube, 2mm, i,d, packed with Carbopak B(4% Carbowax 20 M, with 0,8% KOH on charcoal). Carrier gas flow rate was 15 mL/min, Column temperature was held at 40°C for 2 min, and then increased by 8°/min to 180°C, Peak identity 1-dimethylamine, 2-trimethylamine, 3-diethylamine, 4-tri-ethylamine, and 5-morpholine,...

NP=CHSiMe3, with diethylamine provides the aminophosphine Me SiNH-PNEt2(Cf SiMe ) which in turn adds a second mole of dimethylamine to give the novel phosphorus(III)-phosphorus(v) derivative 7. 

N-(2- [Ethoxy(methyl)phosphoryl]sulfanyl ethyl)-IV-isopropyl-N-methylpropan-2-aminium Iodide N-(2- [Ethoxy(methyl)phosphoryl]sulfanyl ethyl)-IV-isopropylpropan-2-aminium Chloride N-(2-Chloroethyl)dimethylamine N-(2-Chloroethyl)-N,N-dimethylamine N-(2-Hydroxyethyl)diethylamine N-(4-Oxy-3-methoxybenzyl)-8-methyl-6-nonenamide N-(Diethylamino)ethanol N-(Isopropyl)-2-propamine... 

The Sonogashira reaction is of considerable value in heterocyclic synthesis. It has been conducted on the pyrazine ring of quinoxaline and the resulting alkynyl- and dialkynyl-quinoxalines were subsequently utilized to synthesize condensed quinoxalines [52-55], Ames et al. prepared unsymmetrical diynes from 2,3-dichloroquinoxalines. Thus, condensation of 2-chloroquinoxaline (93) with an excess of phenylacetylene furnished 2-phenylethynylquinoxaline (94). Displacement of the chloride with the amine also occurred when the condensation was carried out in the presence of diethylamine. Treatment of 94 with a large excess of aqueous dimethylamine led to ketone 95 that exists predominantly in the intramolecularly hydrogen-bonded enol form 96. 

The photoamination of naphthalene, several substituted naphthalenes, anthracene and phenanthrene with ammonia, methylamine or benzylamine in aqueous acetonitrile in the presence of m-dicyanobenzene gave aminated dihydroarenes, e.g. 155. Secondary amines (dimethylamine and diethylamine) react less efficiently149. 9-Methoxyphenanthrene and... 

Better reagents than lithium aluminum hydride alone are its alkoxy derivatives, especially di- and triethoxyaluminohydrides prepared in situ from lithium aluminum hydride and ethanol in ethereal solutions. The best of all, lithium triethoxyaluminohydride, gave higher yields than its trimethoxy and tris(/er/-butoxy) analogs. When an equimolar quantity of this reagent was added to an ethereal solution of a tertiary amide derived from dimethylamine, diethylamine, W-methylaniline, piperidine, pyrrolidine, aziridine or pyrrole, and the mixture was allowed to react at 0° for 1-1.5 hours aldehydes were isolated in 46-92% yields [95,1107], The reaction proved unsuccessful for the preparation of crotonaldehyde and cinnamaldehyde from the corresponding dimethyl amides [95]. 

NCA polymerization by secondary amines may involve the amine or activated monomer mechanisms or both mechanisms simultaneously. Unhindered secondary amines such as dimethylamine and piperidine react like primary amines, and polymerization occurs by the amine mechanism. Polymerization by slightly hindered amines such as diethylamine, N-methylbenzylamine, and di-n-propylamine involves a combination of the amine and activated monomer mechanisms. More hindered secondary amines, such as di-n-isopropylamine and dicyclohexylamine, react almost exclusively via the activated monomer mechanism. 

Secondary amines, such as dimethylamine, diethylamine, diisopropylamine, dicyclohexylamine, A(-methylaniline, aziridine, and azetidine, are reported to undergo cis addition to acetylenic esters, giving rise to simple 1 1 Michael adducts, in each case. These adducts have been successfully employed in the synthesis of different heterocyclic compounds. 

Pure dioxane (70 ml) and powdered paraformaldehyde (30 g, corresponding to 1 mol of the monomer) are placed in the flask. Liquified dimethylamine (-0,3 mol), or diethylamine (-0,3 mol) is added at room temperature. The temperature of the mixture rises gradually to - 45 C. After cooling to room temperature, a second portion of - 0.3 mol of the amine is added. When the ensuing exothermic reaction has subsided, the remainder of the 1.2 mol of the amine is added at - 20 C. The conversion is completed by heating the mixture for 30 min at - 50 C. A slightly turbid solution is formed. 

Aliphatic Amines Butylamine Cyclohexylamine Dibutylamine Diethylamine Diethylenetriamine Dilsopropylamine Dimethylamine Di-n-propylamine Ethylamine Ethylenediamine Hexamethyleneimine Methylamine Morpholine Propylamine... 

In the absence of solvent, only syn stereoselectivity and not stereospecificity was observed for the nucleophilic addition of secondary amines such as dimethylamine, diethylamine, piperidine and morpholine to bicyclo[1.1.0]butane-l-carbonitrile. However, similar addition to 3-methylbicy-clo[l. 1.0]butane-l-carbonitrile was more stereoselective.22 However, the addition of sodium methancthiolate to 3-methylbicyclo[1.1.0]butane-l-carbonitrile, methyl bicyclo[l.l.0]butane-1-carboxylate, methyl 3-mcthylbicyclo[1.1.0]butane-l-carboxylate and methyl tricyclo[4.1.0.02 7]-heptane-l-carboxylate also afforded mixtures of cis- and p-rms-cyclobutancs in > 50% yield, with methyl bicyclo[1.1.0]butane-l-carboxylate showing greater anti stereoselectivity.23,24... 

Carbon disulphide reacts additively with primary and secondary aliphatic amines to form alkylammonium salts of alkyldithiocarbamic acids. The products obtained with dimethylamine, diethylamine and piperidine, also certain derivatives of these products, are manufactured on a large scale for use as accelerators in the vulcanisation of rubber. With aromatic amines the disulphide reacts with elimination of hydrogen sulphide and formation of substituted thio-ureas, e.g. thiocarbanilide. 

Other Compounds. Primary and secondary amines add 1,4- to isoprene (75). For example, dimethylamine in benzene reacts with isoprene in the presence of sodium or potassium to form dimethyl(3-methyl-2-butenyl)amine. Similar results are obtained with diethylamine, pyrrolidine, and piperidine. Under the same conditions, aniline and /V-methylaniline do not react. Isoprene reacts with phenol in the presence of aluminum phenoxide (76) or concentrated phosphoric acid (77) to give complex products. 

Complex salts of platinum ammines were also made with dimethylamine, diethylamine, pyridine, and diethylsulphine. 

The [2+2] cycloaddition reactions of various 4-dialkylamino-3-butyn-2-ones with substituted phenyl isothiocyanates in refluxing tetrahydrofuran gave access to a series of thietimines 92a-j in poor to satisfactory yields (Table 6) <2001SL361>. As it may be concluded from Table 6, when diethylamine derivatives were replaced by dimethylamine... 

It is known that an aroylacetylene undergoes cyclotrimerization in the presence of diethylamine or when refluxed in DMF [101-103]. Supposedly, a small amount of DMF solvent has decomposed at the high temperature (i.e., the boiling point of DMF) to release dimethylamine, which served as the catalytic species [103]. Our attempted polymerization carried out in the presence of diethylamine, however, produced polymers in very low yields (7-21%) [105]. Good to excellent polymer yields were achieved when the bis(aroylacetylene)s were refluxed in DMF/tetralin mixtures for 72 h. Our attempts to shorten the reaction time and to increase the polymer yield by using diphenylamine as the catalyst failed. Use of piperidine as the cata-... 

Analogues that are still legal can be synthesized by substituting equal molar amounts of source materials other than dimethylamine, which yields DMT, or diethylamine, which yields DET. Using dipropylamine as a starter yields DPT, methylethylamine yields methylethyltryptamine, methylpropyl-amine yields methylpropyltryptamine, ethylpropylamine yields ethylpropyl-tryptamine, etc. 

Secondary amines are of the type, (CH3)2NH, dimethylamine, where two Hs are replaced by a carbon group such as CH3. Similarly (CH3)(C2H5)NH is called methylethylamine and (C2H5)2NH called diethylamine. 

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