Alkyl-dimethyl

FiaaHy, a-olefias find their way iato the surfactant and disiafectant market through conversion, first to alkyl dimethyl amine, then to benzyl chloride quats (BAUMAC) and amine oxides. The former are used broadly as disiafectants, often ia combination with cleaning products. The latter is a direct active ia consumer and iadustrial cleaning products. 

Linear alpha-olefins are the source of the largest volume of ahphatic amine oxides. The olefin reacts with hydrogen bromide in the presence of peroxide catalyst, to yield primary alkyl bromide, which then reacts with dimethylamine to yield the corresponding alkyl dimethyl amine. Fatty alcohols and fatty acids are also used to produce amine oxides (Fig. 1). 

AHphatic amine oxides such as alkyl dimethyl amine oxides and aLkylbis(2-hydroxylethyl)amiae oxides range from practically nontoxic to slightly toxic (79). Reported LD qS range from 1.77 g/kg to 6.50 g/kg. The commercial concentrated products are primary skin and eye irritants. At concentrations of 2%, these products may be considered as nonirritating to the skin or eye. 

Alkyl dimethyl c o c o alkyl dime thyl arnine s Tertiary amines [61788-93-0] -22... 

QuaterniZation. Quaternary ammonium compounds are formed by alkylation of alkyl, alkyl dimethyl, dialkyl, and dialkylmethyl fatty amines with methyl chloride, dimethyl sulfate, or benzyl chloride (1,3,7,12,29). 

Alkyl dimethyl and dialkylmethyl tertiary amines are commercially available. These amines are prepared by reductive methylation of primary and secondary amines using formaldehyde and nickel catalysts (1,3,47,48). The asymmetrical tertiary amines are used as reactive intermediates for preparing many commercial products. 

The major source of raw materials for the preparation of fatty amines is fats and oils such as tallow, and coconut, soya, and palm oils. Ethyl Corporation uses petrochemicals as raw materials to prepare alkyl dimethyl and dialkylmethyl tertiary fatty amines, trademarked as AE)MA and DAMA products, which can be suppHed as single-carbon chain-length cuts or custom blends (13). Commercially available high purity fatty amines are Hsted in Table 3. Cost of the amines can vary owing to supply of raw materials. 

Preparation of (Me0)2P-0-R ROH, (MeO)3P, CBr4, Pyr, 70-98% yield. The alkyl dimethyl phosphite may then be oxidized to the corresponding phosphate by aq. iodine, t-butyl hydroperoxide, or peracid. 

N-Alkyl-dimethyl-amine konnen in einem Eintopfverfahren aus Isothiocyanaten mit Lithiumalanat und nachfolgendes Kochen mit Ameisensaure-athylester erhalten werden (s.a. S. 242f.)3 ... 

Alkyl dimethyl glycinates, 24 148 Alkyl diphenyl phosphates, 11 494 Alkyl dithiocarbazate esters, 13 568 Alkyleneamine, pK values, 8 487t Alkylenediamines, 8 485 Alkylene terephthalate polymers, 20 32 Alkyl ether phosphates, 24 146 Alkyl ethers, 10 574, 575 uses for, 10 580-581 Alkyl fumarates, 15 491... 

The first examples of optically active acyclic alkyl dimethyl-amidosulfites 103 with sulfur as the sole chiral atom were prepared (149) according to the reaction sequence shown in Scheme 5 from achiral alcohols and (+)-a-phenylethyl isothiocyanate as an asymmetric reagent. Optically active amidothiosulfites 104 were also synthesized using the same approach (150). 

Nach dem gleichen Prinzip verlauft die (asymmetrische) Synthese von Alkyl-dimethyl-aminen durch elektrophile Aminierung von geeigneten Alkyl-lithium-Verbindungen bzw. Alkyl-magnesiumhalogeniden mit dem aus ( —)- bzw. ( + )-Ephedrin hergestellten ( — )-bzw. (+ )-3,4-Dimethyl-2-dimethylaminooxy-2-oxo-5-phenyl-l, 3,2(A5)-oxazaphospho-... 

Cerium(IV) ammonium nitrate, 67 Methylation (see also Alkylation) Dimethyl sulfate, 239 Trimethyloxonium tetrafluoroborate, 327 Methylenation of carbonyl groups... 

Surface Alkylated dimethyl aniline, Alkylated pyridine, Heparin content,... 

Miscellaneous. The amine oxides used in household products are generally alkyl dimethyl amine oxides and are prepared from alcohols as shown below ... 

These alkyl dimethyl amine oxides are used as foam stabilizers primarily in light-duty liquids and shampoos where the major active ingredient is either an alcohol ether sulfate or an alcohol sulfate. The alkyl group is usually C19 to C.. which gives the best overall foam stability (3). 12 14... 

Chlormethyl-phosphanoxide setzen sich mit Nukleophilen unter Austausch des Chlor-Atoms um. So erhalt man beispielsweise aus Chlormethyl-dimethyl-phosphanoxid und dem Natriumsalz aromatischer oder heteroaromatischer Carbonsauren (1-Aroyloxy-alkyl)-dimethyl-phosphanoxide394,39S ... 

Methyl and ethyl trifluoromethanesulfonates were used to alkylate dimethyl tellurium9,10. When a compound with two organotelluro groups linked by a chain of methylene groups is treated with methyliodide in acetone, both tellurium atoms are methylated11. 

We have already seen the solution to this problem in Chapter 43. If we use symmetrical hydrazine, we can deal with the selectivity problem by alkylation. Dimethyl sulfate turns out to be the best... 

In the present paper, we will focus in a first step, on the results obtained using the same parent support (silica gel) modified by alkyl-dimethyl chlorosilanes of various alkyl chain length 1, 4, 8 and 18 carbon atoms. This material presents a disordered mesoporous texture [8]. 

Sandia National Laboratories decontaminating foam (licensed to Modec Inc., Denver, Colorado) is a solution (MDF-100) composed of two parts part a a solution of 6.6% V,VAUV"dV -penta-methyl,-V -tallow alkyl 1,3-prop-anamine diammonium 2.6% tallow pentamethyl propane quaternary ammonium compounds benzyl-C12-18 alkyl dimethyl 1% isopropyl alcohol, and part b a solution of 8% hydrogen peroxide. Mixing the two parts results in a foamlike product which lasts for up to 30 min (Figure 71.2). 

Many other groups may be present in the alcohol or phenol during alkylation. Dimethyl sulfate and chlorohydrins give chloro ethers. Halo ethers are also prepared by the action of this reagent on halogenated phenols, e.g., w-bromoanisole (91%)- Phenolic aldehydes are converted in excellent yields to alkoxy aldehydes with dimethyl sulfate or alkyl p-toluenesulfonates. The conversion of a phenolic ketone to an alkoxy ketone is illustrated by the preparation of p-methoxypropiophenone (88%). Phenolic acids, esters, and cyanides, and nitrophenols respond favorably to this method for methylation. The sodium salt of mandelic acid, C H, CHOHCOOH, is methylated with dimethyl sulfate to furnish, after acidification, a-methoxyphenylacetic acid (42%). ... 

Alkylbenzyldimethylammonium chloride alkyl dimethyl benzyl ammonium chloride BKC Hyamine 3S00 Pentonium Zephiran. 

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