Ethyl methylether

Schmidt s (1992) investigation of students conceptions (12th grade) concerning isomerism showed that students mostly regard substances from the same material type (acids, ethers) as isomers n-propanol and isopropanol, for example, are regarded as isomers, whereas propanol and ethyl-methylether are not considered to be isomers. In contrast to Schmidt s hypotheses, the shape (rod-like, cross-shaped) of the molecules was not so important for their choice. 

The desired 4-ethylamino-3,4-dihydro-2-(3-methoxy)propyl-2H-thieno[3,2-e]-l,2-thriazine-6-sulfonamide-l,1-dioxide was prepared according to described above procedure for 3,4-dihydro-4-hydroxy-2-(2-methoxy)ethyl-2H-thieno[3,2-e]-l,2-thiazine-6-sulfonamide-l,l-dioxide substituting 2-bromoethylmethylether for 2-(bromomethyl)ethyl-methylether. 

Ethyleneglycol Monoalkyl Ethers are compds of general formula RO,CH2.CH2.OH where R stands for methyl, ethyl, proply, butyl, etc radicals. They are described here as Ethyleneglycol Butyletber, Ethyleneglycol Ethyl-ether and Ethyleneglycol Methylether. Their, toxicities are described in the following refs ... 

Tririitrodimethoxybenzene, it yel ndls (from ale), mp 174° si sol in ethyl acetate diffc sol in chlf, ale 8t acetic acid obtd by reaction of 2,4,6-trinitro-brenzcatechin-l- v methylether, dimethylsulfate Na2C03 in hot xylene (Ref 6)... 

Trimethyl-l,3-dioxane-2-yl)thiophene 2-Bromoethyl methylether 2-(Bromomethyl)ethyl methyl ether Propylamine... 

A solution of the above product (19.2 g, 0.093 mol) in DMF (125 mL) was added to a suspension of sodium hydride (3.08 g, 80% oil dispersion, 0.103 mol) in DMF at 006. When the addition was completed the ice bath was removed and the reaction 20 mixture stirred at ambient temperature for 1 h. The reaction mixture was cooled to 0°C and 2-bromoethyl methylether (13.6 mL, 0.14 mol) was added. The reaction mixture was stirred at ambient temperature for 18 h after which time it was evaporated to dryness. The residue was suspended in brine (100 mL) and extracted with methylene chloride (4x80 mL). The combined extracts were dried (MgS04), filtered and evaporated to a solid which was recrystallized from ethyl acetate to give the desired subject (17.4 g). Chromatography of the mother liquor (silica, 3% ethanol/methylene chloride) furnished more subject which was combined with the first batch to give a total of 19.3 g (78%) of 3,4-dihydro-4-hydroxy-2-(2-methoxy)ethyl-2H-thieno[3,2-e]-l,2-thiazine 1,1-dioxide. 

The reaction of glycidyl acrylate with a-(2-carboxyethyl)benzoin methyl ether has allowed one to obtain [101] the corresponding acrylic monomer which, upon copolymerization with different amounts of MMA, butyl methacrylate and 2-(V, V-dimethylamino)ethyl methacrylate, gives rise to polymeric photoinitiators, containing side-chain benzoin methylether moieties, for photocurable coatings ... 

Chrom(VI)-oxid in Eisessig/Dichlormethan spaltet bei 20 Ethyl-hexadecyl-ether in Hexa-decansdure (55%), wahrend der Methylether in 48% Ausbeute Ameisensaure-hexade-cylester ergibt26. 

Bifunctional cyclic carbonates with two six-membered rings, as for example bis(5-ethyl-2-oxo-l,3-dioxan-5-yl)methylether (41), are used for the preparation of thermosetting aliphatic polycarbonates. These crosslinked polymers are degradable and have great potential for the preparation of delivery systems in agrochemical and medical applications [81]. 

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