Dibutyl-ethyl

H 1. ohne Amin H3C —COOH/ Dibutyl-ethyl-amin 80 7... 

Figure 3. Calculation of solubility parameters for N-methyl pyr-rolidone (NMP) and N,N-dibutyl ethyl hexamide (DBEH) at 30°C. (Probes as in Figure 1.)...

The use of vinylboronates as dienophiles was first reported for dibutyl ethyl-eneboronate and cyclopentadiene. At 90-100 °C, a mixture of dibutyl endo-and exo-5-... 

Phenyllithium can be used as a solution in ethyl ether, but because of its limited stabUity (t 2 = 12 d at 35° C) it is commercially available in solution in mixtures, usuaUy 70 30 wt % cyclohexane ethyl ether (117). In this particular mixture of solvents, a 20 wt % solution, free of chlorobenzene, is stable for at least four months under an inert atmosphere (argon or nitrogen) in sealed containers at room temperature. Phenyllithium is also available in dibutyl ether solution (117). It is classified as a flammable Hquid. 

Comparison of Table 5.4 and 5.7 allows the prediction that aromatic oils will be plasticisers for natural rubber, that dibutyl phthalate will plasticise poly(methyl methacrylate), that tritolyl phosphate will plasticise nitrile rubbers, that dibenzyl ether will plasticise poly(vinylidene chloride) and that dimethyl phthalate will plasticise cellulose diacetate. These predictions are found to be correct. What is not predictable is that camphor should be an effective plasticiser for cellulose nitrate. It would seem that this crystalline material, which has to be dispersed into the polymer with the aid of liquids such as ethyl alcohol, is only compatible with the polymer because of some specific interaction between the carbonyl group present in the camphor with some group in the cellulose nitrate. 

Total volatile (ethyl alcohol + dibutyl ether) - — — 3.8... 

Removal of the solvent under reduced pressure affords 1.9-2.1 g. of the crude yellow adduct (Note 4). This crude material is dissolved in 8 ml. of hot dibutyl ether (70-80°) and rapidly percolated through approximately 2.0 g. of Plorisil (Note 5). Cooling and then filtering the eluent affords 1.2-1.3 g. (40-44%) of yellow crystals, m.p. 77-80°. An additional recrystallization from dibutyl ether or ethyl acetate-hexane affords pale yellow crystals, m.p. 78.5-80° (Note 6). 

Dibutyl phosphite reacting with 2-butenoic acid ethyl ester yields the corresponding phosphonic acid ester see Eq. (65). 

Dimethyl Dipropyl Dibutyl Methyl Ethyl Methyl Vinyl Methyl Amyl... 

Diazo aminobenzene Di-t-butyl-p-cresol Dibutyl tin maleate Dibutyl tin oxide Dichlorophene 2,4-Dichiorophenoxy ethyl benzoate... 

Dimethyl ether Ethyl methyl ether Diehyl ether Dipropyl ether Diisopropyl ether Dibutyl ether 1,2-Dimethoxy ethane... 

Ethyl a-bromoisobutyrate, 21, 53 Ethyl /3-bromopropionate, 20, 6S Ethyl caprylate, 20, 69 Ethyl carbonate, 23, 95, 97 Ethyl chlorocarbonate, 21, 81 2-Ethylchromone, 21, 42 Ethyl diacetylacetate, 21, 46 copper derivative, 21, 46 Ethyl a,a-DIMETHYL-/3-PHENYL-/3-hydroxypropionate, 21, S3 Ethylene chloride, 20, 28 22, 76 ETHYLENEDIAMINE, IV IV-DIBUTYL-, 23, 23... 

OCTADECYNE OLEIC ACID DIBUTYL SEBACATE DI HEXYL ADIPATE 1-CYCOPENTYLTRIDECANE 1-CYCLOHEXYLDOOECANE 1-OCTADECENE STEARIC ACID n-OCTADECANE DINONYL ETHER 1-OCTADECANOL BUTYL-TETRADECYL-SULFIDE ETHYL-HEXADECYL-SULFIDE HEPTADECYL-HETHYL-SULFIDE NONYL-SULFIDE PENTADECYL-PROPYL-SULFIDE 1-OCTADECANETHIOL NONYL-DISULFIDE 1-n-NONYLNAPHTHALENE n-TRIDECYLBENZENE... 

Tanaka. R. and Toyama, S. Excess molar volumes and excess molar heat capacities for binary mixtures of ethanol with chlorocyclohexane, 1-nitropropane, dibutyl ether, and ethyl acetate at the temperature of 298.15 K. 7 Chem. Eng. Data, 41(6) 1455-1458,1996. 

Te-Li exchange in bis(2-arylethenyl)tellurides (run 15). To a solution of bis-[2-(p-tolyl) ethenyl] telluride (0.361 g, 1 mmol) in THE (4 mL) at -78°C under nitrogen, a solution of n-BuLi (0.91 mL, 2.1 mmol, 2.42 M solution in hexane) was added dropwise. After 20 min of stirring at this temperature, DMF (0.2 mL, 2.58 mmol) was added. The temperature was raised to room temperature and stirred for 1 h, then diluted with ethyl acetate (30 mL) and washed with water (3x10 mL). The organic layer was separated, dried with MgS04 and the solvent removed under vacuum. Elution with hexane removed dibutyl telluride, and elution with ethyl acetate gave a low-m.p. solid. Yield 0.175 g, 60% (characterized as the semi-carbazone m.p. 108.4-109.4°C). 

Butanol, which at one time was an unwanted by-product in the preparation of acetone, is now the most important product of the fermentation. The building of a large new factory in Puerto Rico using 10,000 tons of molasses per annum for its production is an indication of this importance. Butanol is probably still the best solvent for cellulose nitrate lacquers. Dibutyl phthalate is certainly the most widely used plasticizer for synthetic resins, and butyl oleate, tributyl citrate and dibutyl tartrate have also been described as plasticizers. Another important use of butanol is as a source of butadiene, which serves as an intermediate in the conversion of sucrose into a synthetic rubber. Although in recent years other methods have been described for the preparation of butanol (for example, from ethyl alcohol and from acetylene), yet the fermentation of carbohydrates is still the cheapest process. 

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