Dibutyl acetylene

Chlorine Ammonia, acetylene, alcohols, alkanes, benzene, butadiene, carbon disulflde, dibutyl phthalate, ethers, fluorine, glycerol, hydrocarbons, hydrogen, sodium carbide, flnely divided metals, metal acetylides and carbides, nitrogen compounds, nonmetals, nonmetal hydrides, phosphorus compounds, polychlorobi-phenyl, silicones, steel, sulfldes, synthetic rubber, turpentine... 

N. /V -Bis(dicthylboryl)mcthylaminc. 3223 Bis(dipropylborino)acetylene, 3670 Dibutyl-3-methyl-3-buten-l-ynlborane, 3618... 

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. 

Cuprate, dibutyl-, lithium, reaction with acetylene, 66, 62 Cuprates, higher order, 66, 57... 

V, /V- B i s(diethylboryl)meth y I am i ne, 3217 Bis(dipropylborino)acetylene, 3663 Dibutyl-3-methyl-3-buten-1 -ynlborane, 3612... 

Reduction of the amount of the ethyl ether (initially 400 mL) increases the formation of the 2 1 acetylene-titanium alkoxide complex, i.e., a titanacyclopentadiene. However, under these conditions, hydrolysis of the reaction mixture reveals that the formation of 2,3-dibutyl-l,4-bis(trimethylsilyl)-1,3-butadiene arising from the titanacyclopentadiene is less than 3%. In any event, after distillation, this diene does not contaminate the desired product. 

CHgCiC.Cl. It was obtd in small quantity, mixed with ethyl bromide, by interaction of p-toluenesulfonyl chloride with methyl acetylene -magnesium bromide in dibutyl ether. It was not purified. The pure compd, bp 32 8-33° nDl 4l31 at 20°,. was prepd by dehydrohalogenation of cis -1,2-dichloro-l-propene or by chlorination of 1 -propyne (Ref 3)... 

The great majority of Grignard reactions are carried out in diethyl ether, but in some special cases recourse is had to dibutyl or diisopentyl ether. Methylene dichloride can also be used as solvent for Grignard reactions 178 acetylenic Grignard reagents are more soluble in methylene dichloride than in ether. 

Acetylene Tetrabromide Dibutyl Sebacate Lactic Acid (B6%) 4-Phenyl-M-DioKane... 

Acetylene-l-phosphines. A soln. of dibutylphosphinoethyne in an equal volume of ether added dropwise to a suspension of LiNHa prepared from Li and liq. NH3 in the presence of ferric nitrate, after 30 min. stirring ethereal ethyl iodide added dropwise, and stirring continued for 4 hrs. l-(dibutyl-phosphino)-l-butyne. Y 84%. F. e. s. W. Voskuil and J. F. Arens, R. 81, 993 (1962) also labeled compounds s. R. N. Renaud and L. G. Leitch, Gan. J. Ghem. A2, 2089 (1964). 

---