Di-n-butyl carbonate

Isoamyl acetate n-Amyl cyanide Benzene Benzyl ether 2 Bromoethyl acetate Chloroform Cinnamaldehyde Di-n amylarnine Di-n-butyl carbonate Diethvlacetic acid Diethylcnetnamme Diethyl formamide Diisobutyl ketone Diisopropvlamine Di-n-propvlamlme Ethyl alcohol Ethyl benzoate Ethyl ether Ethyl phenyUcetate Heptadecanol ... 

Fatty acids (in milk fat) to a total of up to 10 mg were treated with 250 1 of di-n-butyl carbonate and 0.5 ml of 0.2 M sodium butoxide. The tube was capped and the mixture was heated for 2 minutes on a steam bath. The contents of the tube were transferred to a Babcock milk fat test bottle and rinsed in with 0.5 ml of water, 0.5 ml of acetone and a further 0.5 ml of water. Saturated NaCl (10 ml) was added and the volume was adjusted to the mark with water. The layers were separated by centrifugation and the upper layer was taken directly for analysis by gas chromatography [142]. 

Dialkyl carbonates can also be prepared in a threecoupling system of aliphatic alcohol/ C02/alkyl halide under a pressure of CO2 (160 psig) and in the presence of a peralkylated guanidine. In this way, di-n-butyl carbonate 984 is obtained in 73% yield (by GC) [710]. 

Typical procedure. Di-n-butyl carbonate 984 [710] A 160 mL Parr autoclave was charged with butanol 982 (2.22 g, 0.03 mol), N-cyclohexyl-N, N, N",N"-tetrame-thylguanidine (CyTMG 6.9 g, 0.035 mol), and acetonitrile (30 mL). The autoclave was attached to a pressure head, and 160 psig CO2 was introduced with stirring at room temperature. An exothermic reaction ensued, leading to an increase in temperature to ca. 40 °C. In a Fischer-Porter bottle was placed a solution of 1-chloro-butane 983 (8.33 g, 0.09 mol) in acetonitrile (10 mL). This bottle was attached to... 

The lifetime of di-n-butoxymethane in the lower atmosphere, as determined by its reaction with OH, will be about 3 h for daytime [OH] 2.5 x 10 molecule cm". The products of the OH-initiated oxidation have been studied in the presence of NO , by Maurer et al. (2000). The major products observed are n-butoxy methyl formate [HC(0)0CH20C4H9] and propanal, both of which are produced from OH-attack at the 4-position on the parent species, following decomposition of the resultant CH3CH2CH2CH(0 )0C4H9 radical. On the basis of the observed yields of n-butoxy methyl formate, these species likely account for about 80% of the product distribution. Di-n-butyl carbonate [n-C4H90C(=0)0C4H9, the product of OH attack at the central CH2 group] was found in small yield (< 10%). 

Successful results have been obtained (Renfrew and Chaney, 1946) with ethyl formate methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec.-butyl and iso-amyl acetat ethyleneglycol diacetate ethyl monochloro- and trichloro-acetates methyl, n-propyl, n-octyl and n-dodecyl propionates ethyl butyrate n-butyl and n-amyl valerates ethyl laurate ethyl lactate ethyl acetoacetate diethyl carbonate dimethyl and diethyl oxalates diethyl malonate diethyl adipate di-n-butyl tartrate ethyl phenylacetate methyl and ethyl benzoates methyl and ethyl salicylates diethyl and di-n-butyl phthalates. The method fails for vinyl acetate, ieri.-butyl acetate, n-octadecyl propionate, ethyl and >i-butyl stearate, phenyl, benzyl- and guaicol-acetate, methyl and ethyl cinnamate, diethyl sulphate and ethyl p-aminobenzoate. 

Sodium (9.6 parts) was dissolved in butanol (192 parts) and di-n-butyl ethyl 1 -methyl-n-butylmalonate (62,B parts) and urea (14.4 parts) were added to the warm solution with agitation. The mixture was then heated to reflux temperature in three quarters of an hour and maintained for 2 hours. The reaction mass was kept, water (150 parts) added, the aqueous portion separated, and the butanol layer extracted with water (3 x 50 parts). The combined aqueous extracts were then given 3 small extractions with benzene, the aqueous liquors separated, charcoaled,filtered and precipitated with concentrated hydrochloric acid (acid to congo-paper). The solid was collected, washed with water, dissolved in N-sodium hydroxide and reprecipitated with carbon dioxide. On recrystallization, from aqueous alcohol, the pentobarbitone was obtained. 

Di-N-Butyl Ether 92 1.5 7.6 Dry chemical, "alcohol" foam, or carbon dioxide Water may be ineffective Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back 382 No ... 

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