N-Butyl oxalate

Di-n-butyl oxalate Ethanedioic acid, dibutyl ester... 

Dl-n-butyl oxalate. See Dibutyl oxalate Dl-s-butyl oxalate. See Diisobutyl oxalate 2,2-Dlbutyl-1-oxa-2-stanna-3-thiacyclohexan-6-one. See DIbutyltin p-mercaptopropionate DIbutyloxide. See Dibutyl ether N,N -Dlbutyl-2-[1-oxododecylamino]-pentadiamide. See Dibutyl lauroyl qlutamide Dibutyloxostannane Dibutyloxotin. See DIbutyltin oxide Di-t-butyl peroxide... 

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. 

Diaziridines are weak bases, They can be extracted from organic solvents with aqueous mineral acids. With increasing number and chain length of alkyl substituents the solubility in aqueous mineral acids decreases. l-MethyI-2-n-butyl-3-hexyldiaziridine is soluble only in concentrated hydrochloric acid. Stable oxalates can in some cases be prepared from 1-aIkyI-diaziridines (43). The salts are stable indefinitely and by the action of alkali the diaziridines can be recovered. Diaziridines dialkylated on nitrogen (44) are hardly capable of salt... 

UN 3082, see Benzyl butyl phthalate, Bis(2-ethylhexyl) phthalate, Di-n-butyl phthalate, 2-Methylnaphthalene UN 3143, see 2-Acetylaminofluorene, p-Dimethylaminoazobenzene UN 3155, see Pentachlorophenol UN 3261, see Oxalic acid UN 9037, see Hexachloroethane UN 9094, see Benzoic acid UN 9095, see Di-n-butyl phthalate... 

The N(4) atom of the side-chain piperazino group of 187 (R = Et, R = piperazino) was acylated with di-/cr/-butyl oxalate. 3-Decarboxylated products (187) were prepared from 186 under different reaction conditions in 44-81% yield (see Scheme 4) [95T11125]. The ester group of 187(R = Et) was hydrolyzed in boiling acetic acid in the presence of concentrated hydrochloric acid to give 3-carboxylic acids (187, R = H). 

Figure 1. Total ion current of n-butyl esters of the acidic fraction from non-sterile leaf washings of C. sativa. Key 1 = oxalic acid 2 = malonic acid 3 = maleic acid 4 = succinic acid 5 = fumaric acid 6 = alpha-ketoglutaric acid 7 = cis-aconitic acid 8 = citric acid (19)-...

The first step consists of the formation of lithio salts by treatment of 5,6-dihydrooxazines with phenyl-, n-butyl-, or t-butyllithium in tetra-hydrofuran at -780.1,3,22,223 The lithio salts can readily be alkylated by alkyl halides to 75, and the product can be reduced with aqueous sodium borohydride (or borodeuteride) at pH 7 in tetrahydrofuran-ethanol-water at -35° to -45°C to tetrahydro-l,3-oxazines (76) in quantitative yield. The latter 224-228 23e on hydrolysis with aqueous oxalic acid give aldehydes (77) [Eq. (63)]. 

Kuhlman [5] re-polymerized macrocyclic ester oligomers in the presence of di-n-butyl tin oxalate, which had up to a 2 minute latency period and was followed by a rapid polymerization similar to that of di-n-butyltin glycolate. 

DIMETHYL-4-OXO-2H-PYRAN-6-CARBOXYLIC ACID n-BUTYLMESITYLOXID OXALATE 2-CARBO-n-BUTOXY-6,6-DIMETHYL-5,6-DIHYDRO-l,4-PYRONE 3,4-DIHYDRO-2,2-DIMETHYL-4-OXO-2H-PYRAN-6-CARBOXYLIC ACID-n-BUTYL ESTER DIHDYROPYR-ONE 0,a-DIMETHYUa -CARBOBUTOXY-DIHYDRO-7-PYRONE 2,2-DIMETHYL-6-CARBOBUTOXY-2,3-DIHYDRO-4-PYRONE ENT 9 INDALONE... 

In none of the above examples where tetrahedral intermediates have been shown to be kinetically important is it possible to demonstrate an accumulation of the tetrahedral intermediate by spectrophotometric means. The tetrahedral intermediate has been observed directly only under nonhydrolytic conditions (Bender, 1953). When metal alkoxides are added to haloacetic acid esters or diethyl oxalate in di-n-butyl ether, the resulting heterogeneous system shows a diminution in intensity of the carbonyl stretching band in the infrared. The equilibrium towards the addition intermediate is greatest for the more negatively substituted esters, as would be expected. The parent haloacetic acids do not exhibit... 

Ethyl a-bromopropionate, 1286 Ethyl /3-bromopropionate, 1118 Ethyl bromopyruvate, 1217 Ethyl t-butyl malonate, 522, 523 Ethyl t-butyl oxalate, 210 Ethyl n-butyrate, 790 Ethyl carbamate, see Urethane S-Ethylcarbamoylcysteine, 383 Ethyl carbazate, see Ethoxycarbonylhydra-zine... 

The hydrogenation of n-botyl oxalate into ethylene glycol and n-butyl alcohol, jointly developed by Union Carbide and Ube Industries. Oxalate is obtained by oxidative carbo-nylation of n-butanoi on the liquid phase, by using a palladium based catalyst and an accelerator (nitric acid, n-butyl nitrite, ), at about 70TC and 6.106 Pa absolute <... 

---