2-Ethyl-2-oxazoline oxazolines towards ring-opening by chloride ions during protonation of the imine nitrogen. The direct reaction of propanoyl chloride with 2-chloroethylamine hydrochloride in the presence of triethylamine avoids the formation of water. Propanal reacts with 2-aminoethanol in "t"-butanol to 2-ethyl-2-oxazoline in the presence of the iodinating reagent 1,3-diiodo-5,5-dimethylhydantoin (DIH) and potassium carbonate. 2-Ethyl-2-oxazoline is a readily water-soluble, colorless liquid which is also soluble in a variety of organic solvents and possesses an amine-like smell. Aqueous solutions react alkaline. The compound is stable in alkaline but hydrolyses under acid action. In anhydrous form, 2-ethyl-2-oxazoline is mostly used as a monomer. The cationic
Ethyl sulfate 170 °C in a considerable excess of sulfuric acid, the ethyl sulfate breaks down into ethylene and sulfuric acid. The mechanism of the formation of ethyl sulfate, diethyl ether, and ethylene is based on the reaction between ethanol and sulfuric acid, which involves protonation of the ethanolic oxygen to form the oxonium ion. Ethyl sulfate acculates in hair after chronic alcohol consumption and its detection can be used as a biomarker for alcohol consumption. Ethyl sulfate can exist in salt forms, such as sodium ethyl sulfate, potassium ethyl sulfate, and calcium ethyl sulfate. The salt can be formed by adding