Ethyl acetate ethanol to acetaldehyde, which leaves the wine with a sharp vinegar-like taste. In the field of entomology, ethyl acetate is an effective asphyxiant for use in insect collecting and study. In a killing jar charged with ethyl acetate, the vapors will kill the collected insect quickly without destroying it. Because it is not hygroscopic, ethyl acetate also keeps the insect soft enough to allow proper mounting suitable for a collection. Ethyl acetate can be hydrolyzed in acidic or basic conditions to regain acetic acid and ethanol. The use of an acid catalyst accelerates the hydrolysis, which is subject to the
2-Ethyl-2-oxazoline ring-opening polymerization of 2-ethyl-2-oxazoline can be initiated by alkylation with e.g. methyl tosylate or triflates (in particular methyl triflate) and leads to the water-soluble poly(2-ethyl-2-oxazoline) which is a propionyl-substituted linear polyethylenimine and can also be seen as a pseudo-polypeptide. The polymerization of 2-ethyl-2-oxazoline can also be carried out as living cationic polymerization. Copolymers with other 2-alkyl-2-oxazolines and other monomers allow the preparation of random copolymers and block copolymers. The copolymers obtained can be used as biocompatible drug carriers, in coatings and adhesives, and in many other applications. The elimination of the propionyl group from poly (2-ethyl-2-oxazoline) yields linear polyethyleneimine. 2-Ethyl-2-oxazoline