Oligomerization in the reaction of acetylacetone with organic diisocyanates

Abstract

Diisocyanates are organic monomers [1] widely used in the polymer chemistry [2–4]. They are highly reactive compounds toward various nucleophiles such as alcohols, phenols, and primary amines [5]. The corresponding reactions underlie large-scale processes for manufacture of polyurethanes and polyureas. CH Acids are less reactive toward isocyanates. However, such CH acids as malonic acid esters, ethyl acetoacetate, nitroalkanes, and acetylacetone are known [2, 3] to react with diisocyanates at the activated C–H bonds to give substituted amides.