“…In the standard protocol for the synthesis of 2-aminotropones B , the tosyl-oxy-tropone 1 can simply be stirred in an excess of amine, if the amine is sufficiently nucleophilic, liquid at room temperature, and affordable in the required quantities (Scheme , route 1). Alternatively, stoichiometric amounts of an amine are used in the presence of a base, if the amine is valuable and/or solid at room temperature (route 2). ,,, Many primary alkylamines fulfill the requirements for the more facile route 1, isopropylamine being one of the archetypical examples. Consequently, the reaction of 1 to give 2 is one of the most common reactions in the preparation of aminotropones and aminotroponimines (Scheme a, left) .…”