https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Facile amidinations of 2-aminophenylboronic acid promoted by boronate ester formation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48151 Wed 08 Mar 2023 14:43:43 AEDT ]]> Crystallization-induced amide bond formation creates a boron-centered spirocyclic system https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30695 15H10BN2O6) is formed under crystallization conditions from the 5-nitrosalicylate ester of 2-aminophenylboronic acid. The boron at the center of this structure exists as a tetrahedral complex produced by a dative bond with the amide carbonyl. The perpendicular shape produces an unusual packing structure including a bifurcated hydrogen bond between the amide hydrogen and carbonyl groups on two neighboring molecules. We propose that this reaction occurs due to increased Lewis acidity of the nitrosalicylate ester of 2-aminophenylboronic acid.]]> Sat 24 Mar 2018 07:35:07 AEDT ]]>