Preparation of ABNO on Scale and Analysis by Quantitative Paramagnetic NMR

A practical, safe, and scalable synthesis of the stable nitro-oxide radical catalyst ABNO was developed. This process is chromatography-free and avoids the Wolff–Kishner reduction. 1H NMR data for this paramagnetic compound were obtained that allowed an assessment of its chemical purity. Impact sensitivity test data for solid ABNO are also reported.