A seven-step synthesis of orthogonally O-protected 2-deoxy-streptamine has been developed from readily available neomycin, with an overall yield of 28%. Key chemical transformations include a chemoselective glycosidic bond hydrolysis and two regioselective protective group manipulations involving acetylation and deacetylation. The synthetic route is amenable to scale-up for the production of multigram quantities of enantiopure and orthogonally O-protected 2-deoxystreptamine, a versatile scaffold for the generation of libraries of RNA-targeting ligands.

The piperidine ring system is one of the most common structural subunits and is found in many natural products. Moreover, piperidine alkaloids and derivatives thereof are of great interest for the pharmaceutical industry since they exhibit a wide range of biological activities. Consequently, short and valuable routes to highly functionalized building blocks for this important ring system are of general interest. A ring‐closing metathesis (RCM)‐mediated approach based on linear (substituted) dehydroamino esters was developed to provide cyclic dehydroamino esters. These structures represent valuable intermediates en route to highly substituted pipecolic acids as well as more elaborate heterocycles.