Regioselective reduction of benzylidene acetals from a bis-heterocyclic pyrimidino-pyranoside platform

<p>After the preparation with few steps of the original bicyclic osidic scaffold of pyrimidino-pyranoside type, the exploration of the reactivity of the pyranose part allowed us to carry out different procedures for opening 4,6-<em>O</em>-benzylidene.</p>