Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A new chemoselective procedure for the reductive transformation of organic azides to the corresponding N-(tert-butoxycarbonyl)amino derivatives using triethylsilane and di-tert-butyl dicarbonate in the presence of a catalytic amount of 20% Degussa is described.