Download 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. ... The efficient synthesis of 3-diazo-piperidin-2-one, from l-ornithine, in two steps is reported. The chemistry of this new cyclic α-diazoamide was explored and allows the rapid access to a wide range of 3-substituted piperidin-2-one derivatives. ... We now wish to report the synthesis of the ...