The present invention relates to processes for the preparation of N-protected 4-((2S,5R)-5-((benzyloxy)amino)piperidine-2-carboxamido)piperidine-1-carboxylates. Such compounds have application in the preparation of beta-lactamase inhibitors such as 7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxamides and esters, in particular, the beta lactamase inhibitor, (2S,5R)-7-oxo-N-piperidin-4-yl-6-(sulfoxy)-1,6-diazabicyclo[3.2.1]octane-2-carboxamide. The present invention also encompasses intermediates useful in the disclosed processes and methods for their preparation.
本发明涉及制备N-保护的4-((2S,5R)-5-((苄氧)
氨基)
哌啶-2-羧酰胺基)
哌啶-1-羧酸酯的方法。这些化合物在制备β-内酰胺酶抑制剂,如7-氧-1,6-二氮杂
双环[3.2.1]辛烷-2-羧酰胺和
酯类,特别是β-内酰胺酶抑制剂(2S,5R)-7-氧-N-
哌啶-4-基-6-(磺氧基)-1,6-二氮杂
双环[3.2.1]辛烷-2-羧酰胺中有应用。本发明还包括在所述方法中有用的中间体及其制备方法。