Process research and development of the fully synthetic broad spectrum tetracycline TP-2758 (I), with a chiral pyrrolidine side chain at the C-8 position, is described.The process utilizes two key intermediates, enone II and pyrrolylbenzoate III, in a convergent approach that allows for manufacturing of sufficient quantities of API to supply preclin. and early clin. development.The pyrrolidine moiety was introduced into the left-hand piece (LHP) III with high enantioselectivity using Ellman's sulfinamide chem., and the absolute configuration was confirmed by X-ray crystal structure anal.