Production of (R)-2-Bromo-5-phthalimidopentanoic Acid via a Diazotisation Process from (R)-Ornithine
摘要:
A scaleable "one-pot'' preparation of (R)-2-bromo-5-phthal-imidopentanoic acid from (R) ornithine is described. The use of this chirality pool method allowed for rapid development of the process. Acetic acid was found to be an efficient antifoaming agent during the diazotisation reaction. The use of an extractive workup procedure has the benefit of reducing operator exposure to the corrosive reaction mixture and minimised manual handling operations.