(S)-N-(4-(2,5-Dioxooxazolidin-4-yl)butyl)-2,2,2-trifluoroacetamide (CAS 42267-27-6) is a chiral fluorinated pharmaceutical intermediate with a hydantoin (oxazolidine-2,5-dione) core and a trifluoroacetamide protecting group. It features a butyl linker, molecular formula C₉H₁₁F₃N₂O₄, MW 268.19. Used in peptide synthesis, peptidomimetic design, and drug discovery for amine protection and metabolic stability enhancement. Typically a solid, stored at ≤4°C or -20°C under inert gas.
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