| http://www.w3.org/ns/prov#value | - Removal of the Boc-protecting groups with acid, preferably HCl in dioxane or trifluoroacetic acid in dichloromethane, and neutralization of the amine salt with a base, preferably sodium bicarbonate , provided an exposed hydroxylamine moiety which was treated with a formylating agent, preferably formicacetyl anhydride, in solvents such as THF or dichloromethane to provide hydroxamic acid 7.
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