Carbodiimides hydrolyze to form ureas, which makes them uncommon in nature. Hydroxyurea are also used for treatment of chronic myelogenal leukemia, myeloproliferative syndromes and sickle cell anemia. 2 Hydroxamates of amino acids are effective inhibitors of amino peptidases. From the perspective of small molecule activation, carbodiimides are. Hydroxamates such as fosmidomycin and desferrioxamine B are potent antimalarial agent. Ugwuja, Synthesis and Biological Applications of Hydroxamates, American Journal of Organic Chemistry, Vol. 3 Their mode of action results from the formation of bidentate ligand with active site of zinc. Synthesis of Benzohydroxamic Acid 3 The synthesis of compound 3 was achieved by reacting methyl benzoate 1 and hydroxylamine 2. Synthesis of Hydroxamates Using N, N1, NII–trimethoxy-N, NI, NII-trimethyl Phosphorus Triamides 5 Nui et al 31 reported the conversion of aromatic and aliphatic carboxylic acids, including sterically hindered substrates directly to hydroxamates using N, NI, NII-trimethoxy-N, NI, NII–trimethyl phosphorus triamide 5. On condensation of aromatic or aliphatic carboxylic acid 4 0.01M and compound 5 0.005M in toluene at 60 for 0.5 to 1 h, the hydroxamate 6 was obtained in excellent yield. Ester Synthesis of Hydroxamate Riva et al 32 reported the transformation of methyl or ethyl carboxylic esters into the corresponding hydroxamic acid.
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