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Protection of the commercially available hydro ester 22 with tertiary-butyldimethylsilyl chloride TBDMS-Cl gave silyl ester 23. The ester 23 on reduction with Li BH4 gave the alcohol. The reaction of carboxylic acid 1eq and 2-chloro-4,6-dimethoxy-1,3,5-triazine 1.2 eq in the presence of N-methyl morpholine 3 eq., THF at room temperature for 1-3 h gave the 4,6-dimethoxy-1,3,5-triazine intermediate 20, compound 20 upon treatment with substituted hydroxylamine 1 eq at room temperature for 8 h gave the target product 21. There are many more general synthetic routes that have been reported and cannot be described for lack of space but are mentioned in this review.

13 Hydroxamic acids are capable of inhibiting a variety of enzymes, including ureases, 14, 15 peroxidises 16, and matrix metalloproteinases. 17, 18 These class of compounds are used in the design of therapeutics targeting cancer 19, 20 e.g. histone deacetylases HDACs inhibitors like vorinostat, belinostat, panobinostat and trichostatin A, 21 cardiovascular diseases 22 e.g. hydroxyurea, 24 Alzheimer s, 25 malaria 26, 27 e.g. Ugwu, Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria. Abstract Hydroxamates are physiologically active compounds. They have found applications as histone deacetylase inhibitors widely applied in cancer treatment such as vorinostat, belinostat, panobinostat and trichostatin A. They are amides where the hydrogen H atom of NH center has been replaced by an OH. Hydroxamates are deprotonated product of hydroxamic acid and acts as excellent ligand. Ugwuja3 1Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria 2National Centre for Energy Research and Development, University of Nigeria, Nsukka, Nigeria 3Department of Chemical Sciences, Federal University, Wukari, Nigeria Correspondence to: David I. Introduction Hydroxamates are class of organic compounds bearing the functional group RICON OH RII as organic residues and CO as a carbonyl group. desferrioxamine B, fosmidomycin, siderophores 28 and allergic diseases.