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Synthesis of 2-hydroxy acid 9. (a) (i) LDA, dry THF (ii) HMPA, (iii) CH3I; (b) (i) CH3CH2OCOCl, Et3N, dry THF, (ii) NaBH4, MeOH; (c) iodobenzene diacetate, TEMPO (10 mol%), dry CH2Cl2; (d) aq. sol. NaHSO3, CH2Cl2, (ii) KCN, H2O; (e) 6N HCl/MeOH; (f) 1N NaOH, MeOH.
