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Synthesis of methyl 3-O-phospo-α-D-glucopyranuronic acid (7). Reagents: (a) ZnCl, rt (b) BnBr, NaH, THF, 0C (c) iPr2NP-(OFm)2, 1H-tetrazole, H2O2,THF, (d) piperidine, CH2Cl2, (e) work-up with buffer, pH 6.0, (f) Et3SiH, 10% Pd/C, MeOH (g) NaOCl, NaOClO, piperidoxyl, acetonitrile, rt, pH 6.9.
