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(a) TBDPSCl, imidazole; (b) BnOCOCl, NaHCO3; (c) HOAc/H2O/THF; (d) BzCl, py; (e) Me2CO, Me2C(OMe)2, TsOH; (f) NaOMe, MeOH; (g) (BnO)2PNiPr2, tetrazole, then MCPBA; (h) Bu4NF, THF; (i) TFA/THF/H2O; (j) H2, Pd black; (k) NaBH3CN, 8, Et3N, MeOH.
