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Reagents and conditions: (i) SOCl2, EtOH, reflux; (ii) CH3COCl, Et3N, THF, rt; (iii) NaH, trimethylsulfoxonium iodide, DMSO, 50 °C; (iv) 1 M NaOH, EtOH, rt; (v) BnCl, K2CO3, DMF, 80 °C; (vi) H2, Pd/C, rt; (vii) Pd(OAc)2, Et3SiH, Et3N, DCM, rt.
