Scheme 1.
a(i) NaH, DMF, (EtO2C)2, 0 to 80 °C, 67% (ii) NH2OH·HCl, MeOH, 80 °C, 71% (iii) LiAlH4, THF, 75% (iv) NEt3, MsCl, CH2Cl2 (v) NaH, DMF, 79% (vi) pyridine, −15 to 125 °C, 20%
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