Scheme 1.
a: PhOH, DMF, K2CO3, 75 °C; b: BrCH2COOCH3, K2CO3, CH3CN, 55 °C; c: AlCl3, CH2Cl2, 45 °C; d: LiOH, H2O, THF, r.t., then 0.1 N HCl.
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