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Synthesis of compounds 61–65.
Reagents and conditions: (a) i) 3-bromopropanol (for 61, 63) or 3-bromopropanic acid (for 62, 64), MeCN, NaN3, reflux; ii) DMF, H2O, 5 mol% CuSO4/5H2O, 10 mol% L-ascorbic acid sodium, 75 °C. (b) NaOH, EtOH, rt.
