Scheme 2. Follow-up chemistry starting with adduct 3. Reagents and conditions: a. SOCl2, EtOH, rt (from 3a); b. BnBr, K2CO3, DMF, rt (from 3l); c. 33 wt% HBr in AcOH, rt to 60 °C (from 3a); d. 35% HCl, 100 °C (from 4); e. H2, Pd/C, rt (from 3a).
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