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Reagents and conditions: a) K2CO3, methyl ethyl ketone, 3-bromo-2-methylpropene; b) K2CO3, [Pd(OAc)2], nBu4NCl, DMF, PhB(OH)2; c) NaOH, EtOH, THF, H2O; d) HATU, DiPEA, DMF, CH2Cl2, 2-iodoaniline for 13 or cyclohexylamine for 14 or piperidine for 15.
