Scheme 7.
Synthesis of compound 34. Reagents and conditions: a) (4‐((dimethylamino)methyl)phenyl)boronic acid, Pd(PPh3)4, Na2CO3, toluene/H2O, 14 h, 81.5–85.8 %; b) NaH, THF, RT, 6 h, 34.4–91.3 %.
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