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Reagents and conditions: (a) PdCl2(dppf)•DCM, Cs2CO3, THF/H2O, 160 °C, 10 min; (b) Ghosez’ reagent (1-chloro-N,N,2-trimethylprop-1-en-1-amine), DCM, rt, 15 h; (c) base (i.e. K2CO3, NaH, etc.), aprotic solvent (i.e. DCM, DMF, MeCN), 0 °C to rt.
