Reagents: Step 1: 2-(ethoxymethylene)-malonate, ethanol, reflux. Step 2: phenyl ether, reflux. Step 3: POCl3, reflux. Step 4: boronic acid/boronic ester, K2CO3, Pd(PPh3)4, toluene. Step 5: R1NH2, AcOH. Step 6: LiOH, EtOH–water. Step 7: DPPA, Et3N, DMF. Step 8: MeI, NaOH, CH2Cl2.