合成路线1

The reduction of the ester function of (I) with LiAlH4 in THF gives (II). O-demethylation of (II) with EtSNa in DMF yields alcohol (III), which is then cyclized by Mitsunobu reaction with DEAD·Ph3P in THF to yield (IV). Displacement of the Br of (IV) by means of Zn(CN)2 and Pd(PPh3)4 in DMF affords cyano derivative (V), which is then converted into (VI) after debenzylation by treatment with HCl/EtOH and H2 over Pd/C. Finally (VI) is coupled with aldehyde (VII) by reductive amination in 1,2-dichloroethane in presence of NaBH(OAc)3.Alternatively the final product can be obtained by reaction of (VI) with chloro derivative (X) in CH3CN in presence of K2CO3 and KI. (X) can be obtained by acylation of acetanilide (VIII) with chloride (A) in 1,2-dichloroethane in presence of AlCl3 followed by treatment with TFA and Et3SiH.