| abstract |
(57) [Summary] (Correction) [Solution] Formula I: [Wherein R is C 1 -C 4 -alkyl, and R 1 and R 2 are Are each independently C 1 -C 4 -alkyl or bonded to piperidinyl, pyrrolidinyl, methylpyrrolidino, dimethylpyrrolidino, morpholino, dimethylamino, diethylamino or 1-hexamethyleneimino, and n is 2 Or 3] is prepared by hydroxyalkyl etherification of the phenol group of the corresponding hydroxybenzoic acid ester and amino substitution of the alcohol group formed. [Effect] It is an efficient and less dangerous method for producing a novel intermediate for benzothiophene drug synthesis. |