6-Chloro-5-(2-chloroethyl)oxindole, a key intermediate in the manufacturing of the antipsychotic drug, ziprasidone, has been synthesized by a new route. The salient features of the synthesis are (1) bis-dialkylation of 2,4-difluoro-5-chloronitrobenzene with sodium diethyl malonate, (2) decarboxylative hydrolysis to obtain the oxindole derivative, and (3) reduction and chlorination of acetic ester side
6-Chloro-5-(2-chloroethyl)oxindole是制造
抗精神病药物
齐拉西酮的关键中间体,已通过新途径合成。该合成的显着特点是(1)2,4-二
氟-5-
氯硝基苯与
丙二酸钠的双二烷基化,(2)脱羧
水解得到羟
吲哚衍
生物,(3)
乙酸酯侧的还原和
氯化链。