A short and highly enantioselective synthesis of both enantiomers of GABA agonist baclofen in four steps with total yields of 32.8% [for (S)-isomer] and 35.1% [for (R)-isomer] is reported. The key step involved desymmetrization of cyclic anhydride with modified cinchona alkaloids.
报道了GABA激动剂巴氯芬的两种对映体的短且高对映选择性的合成,其分四步进行,其总产率为(S)-异构体为32.8%[ R ]-异构体为35.1%。关键步骤涉及用修饰的金鸡纳生物碱使环酐脱对称化。