Preparation of (R)- and (S)-6-hydroxybuspirone by enzymatic resolution or hydroxylation
作者:Ronald L. Hanson、William L. Parker、David B. Brzozowski、Thomas P. Tully、Mark Liu、Atul Kotnis、Ramesh N. Patel
DOI:10.1016/j.tetasy.2005.07.020
日期:2005.8
buspirone. The (R)- and (S)-enantiomers of 6-hydroxybuspirone were prepared using an enzymatic resolution process. l-Amino acid acylase from Aspergillus melleus (Amano Acylase 30000) was used to hydrolyze racemic 6-acetoxybuspirone to (S)-6-hydroxybuspirone in 95% ee after 45% conversion. The remaining (R)-6-acetoxybuspirone with 88% ee was converted to (R)-6-hydroxybuspirone by acid hydrolysis. The
6-羟基丁螺环酮是抗焦虑药丁螺环酮的活性代谢产物。使用酶拆分方法制备6-羟基丁螺环酮的(R)-和(S)-对映体。来自米曲霉的1-氨基酸酰基转移酶(Amano酰基转移酶30000)在45%转化后用于将外消旋的6-乙酰氧基丁螺环酮在95%ee中水解为(S)-6-羟基丁螺环酮。通过酸水解将剩余的具有88%ee的(R)-6-乙酰氧基丁螺环酮转化为(R)-6-羟基丁螺环酮。通过结晶为亚稳态多晶型物,两种对映体的ee可以提高到99%。(S还通过使用抗生素链霉菌ATCC 14890对丁螺环酮进行羟基化,以88%ee和14.5%收率获得了-6-羟基丁螺环酮。