Characterization of an Indole-3-Acetamide Hydrolase from Alcaligenes faecalis subsp. parafaecalis and Its Application in Efficient Preparation of Both Enantiomers of Chiral Building Block 2,3-Dihydro-1,4-Benzodioxin-2-Carboxylic Acid
作者:Pradeep Mishra、Suneet Kaur、Amar Nath Sharma、Ravinder S. Jolly
DOI:10.1371/journal.pone.0159009
日期:——
drawback or other, such as low efficiency, uncommon and not so easily accessible chiral resolving agent and less than optimal enantiomeric purity. Our interest in finding a biocatalyst for efficient production of enantiomerically pure 2,3-dihydro-1,4-benzodioxin-2-carboxylic acid lead us to discover an amidase activity from Alcaligenes faecalis subsp. parafaecalis, which was able to kinetically resolve 2,3-dihydro-1
2,3-二氢-1,4-苯并二恶英-2-羧酸的两种对映体都是有价值的手性合成子,可用于对映体特异性合成治疗剂,如(S)-甲磺酸多沙唑嗪,WB 4101,MKC 242、2,3-二氢-2-羟甲基-1,4-苯并二恶英和N- [2,4-氧代-1,3-噻唑烷-3-基] -2,3-二氢-1,4-苯并二恶英-2-羧酰胺。药物应用需要光学纯形式的这些对映异构体。然而,当前可用的方法具有一个或多个缺点,例如效率低,不常见且不那么容易获得的手性拆分剂和低于最佳对映体纯度。我们对寻找有效生产对映体纯的2,3-二氢-1,4-苯并二恶英-2-羧酸的生物催化剂的兴趣使我们发现了粪便产碱杆菌亚种的酰胺酶活性。粪便 能够动力学拆分E值大于200的2,3-二氢-1,4-苯并二恶英-2-羧酰胺。因此,在约50%的转化率下,> 99%ee产生了(R)-2,3-二氢-1,4-苯并二恶英-2-羧酸。剩余的酰胺具有(S)-构型和99