Synthesis and biological evaluation of enantiomerically pure glyceric acid derivatives as LpxC inhibitors
作者:Giovanni Tangherlini、Tullio Torregrossa、Oriana Agoglitta、Jens Köhler、Jelena Melesina、Wolfgang Sippl、Ralph Holl
DOI:10.1016/j.bmc.2016.01.029
日期:2016.3
the inhibitory activity against LpxC, glyceric acid ethers (R)-7a, (S)-7a, (R)-7b, and (S)-7b, lacking the hydroxymethyl group in benzylic position, were synthesized. The compounds were obtained in enantiomerically pure form by a chiral pool synthesis and a lipase-catalyzed enantioselective desymmetrization, respectively. The enantiomeric hydroxamic acids (R)-7b (Ki = 230 nM) and (S)-7b (Ki = 390 nM)
UDP-3-O-[(R)-3-羟基肉豆蔻酰基] -N-乙酰氨基葡糖脱乙酰酶(LpxC)的抑制剂代表了一种有前途的新型抗生素,可以选择性地对抗革兰氏阴性菌。为了阐明二醇的羟甲基(冲击小号,小号) - 4关于对LpxC,甘油酸醚(抑制活性- [R )-图7a,(小号) -图7a,(- [R )-图7b,和(小号)-7b合成了在苄基位置上没有羟甲基的化合物。通过手性库合成和脂肪酶催化的对映选择性去对称化分别以对映体纯的形式获得化合物。对映异构体异羟肟酸(R)-7b(K i = 230 nM)和(S)-7b(K i = 390 nM)显示出有希望的酶抑制作用。但是,它们的抑制活性彼此之间基本上没有区别,从而导致低的eudymic比率。通常,合成的甘油酸衍生物7对两种大肠杆菌显示出抗菌活性。超过各自区域异构体的菌株6。