Practical synthesis of (R)-(+)-6-(1,4-dimethoxy-3-methyl-2-naphthyl)-6-(4-hydroxyphenyl)hexanoic acid: a key intermediate for a therapeutic drug for neurodegenerative diseases
作者:Tatsuya Ito、Tomomi Ikemoto、Toru Yamano、Yukio Mizuno、Kiminori Tomimatsu
DOI:10.1016/s0957-4166(03)00580-9
日期:2003.11
obtained from the corresponding racemic ester by lipase-catalyzed resolution, followed by sulfation or phosphorylation. Sulfation by a sulfur trioxide pyridine complex or phosphorylation by phosphoryl chloride enabled facile isolation of the optically active ester simply by extraction. Optically active acid (R)-2 was synthesized in excellent enantiomeric excess by hydrolysis of (R)-9b followed by recrystallization
为(制备一种实用方法- [R(+) - - 6-(1,4-二甲氧基-3-甲基-2-萘基)-6-(4-羟基苯基)己酸()- [R )- 2,一键已经开发出用于神经退行性疾病的治疗药物的中间体。rac-甲基6-((1,4-二甲氧基-3-甲基-2-萘基)-6-(4-(丙酰氧基)苯基)己酸己酸酯rac - 9b是由2-甲基萘醌分七个步骤合成的。旋光酯(R)-9b通过脂肪酶催化的拆分,容易地从相应的外消旋酯获得,然后进行硫酸化或磷酸化。通过三氧化硫吡啶配合物的硫酸化或磷酰氯的磷酸化使得可以简单地通过萃取容易地分离旋光酯。通过水解(R)-9b,然后重结晶,以优异的对映体过量合成旋光酸(R)-2。(R)-2的本合成以10个步骤完成,无需色谱纯化。