Convenient enzymatic resolution of (<i>R</i>,<i>S</i>)-2-methylbutyric acid catalyzed by immobilized lipases
作者:Mateus Mittersteiner、Bruna Luiza Linshalm、Ana Paula Furlan Vieira、Patrícia Bulegon Brondani、Dilamara Riva Scharf、Paulo Cesar de Jesus
DOI:10.1002/chir.22779
日期:2018.1
immobilized lipases has been explored in the enantioselective esterification of (R,S)‐2‐methylbutyric acid, an insect pheromone precursor. With the use of Candida antarctica B, using hexane as solvent, (R)‐pentyl 2‐methylbutyrate was prepared in 2 h with c 40%, eep 90%, and E = 35, while Thermomyces lanuginosus leads to c 18%, eep 91%, and E = 26. The (S)‐enantiomer was obtained by the use of Candida rugosa
在昆虫信息素前体(R,S)-2-甲基丁酸的对映选择性酯化中,已经探索了几种固定化脂肪酶的应用。在使用假丝酵母B的情况下,以己烷为溶剂,在2小时内制备了(R)-戊基2-甲基丁酸酯,其c约为40%,ee p约为90%,E = 35,而羊毛嗜热霉菌导致c约为18%,ee p 91%,E =26。(S)-对映异构体是通过使用假丝酵母或米根霉获得的(2-h反应,c分别为34%和35%,eep 75和49%, E 分别为10和4)。在最佳条件下,评估了溶剂,摩尔比和亲核试剂的作用。