作者:Jhillu Yadav、Tenneti Rao、Nagendra Yadav、Kovvuru Rao、Basi Reddy、Ahmad Al Khazim Al Ghamdi
DOI:10.1055/s-0031-1289699
日期:2012.3
highly stereoselective total synthesis of (+)-bourgeanic acid has been accomplished by an enzymatic desymmetrization approach to create two methyl chiral centers. Other key steps involved in this approach are a Wittig reaction, a Gilman reaction, and TEMPO/iodobenzene diacetate mediated selective oxidation of the 1,3-diol, Yamaguchi lactonization and lithium hydroxide mediated partial hydrolysis (saponification)
已经通过酶促脱对称化方法产生了两个甲基手性中心,从而实现了(+)-布尔基尿酸的高度立体选择性全合成。此方法涉及的其他关键步骤是Wittig反应,Gilman反应和TEMPO /碘苯二乙酸酯介导的1,3-二醇的选择性氧化,山口内酯化作用和氢氧化锂介导的八元环双内酯的部分水解(皂化作用) 酶促不对称化-脂肪族底物-(+)-硼烷酸-硼烷内酯-(-)-半葡糖酸-Wittig反应-Gilman反应-山口内酯化