作者:Pradeep K. Sharma、Rajan N. Shah、Jeremy P. Carver
DOI:10.1021/op800059y
日期:2008.9.19
The large-scale synthesis of Swainsonine 1, a potent α-mannosidase II inhibitor, has been achieved with several improvements. The key modifications were (a) performing the Wittig olefination under mild conditions and isolation of the product 4 with modified workup conditions, (b) introduction of the azido group on a large scale under Mitsunobu conditions to produce 12, (c) performing the 1, 3-dipolar
强大的α-甘露糖苷酶II抑制剂Swainsonine 1的大规模合成已取得了一些进展。关键的修饰是(a)在温和条件下进行Wittig烯化反应,并在修饰的后处理条件下分离产物4;(b)在Mitsunobu条件下大规模引入叠氮基以生产12,(c)进行1 ,未活化的叠氮化物12的3-偶极环加成以提供亚氨基羧酸酯7,(d)在弱酸性条件下由7形成酰胺10,以及(e)分离最终化合物1作为稳定的盐酸盐。另外,通过伸缩四个步骤,由12完成11的合成。