Stereoselective syntheses of the glycosidase inhibitors hyacinthacine A2, hyacinthacine A3 and 5-epi-hyacinthacine A3
作者:Celia Ribes、Eva Falomir、Miguel Carda、J. Alberto Marco
DOI:10.1016/j.tet.2009.06.046
日期:2009.8
Stereoselective syntheses of the naturally occurring glycosidase inhibitors hyacinthacines A2 and A3 are reported. In the case of hyacinthacine A2, the pyrrolizidine system was created from an acyclic precursor via a double cyclization procedure with a one-pot formation of two C–N bonds. In the case of hyacinthacine A3, the two C–N bonds were created in separate steps. In addition, the non-natural
报道了天然存在的糖苷酶抑制剂潮霉素A 2和A 3的立体选择性合成。在使用Hyacinthacine A 2的情况下,吡咯嗪烷体系是由无环前体通过双环化程序从一个无环的前体中形成的,该反应通过一锅法形成两个C–N键。在使用Hyacinthacine A 3的情况下,两个C–N键是在单独的步骤中创建的。另外,获得了风信碱A 3的C-5处的非天然差向异构体。