A formal total synthesis of anti - Helicobacter pylori agent (+)-spirolaxine methyl ether
作者:Sunita K. Gadakh、Arumugam Sudalai
DOI:10.1016/j.tetlet.2015.11.047
日期:2016.1
A convergent, formal enantioselective synthesis of anti-Helicobacter pylori agent, (+)-spirolaxine methyl ether 2 has been achieved in high enantiomeric purity starting from commercially available 1,5-pentanediol. The strategy mainly comprises of the Noyori’s asymmetric reduction and Brown allylation/Cu-catalyzed lactonization as the key step for the construction of key chiral intermediates, spiroketal
从商业上可获得的1,5-戊二醇开始,以高对映体纯度实现了抗幽门螺杆菌试剂(+)-螺菌灵甲基醚2的收敛形式的对映选择性合成。该策略主要包括Noyori的不对称还原和Brown烯丙基化/ Cu催化的内酯化,这是构建关键手性中间体,螺环酮3和邻苯二甲酸酯片段4的关键步骤。