The Knight route to cyclopiazonic acid: enantioselective synthesis of a key intermediate
作者:Christian Beyer、Jürgen Scherkenbeck、Frank Sondermann、Axel Figge
DOI:10.1016/j.tet.2010.06.092
日期:2010.8
α-cyclopiazonic acid (CPA) is one of the few known inhibitors of sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA) besides thapsigargin and artemisinin. Inhibitors of SERCA hold promise as novel anticancer and antimalarial drugs. Since its structure elucidation three racemic syntheses of α-cyclopiazonic acid have been published. We report now the first enantioselective and high yielding synthesis of a key-intermediate
吲哚生物碱α-环吡嗪酸(CPA)是除毒胡萝卜素和青蒿素外为数不多的肌浆网状Ca 2+ -ATPase(SERCA)抑制剂之一。SERCA抑制剂有望作为新型抗癌和抗疟疾药物。自从其结构阐明以来,已经公开了α-环吡嗪酸的三种外消旋合成。我们现在报告Knight合成的关键中间体的第一个对映选择性和高收率合成,这是目前注册会计师最有效的途径。我们的合成基于非对映选择性的1,4杯酸酯加成,然后对被Evans助剂改性的吲哚基丙烯酸进行烯醇化叠氮化。