Synthetic Haptens and Monoclonal Antibodies to the Cyanotoxin Anatoxin‐a
作者:Guillermo Quiñones‐Reyes、Consuelo Agulló、Josep V. Mercader、Antonio Abad‐Somovilla、Antonio Abad‐Fuentes
DOI:10.1002/anie.201904002
日期:2019.7
availability of monoclonal antibodies enabling the sensitive and specific detection of anatoxin‐a, a cyanotoxin involved in numerous cases of animal poisoning resulting from toxic algal blooms in freshwaters. Through the synthesis of three functionalized derivatives of anatoxin‐a, we have succeeded in generating the first‐ever reported immunoreagents (bioconjugates and antibodies) suitable for the development
A formal synthesis of anatoxin-a was accomplished by using rhodium-catalyzed formal amide insertion reaction. The key reaction was performed on a gram scale using 0.4 mol % of Rh2(NHCOtBu)4 catalyst, affording a 9-azabicyclo[4.2.1]nonane derivative in good yield. The nitrogen-bridged molecule was converted to Wiseman's intermediate through diastereoselective reduction, site-selective deoxygenation
通过使用铑催化的正式酰胺插入反应,可以完成anatoxin-a的正式合成。使用0.4mol%的Rh 2(NHCO t Bu)4催化剂以克为单位进行关键反应,以良好的收率得到9-氮杂双环[4.2.1]壬烷衍生物。氮桥联分子通过非对映选择性还原,位点选择性脱氧和官能团互变而转化为Wiseman中间体。