Regio- and Stereoselective Electrophilic Cyclization Approach for the Protecting-Group-Free Synthesis of Alkaloids Lennoxamine, Chilenine, Fumaridine, 8-Oxypseudoplamatine, and 2-<i>O</i>-(Methyloxy)fagaronine
作者:Tuanli Yao、Zhen Guo、Xiujuan Liang、Lihan Qi
DOI:10.1021/acs.joc.8b02154
日期:2018.11.2
protecting-group-free synthesis of alkaloids lennoxamine, chilenine, fumaridine, 8-oxypseudoplamatine, and 2-O-(methyloxy)fagaronine is reported. The core isoindolin-1-one and isoquinolin-1-one structures were built by a silver-catalyzed regio- and stereoselective cyclization of methyl 2-alkynylbenzimidates. The regioselectivity of cyclization was achieved by utilizing the intrinsic functionality of alkaloids.
报导了一种统一的策略,用于生物碱伦诺沙明,苯胺,富马立定,8-氧代伪pla胺和2- O-(甲氧基)法加宁的无保护基合成。核心异吲哚啉-1-酮和异喹啉-1-酮结构是通过银催化的2-炔基苯并咪唑酸甲酯的区域和立体选择性环化而建立的。环化的区域选择性是通过利用生物碱的内在功能实现的。