Total Synthesis of Isohericerin, Isohericenone, and Erinacerin A: Development of a Copper-Catalyzed Methylboronation of Terminal Alkynes
作者:Bohyun Mun、Sangyong Kim、Hongju Yoon、Ki Hyun Kim、Yunmi Lee
DOI:10.1021/acs.joc.7b00920
日期:2017.6.16
Efficient and concise approaches for the synthesis of three bioactive natural products, isohericerin, isohericenone, and erinacerin A, are described in this paper. The key reactions employed include a Mannich reaction with commercially available hydroxybenzoate and subsequent one-pot lactamization to afford the common precursor isoindolinone in 3 steps and a Suzuki–Miyaura coupling reaction to connect
本文描述了高效,简捷的三种生物活性天然产物合成方法,即异黑素,异黑烯酮和erinacerinA。所采用的关键反应包括与市售的羟基苯甲酸酯进行曼尼希反应以及随后的一锅内酰胺化,可分3步提供常见的前体异吲哚啉酮,以及将香叶基侧链连接至异吲哚啉酮核心的Suzuki-Miyaura偶联反应。另外,通过开发用于功能化的末端炔烃的Cu催化的甲基硼化的高度区域选择性和有效的方法,能够温和且有效地合成异烯酮的C5'-氧化的香叶基侧链单元。