A unified total synthesis of benzo[<i>d</i>][1,3]dioxole-type benzylisoquinoline alkaloids of aporphines, coptisines, and dibenzopyrrocolines
作者:Jie Lv、Zhi-Hong Li、An-Jun Deng、Hai-Lin Qin
DOI:10.1039/d1ob02258j
日期:——
The first total synthesis of (S)-(+)-ovigerine, (S)-(+)-N-formylovigerine, and (6aS,6a’S)-(+)-ovigeridimerine of aporphine alkaloids with a benzo[d][1,3]dioxole structure feature was established. The strategy was based upon the well-known Pd-catalyzed arylation to set the aporphine framework, and Noyori asymmetric hydrogenation followed by diastereoselective resolution to achieve excellent enantioselectivity
首次全合成( S )-(+)-卵黄黄碱、( S )-(+)- N-甲酰黄绿素和(6a S ,6a' S )-(+)-鸟黄苷与苯并[ d ][1,3]二氧戊环结构特征建立。该策略基于众所周知的 Pd 催化芳基化来设置阿卟啉骨架,以及 Noyori 不对称氢化,然后进行非对映选择性拆分以实现出色的对映选择性。通过稍微修改总合成路线并将其与 aza-Michael 加成、Bischler-Napieralski 反应和N-芳基化策略性地结合起来,该方法也适用于苯并[ d][1,3]二氧杂环戊烯型苯甲基异喹啉类黄连碱类和二苯并吡咯啉类生物碱,包括黄连碱类的两种凤仙花、四氢黄连碱、溴化黄连季碱和两种二苯并吡咯啉类似物,均能高效合成这些目标化合物。在合成的9种化合物中,首次报道了三种阿朴啡和两种凤仙花的总合成,ee值均大于99%。这项工作也代表了苯并[ d ][1,3]二氧杂环戊烯类阿卟啉、黄连素和二苯并吡咯啉全合成合成路线的首次统一。