8,9-Dihydroxy-2,3,7,11b-tetrahydro-1H-naphth[1,2,3de]isoquinoline (dinapsoline, 1) is a potent dopamine D1 receptor agonist with potential antiparkinsonian activity. A new synthesis was developed with the fully aromatic compound 2 as the key intermediate. The synthesis herein described is suitable for a larger scale preparation of dinapsoline compared to the previously known methods. Furthermore, the
8,9-Dihydroxy-2,3,7,11b-tetrahydro-1H-naphth[1,2,3de]isoquinoline (dinapsoline, 1) 是一种有效的
多巴胺 D1 受体激动剂,具有潜在的抗帕
金森病活性。以全芳族化合物2为关键中间体开发了一种新的合成方法。与先前已知的方法相比,本文所述的合成适用于更大规模地制备地那普林。此外,通过在整个合成过程中保持
异喹啉部分的高氧化态来避免氮的非生产性保护/脱保护步骤。框架的构建是通过 Friedel-Crafts 酰化和市售的
4-溴异喹啉和芳基
硼酸 5 之间的 Suzuki 交叉偶联反应完成的,后者要求将
锂化导向酰胺转化回
羧酸官能团。用
硼氢化钠和
氰基硼氢化钠逐步进行选择性还原。新的合成方法产量高,并减少了先前报道的方法中的转化次数。