An Efficient Synthesis of the Potent Dopamine D1 Agonist Dinapsoline by Construction and Selective Reduction of 2′-Azadimethoxybenzanthrone
作者:Tim Sattelkau、Amjad M. Qandil、David E. Nichols
DOI:10.1055/s-2001-10809
日期:——
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。