An Improved Synthesis of (3<i>R</i>)-2-(<i>tert</i>-Butoxycarbonyl)-7-hydroxy-1,2,3,4-tetrahydroisoquinoline-3-carboxylic Acid
作者:F. Carroll、Cong Liu、James Thomas、Larry Brieaddy、Bertold Berrang
DOI:10.1055/s-2008-1032211
日期:2008.3
An improved synthesis of (3 R)-2-( TERT-butoxycarbonyl)-7-hydroxy-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid is described wherein a modified Pictet-Spengler reaction was employed to provide 95% yield of the product with 7% racemization or less. The enantiomeric excess of the final product was improved to 99.4% via recrystallization. The overall yield of this four-step synthesis provides the title
描述了 (3 R)-2-(TERT-丁氧基羰基)-7-羟基-1,2,3,4-四氢异喹啉-3-羧酸的改进合成,其中使用改进的 Pictet-Spengler 反应提供 95% 7%或更少的外消旋产物的产率。通过重结晶,最终产物的对映体过量提高到 99.4%。该四步合成的总产率从 D-酪氨酸开始提供 43% 的标题化合物。