Heteroatom-directed lateral lithiation: synthesis of isoquinoline derivatives from <i>N</i>-(<i>tert</i>-butoxycarbonyl)-2-methylbenzylamines
作者:Robin D. Clark、Jahangir、James A. Langston
DOI:10.1139/v94-005
日期:1994.1.1
Methodology for the preparation of isoquinoline derivatives from N-(tert-butoxycarbonyl)-2-methylbenzylamines (1) was developed. Conversion of 1 to the dilithio species followed by condensation with DMF afforded Boc-3-hydroxy-1,2,3,4-tetrahydroisoquinolines 3, which could be dehydrated to 1,2-dihydroisoquinolines 4. Hydrogenation of dihydro compounds 4 afforded the corresponding tetrahydroisoquinolines
开发了从 N-(叔丁氧基羰基)-2-甲基苄胺 (1) 制备异喹啉衍生物的方法。1 转化为二锂物种,然后与 DMF 缩合得到 Boc-3-羟基-1,2,3,4-四氢异喹啉 3,其可以脱水为 1,2-二氢异喹啉 4。二氢化合物 4 的氢化得到相应的四氢异喹啉 5. 用 N-甲氧基-N-甲基酰胺处理来自 1 的二锂物种得到酮 14,将其转化为 3-取代的二氢异喹啉 15、四氢异喹啉 (16, 17) 或异喹啉 (20)。