作者:Meng-Yang Chang、Ming-Hao Wu、Nein-Chia Lee、Ming-Fang Lee
DOI:10.1016/j.tetlet.2012.02.045
日期:2012.4
A facile three-step protocol toward methoxy isoquinolines 7 starting with substituted 2-allylbenzaldehydes 9 was described. The overall synthetic process of skeleton 7 was carried out using the Grignard addition, PCC-oxidation, and one-pot oxidative cleavage of the olefinic group of skeleton 9 with OsO4–NaIO4 followed by the condensation of the resulting 1,5-dicarbonyl compounds with NH4OAc. Skeleton
描述了一种从取代的2-烯苯甲醛9开始的针对甲氧基异喹啉7的简便三步方案。骨架7的整个合成过程使用格氏加成反应,PCC氧化和骨架9的烯基与OsO 4 -NaIO 4的一锅氧化裂解,然后缩合得到的1,5-二羰基进行与NH 4 OAc的化合物。通过已知的骨架8的克莱森重排和O-甲基化,高产率地制备了骨架9。罂粟碱2也可以通过简单的三步合成协议合成。