substituted 2-allylbenzaldehydes 2 was described. The overall synthetic process was carried out by the domino aldol condensation/Diels–Alder cycloaddition of skeleton 2 with substituted cinnamaldehydes 3 in an alkalic aqueous-methanolic solution followed by base-induced double migration of the resulting cycloadducts. Skeleton 2 was prepared from isovanillin (4) in moderate yield in five-steps via the known
描述了一种针对以取代的2-烯丙基
苯甲醛2为起始的几个取代的3-芳基-
3,4,4a,10-四氢-2 H-
蒽-9-ones 1的简便方案。整个合成过程是通过在碱性
甲醇水溶液中用取代的
肉桂醛3进行骨架2的多米诺羟醛缩合/ Diels-Alder环加成反应,然后由碱诱导的环加合物两次迁移。骨架2是由异
香草醛(4)以五步法通过已知步骤,以O-烯丙基化,Claisen重排,O-甲基化,格利雅(Grignard)甲基化和
PCC介导的氧化的合成顺序分五步制备的。