Unexpected PF6 Anion Metathesis during the Bischler–Napieralski Reaction: Synthesis of 3,4-Dihydroisoquinoline Hexafluorophosphates and Their Tetrahydroisoquinoline Related Alkaloids
作者:Carlos Puerto Galvis、Mario Macías、Vladimir Kouznetsov
DOI:10.1055/s-0037-1610684
日期:2019.5
N-phenethylcinnamamides were subjected to the Bischler–Napieralski reaction to furnish diverse 1-styryl-3,4-dihydroisoquinolines. We noticed that the desired products were unstable when the reaction was performed under conventional solvent conditions. However, when [bmim]PF6 was used as the reaction media, the nature of the Bischler–Napieralski reaction promoted an unusual in situ ionic interchange
抽象的 一系列N-苯乙基肉桂酰胺经过Bischler-Napieralski反应,以提供各种1-styryl-3,4-dihydroisoquinolines。我们注意到,当反应在常规溶剂条件下进行时,所需产物不稳定。但是,当[bmim] PF 6用作反应介质时,Bischler-Napieralski反应的性质促进了该离子液体与二氢异喹啉核心之间异常的原位离子交换,从而导致所需的1-苯乙烯基-苯乙烯的稳定化。 3,4-二氢异喹啉,可将其分离为六氟磷酸盐。最后,一锅还原/还原甲基化过程提供了N-甲基衍生物,证明我们的发现可以是合成四氢异喹啉碱生物碱的一种有效且有用的策略。 一系列N-苯乙基肉桂酰胺经过Bischler-Napieralski反应,以提供各种1-styryl-3,4-dihydroisoquinolines。我们注意到,当反应在常规溶剂条件下进行时,所需产物不稳定。但是,当[bmim]