Synthesis of new substituted 7,12-dihydro-6,12-methanodibenzo[<i>c,f</i>]azocine-5-carboxylic acids containing a tetracyclic tetrahydroisoquinoline core structure
作者:Agnieszka Grajewska、Maria Chrzanowska、Wiktoria Adamska
DOI:10.3762/bjoc.17.168
日期:——
A convenient and simple protocol has been developed for the synthesis of a series of new tetracyclic tetrahydroisoquinoline derivatives, 7,12-dihydro-6,12-methanodibenzo[c,f]-azocine-5-carboxylic acids by three component Petasis reaction with the use of aminoacetaldehyde acetals bearing substituted benzyl groups as the amine components followed by Pomeranz–Fritsch double cyclization reaction. By applying
开发了一种方便、简单的方案,通过三组分 Petasis 反应合成一系列新型四环四氢异喹啉衍生物 7,12-二氢-6,12-亚甲基二苯并[ c,f ]-偶氮辛-5-羧酸。使用带有取代苄基的氨基乙醛缩醛作为胺组分,然后进行 Pomeranz-Fritsch 双环化反应。通过应用该方法,已经以令人满意的收率制备了几种酸。观察到 Petasis 反应产物在稀 HCl 溶液中形成苯基甘氨酸衍生物的前所未有的化学行为,并提出了解释这种反应性的机制。