Synthesis of Novel 13a-(ω-Aminoalkyl)-8-oxoberbines by Means of Reaction of Homophthalic Anhydride with 1-Substituted 3,4-Dihydroisoquinolines. An Unexpected Formation of a Pyrrolo[3,4-<i>i</i>]berbindione
作者:Elena Stanoeva、Angelina Georgieva、Stanislava Avramova、Nikola Burdzhiev、László Lázár
DOI:10.1002/jhet.1965
日期:2015.1
The reaction of 1‐[ω‐(N‐acylated amino)alkyl]‐3,4‐dihydroisoquinolines (7a, 7b, 7c, 7d, 7e) with homophthalic anhydride (1) leads to the formation of 8‐oxo‐13a‐[(N‐acylated amino)alkyl]‐8H‐dibenzo[a,g]quinolizine‐13‐carboxylic acids (8a–e) with predomination of cis diastereomers, together with small amount of trans-8a. cis‐13a‐[(N‐Cbzaminomethyl)]‐8‐oxo‐dibenzoquinolizine‐13‐carboxylic acid (cis-8a)
1- [ω-(N-酰化氨基)烷基] -3,4-二氢异喹啉(7a,7b,7c,7d,7e)与高邻苯二甲酸酐(1)的反应导致形成8-oxo-13a- [(N-酰化氨基)烷基] -8 H-二苯并[ a,g ]喹啉嗪-13-羧酸(8a-e),以顺式非对映异构体占主导地位,以及少量反式8a。顺式-13a-[(N- Cbzaminomethyl)]-8-氧-二苯并喹啉13-13羧酸(cis-8a)在甲醇中适度加热,然后环化成未知的二苯并[ a,g ]吡咯并[3,4- i ]喹啉嗪二酮(10)。