Annelation of drotaverine by p-quinones to form hydroxyindolo- and hydroxybenzindoloisoquinoline derivatives
作者:L. Yu. Ukhin、T. N. Gribanova、L. G. Kuz’mina
DOI:10.1007/s11172-005-0319-z
日期:2005.3
1-(3, 4-Diethoxybenzyl)-6, 7-diethoxy-3, 4-dihydroisoquinoline (drotaverine, 1a) reacts with p-benzoquinone (2) and p-naphthoquinone (3) in nitromethane or during fusion to give 5-(3, 4-diethoxyphenyl)-7, 8-diethoxy-3-hydroxy-5a, 10, 11, 12-tetrahydroindolo[2, 1-a]isoquinoline (4) and 7-(3, 4-diethoxyphenyl)-9, 10-diethoxy-5-hydroxy-7a, 12, 13, 14-tetrahydrobenz[g]indolo[2, 1-a]isoquinoline (5), respectively. Compounds 4 and 5 are smoothly alkylated at the oxygen atom in the presence of bases. The structure of one alkylation product, viz., 3-allyloxy-5-(3, 4-diethoxyphenyl)-7, 8-diethoxy-5a, 10, 11, 12-tetrahydroindolo[2, 1-a]isoquinoline, was established by X-ray diffraction analysis.
1-(3,4-二乙氧基苄基)-6,7-二乙氧基-3,4-二氢异喹啉(drotaverine,1a)与对苯醌(2)和对萘醌(3)在硝基甲烷中或在熔合过程中发生反应,生成 5-(3,4-二乙氧基苯基)-7、8-二乙氧基-3-羟基-5a,10,11,12-四氢吲哚并[2,1-a]异喹啉(4)和 7-(3,4-二乙氧基苯基)-9,10-二乙氧基-5-羟基-7a,12,13,14-四氢苯并[g]吲哚并[2,1-a]异喹啉(5)。在碱存在下,化合物 4 和 5 的氧原子顺利发生烷基化反应。一种烷基化产物,即 3-烯丙氧基-5-(3,4-二乙氧基苯基)-7,8-二乙氧基-5a,10,11,12-四氢吲哚并[2,1-a]异喹啉的结构通过 X 射线衍射分析得以确定。