萘[1,2- e ] [1,3]恶嗪[4,3- a ] [1,3]异喹啉和萘[2,1- e ] [1,3]恶嗪[4, 3- α ]异喹啉衍生物
摘要:
通过将1-(β-羟基萘基)-1,2,3,4-四氢异喹啉和1-(α-羟基萘基)-1,2,3,4-四氢异喹啉与甲醛,光气,对硝基苯甲醛或对-环化氯苯基异硫氰酸酯,8-取代的10,11-dihydro-8 H,15b H-萘[1,2- e ] [1,3]恶嗪基[4,3- a ]异喹啉(3和4)和10,11-二氢-8 H,15b H-萘[2,1- e ] [1,3]恶嗪基[4,3- a ]异喹啉(15和16)已准备好。通过NMR光谱对这些杂环的哌啶和1,3-恶嗪部分进行构象分析,并进行了理论研究,结果表明,这两个构象上灵活的六元环部分更喜欢使用扭曲的椅子构象异构体。
萘[1,2- e ] [1,3]恶嗪[4,3- a ] [1,3]异喹啉和萘[2,1- e ] [1,3]恶嗪[4, 3- α ]异喹啉衍生物
摘要:
通过将1-(β-羟基萘基)-1,2,3,4-四氢异喹啉和1-(α-羟基萘基)-1,2,3,4-四氢异喹啉与甲醛,光气,对硝基苯甲醛或对-环化氯苯基异硫氰酸酯,8-取代的10,11-dihydro-8 H,15b H-萘[1,2- e ] [1,3]恶嗪基[4,3- a ]异喹啉(3和4)和10,11-二氢-8 H,15b H-萘[2,1- e ] [1,3]恶嗪基[4,3- a ]异喹啉(15和16)已准备好。通过NMR光谱对这些杂环的哌啶和1,3-恶嗪部分进行构象分析,并进行了理论研究,结果表明,这两个构象上灵活的六元环部分更喜欢使用扭曲的椅子构象异构体。
Microwave-assisted, solvent-free synthesis of 1-(α- or β-hydroxynaphthyl)-1,2,3,4-tetrahydroisoquinolines by the Mannich reaction
作者:István Szatmári、László Lázár、Ferenc Fülöp
DOI:10.1016/j.tetlet.2006.03.169
日期:2006.6
As a new extension of the Mannich reaction of naphthols, 1-(hydroxynaphthyl)-substituted 1,2,3,4-tetrahydroisoquinolines were synthesized by the nucleophilic addition of 1- or 2-naphthol to 3,4-dihydroisoquinolines under solvent-free conditions, using microwave irradiation. The additions to 3-methyl-6,7-dimethoxy-3,4-dihydroisoquinoline proved to be a highly diastereo-selective processes, resulting in the cis isomers as the main or the only products. (c) 2006 Elsevier Ltd. All rights reserved.