Studies on Quinones. Part 37. Synthesis and Biological Activity of o-Aminoester Functionalised Benzo- and Naphtho[2,3-b]-thiophenequinones.
作者:Jaime A. Valderrama、Claudio Astudillo、Ricardo A. Tapia、Eric Prina、Emilie Estrabaud、Renaud Mahieux、Alain Fournet
DOI:10.1248/cpb.50.1215
日期:——
The synthesis of 3-amino-2-methoxycarbonyl-4,7-dimethoxybenzo[b]thiophene (5) and benzothieno[3,2-d][1,3]oxazin 15 from 3,6-dimethoxy-2-nitrobenzaldehyde (1) is reported. Benzo[b]thiophene-4,7-quinones 9 and 10 were prepared in good yields by oxidative deprotection of the corresponding dimethoxybenzothiophenes 8 and 7. Cycloaddition reaction of quinone 8 with 1-(E)-trimethylsilyloxy-1,3-butadiene followed
由3,6-二甲氧基-2-硝基苯甲醛(3)合成3-氨基-2-甲氧基羰基-4,7-二甲氧基苯并[b]噻吩(5)和苯并噻吩并[3,2-d] [1,3]恶嗪15 1)被报告。通过将相应的二甲氧基苯并噻吩8和7氧化脱保护,以高收率制备苯并[b]噻吩-4,7-醌9和10。随后将醌8与1-(E)-三甲基甲硅烷氧基-1,3-丁二烯进行环加成反应。酸诱导的芳构化作用可提供萘并[2,3-b]噻吩-4,9-醌13和14。新醌的体外活性对亚马逊利什曼原虫和1型人类T细胞白血病病毒(HTLV) -1)被报告。