Synthesis of chromones and 4-hydroxyquinolines based on uncatalyzed condensations of 1-methoxy-1,3-bis(trimethylsilyloxy)-1,3-butadiene with 2-alkoxy- and 2-nitrobenzoyl chlorides and related reactions
作者:Thomas Rahn、Bettina Appel、Wolfgang Baumann、Haijun Jiao、Armin Börner、Christine Fischer、Peter Langer
DOI:10.1039/b901092k
日期:——
of 1-methoxy-1,3-bis(trimethylsilyloxy)-1,3-butadiene with 2-methoxybenzoyl chlorides afforded 3,5-diketoesters which were transformed, by treatment with boron tribromide, into functionalized 2-hydroxychroman-4-ones or chromones. The reaction of 1-methoxy-1,3-bis(trimethylsilyloxy)-1,3-butadiene with 2-nitrobenzoyl chlorides and subsequent reduction of the nitro group afforded functionalized 4-hydroxyquinolines
的反应 1-甲氧基-1,3-双(三甲基甲硅烷氧基)-1,3-丁二烯 用2-甲氧基苯甲酰氯得到3,5-二酮酸酯,通过用 三溴化硼,转化为功能化的2-hydroxychroman-4-ones或色酮。的反应1-甲氧基-1,3-双(三甲基甲硅烷氧基)-1,3-丁二烯用2-硝基苯甲酰氯洗涤,随后还原硝基,得到官能化的4-羟基喹啉。通过NMR光谱和计算方法研究了它们的互变异构平衡。