作者:Mark Cushman、Dhanapalan Nagarathnam
DOI:10.1016/s0040-4039(00)97100-4
日期:1990.1
A general method for the facile synthesis of ring-A hydroxylated flavones is described. Treatment of the hydroxylated acetophenones 6a–d with enough lithium bis(trimethyl)silyl amide to deprotonate all of the phenols as well as to generate the lithium enolate of the ketone, followed by addition of the acid chlorides 7a–d, gave the 1,3-diketones 8a–g, which were cyclized to the desired products 9a–g
描述了容易合成环A-羟基黄酮的一般方法。用足够的双(三甲基)甲硅烷基氨基锂处理羟基苯乙酮6a-d,以使所有酚去质子化,并生成酮的烯醇锂,然后添加酰氯7a-d,得到1, 3-二酮8a-g,高产率地环化成所需的产物9a-g。