Synthesis of 2-Aryl- and 2-Heteroaryl-3,5-dimethoxy-1,4-benzoquinones Involving Pd-Catalyzed Cross-Coupling of (2,3,4,6-Tetramethoxyphenyl)boronic Acid
作者:Enio José Leão Lana、Fernando Carazza、Rosilene Aparacida de Oliveira
DOI:10.1002/hlca.200490162
日期:2004.7
A series of 2-aryl- and 2-heteroaryl-substituted 3,5-dimethoxy-1,4-benzoquinones (compounds 27–36) have been synthesized by cross-coupling of (2,3,4,6-tetramethoxyphenyl)boronic acid (2) with aromatic bromides or iodides in the presence of [Pd0(Ph3)4] and Na2CO3, followed by AgO-promoted oxidation of the resulting biaryl compounds 17–26.
通过(2,3,4,6-四甲氧基苯基)硼的交叉偶联合成了一系列2-芳基和2-杂芳基取代的3,5-二甲氧基-1,4-苯醌(化合物27 – 36)。酸(2)与在[钯的存在下的芳族溴化物或碘化物0(PH 3)4 ]和Na 2 CO 3,接着将得到的二芳基的的AgO促进的氧化化合物17 - 26。