Synthesis of 8-aryl-3,5,7,3′,4′-penta-O-methylcyanidins from the corresponding quercetin derivatives by reduction with LiAlH4
作者:Yuki Kimura、Kin-ichi Oyama、Tadao Kondo、Kumi Yoshida
DOI:10.1016/j.tetlet.2017.01.065
日期:2017.3
Synthesis of 8-aryl-3,5,7,3′,4′-penta-O-methylcyanidins from the corresponding quercetin derivatives by reduction with LiAlH4 is reported. Regioselective iodination at the 8-position of penta-O-methylquercetin followed by a Suzuki-Miyaura reaction gave the 8-arylated quercetin derivatives. By the reduction of 8-arylated quercetins using 4 equiv. of LiAlH4 at room temperature for 30 min, the corresponding