Flavonoids syntheses. V. Synthesis of flavonoids with three hydroxy and four methoxy groups and their spectral properties.
作者:MUNEKAZU IINUMA、TOSHIYUKI TANAKA、KAZUHIRO ITO、MIZUO MIZUNO
DOI:10.1248/cpb.35.660
日期:——
Twelve flavonoids with three hydroxy and four methoxy groups located at C-2', 3', 4', 5, 6, 6', 7 (1-4), C-2', 3', 4', 5, 6', 7, 8 (5), C-2', 3, 4', 5, 5', 6, 7 (6-11) and C-2', 3, 4', 5, 5', 7, 8 (12) were synthesized to confirm the structure of NAS-3 and to investigate the spectral properties of the hepta-oxygenated flavonoids. The methods used to prepare the tetra-oxygenated benzaldehydes (14-19) for the B ring moieties are also described.
合成了十二种黄酮,分别在C-2'、3'、4'、5、6、6'、7 (1-4),C-2'、3'、4'、5、6'、7、8 (5),C-2'、3、4'、5、5'、6、7 (6-11) 和C-2'、3、4'、5、5'、7、8 (12) 位置上具有三个羟基和四个甲氧基。这些合成的目的是确认NAS-3的结构,并研究七氧化黄酮的光谱特性。此外,还描述了用于B环部分的四氧化苯甲醛(14-19)的制备方法。