Six new 2-(2-phenylethyl)chromones from Agarwood.
Six new chromones, 6-methoxy-2-[2-(3-methoxy-4-hydroxyphenyl)ethyllchromone (2), 6,8-dihydroxy-2-(2-phenylethyl)chromone (3), 6-hydroxy-2-[2-(4-hydroxyphenyl)ethyl]chromone (4), 6-hydroxy-2-[2-(2-hydroxyphenyl)ethyl]chromone (5), 7-hydroxy-2-(2-phenylethyl)chromone (6), and 6-hydroxy-7-methoxy-2-(2-phenylethyl)chromone (7) were isolated from the ether extract of agarwood in addition to a known compound, 2-(2-phenylethyl)chromone or flidersiachromone (1). Their structures were determined by spectroscopic methods including UV, IR, and NMR spectral data and comparisons with the calculated values using the hydroxyl and methoxyl substituent increments of the chromone ring.
Konishi
Tenji
T
Kyoto Pharmaceutical University, Japan. konishi@mb.kyoto-phu.ac.jp
Konoshima
Takao
T
Shimada
Yasuo
Y
Kiyosawa
Shiu
S
D002867:Chromones / Q000737:chemistry / Q000302:isolation & purification*; D010944:Plants / Q000737:chemistry*; D013057:Spectrum Analysis
D002867:Chromones