Retrodihydrochalcones in Sorghum species: Key intermediates in the biosynthesis of 3-deoxyanthocyanidins?
作者:Ali Khalil、Raymonde Baltenweck-Guyot、Rubén Ocampo-Torres、Pierre Albrecht
DOI:10.1016/j.phytol.2011.12.004
日期:2012.3
Two new open chain flavonoids were isolated from the butanediol/ethanol extract of Sorghum bicolor (L.) Moench leaf sheaths by fractionation and purification processes. This work led to the structural characterization of the 3-(2,4,6-trihydroxyphenyl)-1-(4-hydroxyphenyl)-propan-1-one (or 2,4,4′,6-tetrahydroxydihydrochalcone) 1, and 3-(2,6-dihydrox-4-methoxyphenyl)-1-(4-hydroxyphenyl)-propan-1-one (or
通过分馏和纯化过程从高粱双色(Moench)叶鞘的丁二醇/乙醇提取物中分离出两个新的开链类黄酮。这项工作导致了3-(2,4,6-三羟基苯基)-1-(4-羟基苯基)-丙-1-酮(或2,4,4',6-四羟基二氢查耳酮)1的结构表征,以及3-(2,6-二氢-4-甲氧基苯基)-1-(4-羟基苯基)-丙-1-酮(或2,4',6-三羟基-4-甲氧基二氢-查耳酮)2。这些类黄酮的结构通过广泛的光谱分析确定,包括UV,ESIMS,HRESIMS,1D和2D NMR。1的化学性质与文献中较早的关于apiforol的描述相似,但从未完全表征。这些结果导致我们质疑这种黄烷-4-醇的真实结构,该醇通常被描述为存在于高粱中,甚至被认为是高粱3-脱氧花青素形成的关键中间体。