simple strategy for 7′-esterification of 1 under mild conditions (three steps, up to 80% overall yield) was developed. Compared to hydroxymatairesinol (1) (log K′w = 1.49), the derivatives (2–5) had increased lipophilicity with log K′w > 3.1, as determined by a UHPLC method. Compounds 1–5 exhibited potent antioxidant properties in the same range as the standards ascorbic acid and α-tocopherol (IC50
当从C位的羟基上进行酯化反应时,从冷杉(Abies alba),云杉(Picea abies)和道格拉斯冷杉(Pseudotsuga menziesii)的the节木中提取的
木脂素7'-hydroxymatairesinol(1)表现出出乎意料的反应性。 -7'。为了规避快速的分子内环化过程,定量地导致木脂分枝孢菌素(7),开发了一种在温和条件下(3步,总收率高达80%)进行1'的7 '酯化的简单策略。相比hydroxymatairesinol(1)(对数ķ '瓦特= 1.49),所述衍
生物(2 -5)曾与日志增加亲脂性ķ '瓦特> 3.1,如通过UHPLC方法测定。化合物1 - 5种在相同的范围内的标准
抗坏血酸和α
生育酚表现出强效的抗氧化性质(IC 50 = 20-25μM),并使用
DPPH自由基清除测定比
BHT的更高。