Efficient Chemical Synthesis of a Scutellarein Derivative Containing Morpholine Ring
作者:Qian-Ping Shi、Zhi-Hao Shi、Nian-Guang Li、Yu-Ping Tang、Hao- Tang、Wei Zhang、Min-Zhe Shen、Ze-Xi Dong、Peng-Xuan Zhang、Jian-Ping Yang、Jin-Ao Duan
DOI:10.2174/1570178611666140421230118
日期:2014.6
Scutellarin (1) [5,6-dihydroxy-2-(4-hydroxyphenyl)-4-oxo-4H-1-benzopyran-7-yl β-D-glucopyranosiduronic
acid] is very effective in the clinical treatment of cerebral infarction and coronary heart disease in China. Pharmacokinetic
studies showed that scutellarin (1) is readily metabolized to scutellarein (2) [5,6,7-trihydroxy-2-(4-hydroxyphenyl)-4H-1-
benzopyran-4-one] in the intestine by β-glucuronide enzyme prior to absorption. In order to improve the biological
activity of scutellarin (1), our group has previously synthesized many scutellarin derivatives based on their in vivo
metabolic mechanism. The results showed that morpholine ring substituted at C-7 or C-8 position induced better antioxidant
activity, water solubility and anticoagulant activity compared to scutellarin (1). In this paper, an efficient synthetic
method for the construction of 5,6,7-trihydroxy-2-[4-[2-(4-morpholinyl)ethoxy]phenyl]-4H-1-benzopyran-4-one (5) is reported.
This synthetic route will facilitate the synthesis of scutellarein derivatives containing an amine side chain at the C-
4' position.
黄芩苷(1)[5,6-二羟基-2-(4-羟基苯基)-4-氧代-4H-1-苯并吡喃-7-基 β-D-吡喃葡萄糖苷酸]在我国临床治疗脑梗塞和冠心病方面疗效显著。药代动力学研究表明,黄芩苷(1)在吸收前很容易在肠道中被β-葡萄糖醛酸酶代谢为黄芩苷(2)[5,6,7-三羟基-2-(4-羟基苯基)-4H-1-苯并吡喃-4-酮]。为了提高黄芩苷(1)的生物活性,我们课题组根据其体内代谢机制合成了多种黄芩苷衍生物。结果表明,与黄芩苷(1)相比,C-7 或 C-8 位取代的吗啉环具有更好的抗氧化活性、水溶性和抗凝血活性。本文报告了一种构建 5,6,7-三羟基-2-[4-[2-(4-吗啉基)乙氧基]苯基]-4H-1-苯并吡喃-4-酮(5)的高效合成方法。 该合成路线将促进在 C- 4'位置含有胺侧链的黄芩苷衍生物的合成。