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ANALYSIS OF BENZYLATION PRODUCTS OF (+)-CATECHIN

机译:(+)-儿茶素苯甲酰化产物的分析

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摘要

Catechin,a flavanol compound from tea leaves,is one of useful starting materials in many synthetic studies toward various flavonoids.For synthesis,benzyl group is frequently chosen for protecting phenolic hydroxyl groups.To clarify the reactivity of each hydroxyl groups of catechin and realize an efficient reaction condition,we analyzed the products of the benzylation reaction of (+)-catechin.Two known and five new compounds were purified from the reaction mixture and their structure was determined.Not only O-benzylated products,but also 6 and/or 8-C-benzylated compounds were obtained.However,3-OH group was never benzylated in this reaction.
机译:儿茶素是一种来自茶叶的黄烷醇化合物,是许多合成研究中对各种类黄酮有用的起始原料之一。在合成中,经常选择苄基来保护酚羟基。为了阐明儿茶素中每个羟基的反应性并实现在有效的反应条件下,我们分析了(+)-儿茶素的苄基化反应产物。从反应混合物中纯化了两种已知的五种新化合物,并确定了它们的结构。不仅有O-苄基化产物,还有6种和/或获得了8-C-苄基化的化合物。但是,该反应中从未将3-OH基团苄基化。

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