| 1107692-70-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氮杂萘
• CAS: 1107692-70-5
• 化学式: C₄₁H₃₂N₄O₉
• 分子量: 724.726
• InChiKey: ITOHYNNYZNQNEK-HWTKLJGTSA-N

反应信息

• 作为产物：
  描述：

  (-)-倍儿茶酸 、 邻苯二胺 在 Japanese pear homogenate 、 溶剂黄146 作用下， 以 水 、 乙醇 为溶剂， 反应 4.0h， 以46.7 mg的产率得到
  参考文献：
  名称：

  Enzymatic oxidation of gallocatechin and epigallocatechin: Effects of C-ring configuration on the reaction products

  摘要：

  Tea leaf is rich in pyrogallol-type catechins, and their oxidation is important in the generation of black tea polyphenols. In the present study, the enzymatic oxidation of three pyrogallol-type catechins, (+)- and (-)-gallocatechins and (-)-epigallocatechin, was compared. The reactions yielded unstable quitione products, which were trapped as condensation products with o-phenylenediamine. The oxidation of' (+)-gallocatechin proceeded very slowly compared to the reaction of (-)-epigallocatechiii, and yielded a proepi t hea fl agallin- type dimer as the major product, though oxidation of (-)-epigallocatechin gave predominantly dehydrotheasinensin C. The cis-con figuration of' the C-3 hydroxyl group and the B-ring of (-)-epigallocatechin was apparently crucial for rapid and selective production of dehydrotheasinensin C. Oxidation of (-)-gallocatechin proceeded in a manner similar to that of (+)-gallocatechin, and produced an enantiomer of the (+)-gallocatechin product. The results suggest that enzymes catalyze oxidation of the pyrogallol B-ring to the o-quinone, with subsequent non-enzymatic coupling reactions proceed under highly steric control. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.phytochem.2007.08.007