A new enzyme catalysis: 3,4-dioxidation of some aryl β-d-glycopyranosides by fungal pyranose dehydrogenase
作者:Petr Sedmera、Petr Halada、Clemens Peterbauer、Jindřich Volc
DOI:10.1016/j.tetlet.2004.09.149
日期:2004.11
Quinone-dependent pyranose dehydrogenase presents a new tool for versatile conversions of numerous carbohydrates to their di- and tricarbonyl derivatives. This enzyme purified from the basidiomycete Agaricus meleagris catalysed dioxidation of several aromatic β-d-glucopyranosides and a β-d-xylopyranoside into the corresponding 3,4-didehydro-β-d-aldopyranosides (β-d-aldopyranosid-3,4-diuloses) in high
醌依赖性吡喃糖脱氢酶为多种碳水化合物向其二羰基和三羰基衍生物的多功能转化提供了一种新工具。该酶是从姬松茸姬松茸中纯化的,将几种芳香族β-d-吡喃葡萄糖苷和β-d-吡喃吡喃糖苷二氧化为相应的3,4-didehydro-β-d-醛糖吡喃糖苷(β-d-aldopyranosid-3,4-的高收率,对于4-硝基苯基糖苷而言通常> 80%。这些新化合物在水溶液中被双重水合。根据原位NMR研究,反应中间体为相应的3-和4-脱氢化合物。相似的异头异构α-糖苷仅在C-3处一步氧化为3-脱氢-α-d-醛糖吡喃糖苷(α-d-吡喃糖苷-3-uloses)。