Study of 1-deoxy-1-(indol-3-yl)-l-sorbose, 1-deoxy-1-(indol-3-yl)-l-tagatose, and their analogs
作者:Sergey N Lavrenov、Alexander M Korolev、Marina I Reznikova、Andrey V Sosnov、Maria N Preobrazhenskaya
DOI:10.1016/s0008-6215(02)00404-4
日期:2003.1
Alkaline degradation of the ascorbigen 2-C-[(indol-3-yl)methyl]-alpha-L-xylo-hex-3-ulofuranosono-1,4-lactone (1a) led to a mixture of 1-deoxy-1-(indol-3-yl)-L-sorbose (2a) and 1-deoxy-1-(indol-3-yl)-L-tagatose (3a). The mixture of diastereomeric ketoses underwent acetylation and pyranose ring opening under the action of acetic anhydride in pyridine in the presence of 4-dimethylaminopyridine (DMAP)
抗坏血酸2-C-[((吲哚-3-基)甲基]-α-L-二甲苯基-hex-3-ulofuranosono-1,4-内酯(1a)的碱性降解导致1-deoxy-1的混合物-(吲哚-3-基)-L-山梨糖(2a)和1-脱氧-1-(吲哚-3-基)-L-塔格糖(3a)。非对映体酮糖的混合物在4-二甲基氨基吡啶(DMAP)存在下,在乙酸酐的吡啶中,在乙酸酐的作用下进行乙酰化和吡喃糖开环,形成(E)-2,3,4,5,6-混合物五-O-乙酰基-1-脱氧-1-(吲哚-3-基)-L-木基-己基-1-烯醇(4a)和(E)-2,3,4,5,6-penta-O -乙酰基-1-脱氧-1-(吲哚-3-基)-L-lyxo-己基-1-烯醇(5a),将其色谱分离。4a或5a脱乙酰基提供环化的四醇,将其甲苯磺酸化混合可生成1-deoxy-1-(吲哚-3-yl)-3,5-di-O-甲苯磺酰基-α-L-山梨糖醛糖(12a)和1 -脱氧-