Convenient Multigram Scale Glycosylations of Scented Alcohols Employing Phase‐Transfer Reactions
作者:Lars Kröger、Joachim Thiem
DOI:10.1081/car-120019010
日期:2003.1.3
trichloroacetimidate, Fischer–Raske, phase‐transfer methods) of 3‐ethoxy‐4‐hydroxybenzaldehyde (ethyl vanillin), 3‐hydroxy‐2‐methyl‐4‐pyranone (maltol) and 2,5‐dimethyl‐4‐hydroxy‐3(2H)‐furanone (furaneol®) were evaluated, taking into account yields and ease of preparation (e.g., utilized donor, catalyst, conditions). The best results were achieved employing phase transfer catalysis in a two‐phase solvent mixture
3-乙氧基-4-羟基苯甲醛(乙基香兰素),3-羟基-2-甲基-4-甲基-4-吡喃酮(麦芽酚)的糖基化的各种条件(Koenigs–Knorr,Helferich,三氯乙酰亚氨酸,Fischer–Raske,相转移方法)和评估了2,5-二甲基-4-羟基-3(2H)-呋喃酮(furaneol®),并考虑了收率和易于制备(例如,利用的供体,催化剂,条件)。在两相溶剂混合物中进行相转移催化可实现最佳结果。为了增加水溶性以更好地适用,合成了相应醇迄今未知的麦芽糖苷,再次证明了相转移条件对于酚糖基化的价值。†在彼得·韦尔泽尔(Peter Welzel)教授65岁生日之际献给他。