solution (2 mL), followed by the addition of water and Et3N (2.0 mmol) and further stirring at room temperature for 1h. Subsequent workup with 5% NaHCO3 (20 mL) and purification afforded α,β- unsaturated aldehydes. Eighteen aryl propargyl alcohol substrates with a terminal α-acetylenic group were transformed in good to excellent yields (71-85%) to enals. The methodology proved successful with secondary
由三苯膦氧化物(Ph3PO)与
三氟甲磺酸酐(Tf2O)(
化学计量比为2:1)反应制得的Hendrickson试剂(三苯基phosph酸酐
三氟甲磺酸盐)可促进脱
水和各种偶联反应。该试剂已用于将
肟转化为腈并通过烷氧基phosph盐的中间体制备酯,酰胺和许多其他官能团。证明该试剂可用于杂环合成
噻唑啉,
咪唑啉,
喹啉前体,
异喹啉,β-咔啉,
菲啶,11Hindolo [3,2-c]
喹啉,
喹啉-内酯,
呋喃喹啉酮和
吲哚并[1,2-b]
喹啉- 9(11H)-个。而且,该试剂对于成功合成几种
天然产物至关重要。在室温下,在一当量的三苯基phosph酸酐三
氟甲烷磺酸盐的存在下,在
二氯甲烷中,带有末端α-炔基的芳基炔
丙醇快速转化为相应的α,β-不饱和醛。该反应包括在0°C和N2气氛下,将新鲜蒸馏的Tf2O(1.0 mmol)添加到Ph3PO(2.0 mmol)在
CH2Cl2(10 mL)中的溶液中。搅拌10分钟后,加入作为CH