silyl triflate. The silyl triflate reacted with enolizable esters in the presence of Et3N to afford resin-bound silyl ketene acetals, which undergo Ireland-Claisen rearrangement at elevated temperature to provide polymer silyl esters. Transesterification of the polymeric silyl esters with 5% H2SO4 in 1:1Me/OHClCH2CH2Cl(DCE) afforded methyl ester products.Figure options
用
三氟甲磺酸处理聚
苯乙烯-
二乙基硅烷树脂(PS-DES),以形成高反应性的聚合物三
氟甲
硅烷基甲
硅烷基酯。在Et 3 N存在下,
三氟甲磺酸硅酯与可烯醇化的酯反应,得到与
树脂结合的甲
硅烷基烯酮
缩醛,在高温下进行爱尔兰-克莱森重排,得到聚合物甲
硅烷基酯。用5%H聚合物甲
硅烷基酯的酯交换反应2 SO 4 1Me / OHClCH:在1 2 CH 2 Cl(上DCE),得到甲酯产品。图选项