PS-IIDQ: a supported coupling reagent for efficient and general amide bond formation
作者:Eric Valeur、Mark Bradley
DOI:10.1016/j.tet.2007.06.019
日期:2007.9
Polystyrene-IIDQ, a polymer-supported coupling reagent, was synthesized in three steps from Merrifield resin in 86% overall conversion. This reagent efficiently coupled carboxylic acids to amines in good yields and high purities, required no pre-activation step, and was tolerant of the order of reagent addition. PS-IIDQ was observed to be more efficient than polymer-supported carbodiimides (PS-EDC and
由Merrifield树脂分三步合成了聚合物支撑的偶联剂聚苯乙烯-IIDQ,总转化率为86%。该试剂以高收率和高纯度将羧酸有效地偶联到胺上,不需要预活化步骤,并且可以耐受试剂添加的顺序。观察到PS-IIDQ比聚合物负载的碳二亚胺(PS-EDC和PS-DCC)更有效,并且在一般的酰胺键形成(包括苯胺和受阻底物偶联)方面,其收率高于HATU。用五种羧酸和九种胺(包括苯胺和仲胺)进行评估时,PS-IIDQ的平均分离收率为73%。