CF3-containing building block (3) was prepared. Stereospecific Suzuki cross-coupling of compound 3 with a variety of aryl boronic acids gave the corresponding resin-bound coupling products (4), which can be cleaved with sodium methoxide to afford methyl (E)-3-aryl-4,4,4-trifluoro-2-butenoate (5). 1,3-Dipolar cycloaddition of compound 3 with aryl nitrile oxides followed by cleavage with TFA led to methyl
制备了新型的
树脂结合的含CF 3的结构单元(3)。化合物3与各种芳基
硼酸的立体定向Suzuki交叉偶联反应得到相应的
树脂结合偶联产物(4),可以用
甲醇钠裂解该产物,得到甲基(E)-3-芳基-4,4,4 -三
氟-
2-丁烯酸酯(5)。化合物3与芳基腈氧化物的1,3-偶极环加成,然后用TFA裂解导致区域选择性地由3- NMR确定了3-芳基-5-三
氟甲基-4-
异恶唑羧酸甲酯。