New and stable ethyl 1,2-disubstituted 1,2-dihydroisoquinoline-3-carboxylates 6 and 12 a were synthesized in good yields by regioselective addition reactions of alkyl Grignard reagents to lipophilic and soluble isoquinolinium salts 4 and 11. The salts 4 and 11 were obtained quantitatively and directly from isoquinoline-3-carboxylates 1(a,b) with the corresponding alkyl halides 2 or symmetric alkyl dihalides 7 using solventless quaternization reaction conditions and were converted into the corresponding isoquinolinium perfluorobutanesulfonates 4 and 11 a by ionic metathesis.
通过烷基
格氏试剂与亲脂性和可溶性
异喹啉鎓盐 4 和 11 的区域选择性加成反应,合成了新的和稳定的 1,2-二取代 1,2-二氢异
喹啉-3-羧酸乙酯 6 和 12 a,收率良好。在无溶剂季
铵化反应条件下,从异
喹啉-3-羧酸盐 1(a,b)与相应的烷基卤化物 2 或对称烷基二卤化物 7 直接定量获得盐 4 和 11,并通过离子偏析反应转化为相应的
异喹啉全氟丁基磺酸盐 4 和 11 a。