1-氯异喹啉可作为医药合成中间体使用,例如制备化合物1-苯基异喹啉。1-氯异喹啉可通过N-乙烯基苯甲酰胺为原料进行制备。
制备过程将磁力搅拌棒加入到25mL Schlenk管中,并确保其干燥。依次加入0.2mmol N-乙烯基苯甲酰胺、3mol% [Cp*RhCl₂]₂(4.8mg)、0.2mmol Ag₂O(49.6mg)、0.5mmol t-BuOLi(40mg)和1mL 甲苯。在氮气保护下,将反应混合物置于50°C的烤箱中搅拌5小时后过滤。随后通过真空蒸发溶剂,并使用快速柱色谱纯化粗产物(硅胶,洗脱剂为石油醚与乙酸乙酯,PE:EA=5:1),最终获得N-(1-氧代-2-乙烯基-1,2,3,4-四氢异喹啉-3-基)苯甲酰胺。
将磁力搅拌棒加入到新的25mL Schlenk管中,并确保其干燥。依次加入0.2mmol N-(1-氧代-2-乙烯基-1,2,3,4-四氢异喹啉-3-基)苯甲酰胺、过量2倍的POCl₃和1mL 甲苯。将反应混合物在80°C下搅拌12小时后过滤,并通过真空蒸发溶剂进行纯化。最终通过快速柱色谱(硅胶,洗脱剂为石油醚与乙酸乙酯,PE:EA=5:1)获得1-氯异喹啉。
该化合物可用于锰催化的芳基和卤化烷基镁的偶联反应,也可用于钯催化的异芳基硼酸和酯的偶联反应。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
异喹啉 | isoquinoline | 119-65-3 | C9H7N | 129.161 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1-chloroisoquinoline 2-oxide | 55417-70-4 | C9H6ClNO | 179.606 |
5-氨基-1-氯异喹啉 | 1-chloroisoquinolin-5-amine | 374554-54-8 | C9H7ClN2 | 178.621 |
4-溴-1-氯异喹啉 | 4-bromo-1-chloroisoquinoline | 66728-98-1 | C9H5BrClN | 242.502 |
—— | 1-Chloro-isoquinoline-6-sulfonyl chloride | 205055-64-7 | C9H5Cl2NO2S | 262.116 |
异喹啉 | isoquinoline | 119-65-3 | C9H7N | 129.161 |
Halodimethylsulfonium halide 1, which is readily formed in situ from hydrohaloic acid and DMSO, is a good nucleophilic halide. This activated nucleophilic halide rapidly converts aryldiazonium salt prepared in situ by the same hydrohaloic acid and nitrite ion to aryl chlorides, bromides, or iodides in good yield. The combined action of nitrite ion and hydrohaloic acid in DMSO is required for the direct transformation of aromatic amines, which results in the production of aryl halides within 1 h. Substituted compounds with electron-donating or -withdrawing groups or sterically hindered aromatic amines are also smoothly transformed to the corresponding aromatic halides. The only observed by-product is the deaminated arene (usually <7%). The isolated aryldiazonium salts can also be converted to the corresponding aryl halides using 1. The present method offers a facile, one-step procedure for transforming aminoarenes to haloarenes and lacks the environmental pollutants that usually accompany the Sandmeyer reaction using copper halides. Key words: aminoarenes, haloarenes, halodimethylsulfonium halide, halogenation, amination.