| 标题 |
 Borohydride Ionic Liquids as Reductants of CO2 in the Selective N-formylation of Amines 硼氢化物离子液体作为CO2选择性N-甲酰化反应的还原剂
相关领域
甲酰胺类
化学
甲酰化
离子液体
硼氢化
甲酰胺
苄胺
胺气处理
选择性
硼烷
产量（工程）
有机化学
绿色化学
溴化物
药物化学
无机化学
催化作用
材料科学
冶金
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| 其它 | Borohydride imidazolium ionic liquids, [IL]BH4, used for the first time as reductants in the N-formylation of various amines with CO2, provided an excellent yield of formamides. Under the same conditions, 5 bar CO2 and 80 °C, NaBH4 produced a mixture of N-formylated and N-methylated products in a ratio of 1 : 2. An alternative approach, based on the addition of halide imidazolium salts ([IL]Cl or [IL]Br) to the reactions of amine with NaBH4 and CO2, resulted in a significant increase of selectivity to formamide. However, no effect was noted for [IL]BF4 and [IL]PF6. Monitoring the reaction course in time using 1H NMR brought about new insight into the role of BH3 in the reduction of CO2 and the functionalization of amines. The formation of N-methylaniline – borane intermediate was evidenced. |
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