中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-羟基烟酸 | 5-hydroxynicotinic acid | 27828-71-3 | C6H5NO3 | 139.111 |
5-氯烟酸乙酯 | Ethyl-5-chlornicotinat | 20825-98-3 | C8H8ClNO2 | 185.61 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-羟基-6-碘-3-吡啶羧酸乙酯 | ethyl 5-hydroxy-6-iodonicotinate | 59288-40-3 | C8H8INO3 | 293.061 |
5-苄氧基烟酸 | 5-(benzyloxy)nicotinic acid | 263270-34-4 | C13H11NO3 | 229.235 |
A method for the HMPA (hexamethylphosphoric triamide)-catalyzed metal-free transfer hydrogenation of pyridines has been developed. The functional group tolerance of the existing reaction conditions provides easy access to various piperidines with ester or ketone groups at the C-3 site. The suitability of this method for the reduction of other N-heteroarenes has also been demonstrated. Thirty-three examples of different substrates have been reduced to designed products with 45–96% yields.
已经开发出一种六甲基磷酰三胺(HMPA)催化的无金属转移氢化吡啶的方法。现有反应条件下的官能团耐受性使得容易获得C-3位点带有酯基或酮基的各种哌啶。还证明了这种方法适用于还原其他N-杂芳烃。已经有33个不同底物的例子被还原为设计的产品,产率为45-96%。