reported. Catalytic amounts of [1,1′-bis(diphenylphosphino)ferrocene] dichloropalladium(II) in combination with NaBH4–TMEDA rapidly hydrodehalogenate chloro(bromo)-pyridines and -quinolines at room temperature in quantitative yields. Chemoselective reduction of 4,7-dichloroquinoline affords 7-chloroquinoline as the sole product in almost quantitative yield. Moreover, palladium(II) acetate-triphenylphosphine
据报道,在
钯催化剂下,
硼氢化钠/ N,N,N',N'-
四甲基乙二胺(NaBH 4 -TME
DA)体系可将卤代
吡啶和
喹啉进行加氢脱卤。催化量的[1,1 ' -双(
二苯基膦基)
二茂铁]在用NaBH组合二
氯化钯(II)4 -TME
DA迅速hydrodehalogenate
氯(
溴)-pyridines并在定量产率室温-quinolines。
化学选择性还原
4,7-二氯喹啉可提供
7-氯喹啉作为唯一产物,几乎定量地收率。此外,
乙酸钯(II)-三苯膦和NaBH 4–TME
DA能够有效还原反应性
溴吡啶和
喹啉。