Mizuno Masahiro, Yamano Mitsuhisa
Chemical Development Laboratories, Pharmaceutical Production Division, Takeda Pharmaceutical Company Limited, 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan.
Org Lett. 2005 Aug 18;7(17):3629-31. doi: 10.1021/ol051080k.
A novel one-pot synthesis of anilines from phenols was developed. Using this methodology, anilines are produced in good yield (86%) by a reaction of phenols with 2-bromo-2-methylpropionamide and NaOH in DMA via Smiles rearrangement. Phenols, which are substituted electron-withdrawing groups, are more reactive for Smiles rearrangement. Thiophenols are also converted to anilines. The process is a convenient, safe, and inexpensive method for large-scale preparation of anilines. [reaction: see text]
开发了一种由酚类化合物一锅法合成苯胺的新方法。采用该方法,通过酚类化合物与2-溴-2-甲基丙酰胺和氢氧化钠在N,N-二甲基乙酰胺中经由斯迈尔斯重排反应,可高产率(86%)制备苯胺。带有吸电子取代基的酚类化合物对斯迈尔斯重排反应更具反应活性。苯硫酚也可转化为苯胺。该方法是一种用于大规模制备苯胺的简便、安全且廉价的方法。[反应:见正文]