Effective Synthesis of ortho-Substituted Trithiophenol Amines by Miyazaki-Newman-Kwart Rearrangement
作者:Blerina Gjoka、Francesco Romano、Cristiano Zonta、Giulia Licini
DOI:10.1002/ejoc.201100977
日期:2011.10
An efficient synthesis of ortho-substituted trithiophenol amines from commercially available salicaldehydes by Miyazaki–Newman–Kwart rearrangement/threefold reductive amination is reported. The rearrangement has been carried out on salicaldehyde-O-thiocarbamates using microwave induced heating, which furnishes a series of thiosalicaldehyde-S-carbamates in high yield. The thiocarbamate has three roles:
报道了通过宫崎-纽曼-克瓦特重排/三重还原胺化从市售水杨醛有效合成邻位取代的三苯硫酚胺。使用微波诱导加热对水杨醛-O-硫代氨基甲酸酯进行了重排,得到了一系列高产率的硫代水杨醛-S-氨基甲酸酯。硫代氨基甲酸酯具有三个作用:它能够有效地进行 S-O 重排,在三重还原胺化过程中充当保护基团,并且可以在还原条件下轻松去除。三步合成的总产率为 30-35%,它能够以结构系统的方式获得一系列越来越重要的 C3v 对称配体。