Solvent-Free Synthesis of New Bis(Benzimidazole-2-Alkylthio) Polyethylene Oxides Starting from Dithiols
作者:A. Akremi、A. Noubigh
DOI:10.13005/ojc/330209
日期:2017.4.28
Polyethylene oxide (PEO) could be incorporated in molecular structure by several ways. A series of diacid S-alkylpolyethylene oxides 4a-i have been prepared from dithiols 1a-c through multistep reaction sequence. Novel symmetric bis-benzimidazoles (polyethylene oxide) 6a-i have been synthesized over green route. The condensation of the title compounds 4a-i on o-phenylenediamine 5, via the further deamination reaction and without catalyst, afforded the corresponding bis-benzimidazoles 6a-i in acceptable yields. The new compounds were established on the basis of their elemental analysis, IR, 1H NMR, 13C NMR and mass spectral data.
氧化聚乙烯(PEO)可以通过多种方式整合到分子结构中。通过多步反应序列,从二硫醇1a-c制备了一系列二酸S-烷基氧化聚乙烯4a-i。通过绿色路线合成了新颖的对称双苯并咪唑(氧化聚乙烯)6a-i。通过进一步脱氨反应并在没有催化剂的情况下,将标题化合物4a-i与邻苯二胺5缩合,得到了相应的双苯并咪唑6a-i,收率尚可。根据元素分析、红外光谱、1H核磁共振、13C核磁共振和质谱数据,确定了新化合物的结构。