Preparation of polythioamides from dialdehydes and 4,4′-trimethylenedipiperidine with sulfur by the Willgerodt–Kindler reaction

摘要: Condensation-type polythioamides have been prepared from bis(dithioester)s or bis(thioester)s with diamines. However, in contrast to the extensive study of polyamides, preparation and characterization limited. The Willgerodt–Kindler reaction is an important method for synthesis thioamides. In reaction, aldehydes ketones amines presence sulfur lead, via oxidation rearrangement, terminal Li et al. recently reported 1,4-dithiocarbonylpiperazines by this reaction. our knowledge, there no applied polymer synthesis. These observations prompted us examine utility one-pot polycondensation dialdehydes diamines afford polythioamides. expected provide a convenient various without necessity bis(thioester)s.