Polyether imide synthesis

Synthesis and Study of Properties of Aromatic Polyether-Imides on The Basis of Derivatives of Chloral and DDT With Use of... 

Synthesis and Study of Properties of Aromatie Polyether-Imides... 

Within the extensive literature on this subject, there are many examples of the synthesis of thermotropic polyesters, polyesteramides, polycarbonates, polyethers, polyurethanes and polyester-imides. Until recently, the main omissions had been thermotropic polyamides and polyimides however, many examples of polyamides that show lyotropic behaviour have been known for a long time. 

Using the decarboxylative photocyclization, the synthesis of medium- and macrocyclic amines, lactones, polyethers, lactams, as well as cycloalkynes were accessible in ring sizes up to 26 (Scheme 14) and even in multigram quantities. The regioselectivity of the radical cyclization step was studied for unsymmetrically substituted pyridinecarboximides and trimeUitic acid imides, respectively, where the site of the C-C-bond formation is controlled by the maximum spin density of the radical anion intermediates. ... 

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