Supramolecular structures of aromatic 1,3,4-oxadiazole solids
β Scribed by B. Schulz; L. Brehmer; G. Knochenhauer
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 564 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0928-4931
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## Abstract Six 1,3,4βoxadiazoleβcontaining polyethers with reduced viscosities of 0,65β1,17 dL Β· g^β1^ were synthesized by highβtemperature solution polycondensation of an activated difluoride, 2,5βbis(4βfluorophenyl)β1,3,4βoxadiazole, with aromatic diols possessing a variety of ring structures. T
A new approach to the synthesis of 1,3,4-oxadiazoles on solid support is described. Resin bound 1-acyl thiosemicarbazides were treated with a variety of dehydrating agents at different temperatures, which revealed that thiosemicarbazides were effectively cyclised by 1-(3-dimethylaminopropyl)-3-ethyl
Abstraet--Polyhydrazides with parabanic structures were prepared by polycondensation between a new monomer containing a preformed parabanic ring, viz. 1,3 p(bis-chloroformylphenyl) parabanic acid and dihydrazides. By thermal cyclization with polyphosphoric acid, the polyhydrazides were converted to