Polymerization of N,N′-bismaleimido-4,4′-diphenylmethane with arenedithiols. Synthesis of some new polyimidosulphides
✍ Scribed by Jerry E. White; Mark D. Scaia
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 446 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0032-3861
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## Abstract **Summary:** New aromatic polyamides containing two __n__‐alkylphenylimide units fused to the main chain were prepared by the activated polyamidation of 3,6‐di(4‐carboxyphenyl)‐__N__,__N′__‐di(4‐__n__‐alkylphenyl)pyromellitimides (**C**~**__m__**~**DA**, **__m__** = 0, 8, 12, 16) with o
## N-Hydroxyiminoyl chlorides reacted with N-alkyl ethynesulfonamides in the presence of triethylamine in CH 2 Cl 2 to afford the 4-alkyl-3-aryl-4,5dihydro-1,5,2,4-oxathiadiazepine-5,5-diones (3) as the major products together with N-alkyl-3-aryl-5-isoxazolesulfonamides (4).