Preparation of aromatic bisimides
AssigneeGeneral Electric Company
InventorsHoward M. Relles, Donald S. Johnson
Life of this patent
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Abstract
Aromatic bisimides can be prepared by effecting reaction under anhydrous conditions between a 3- or 4-nitro-N-substituted phthalimide with an aromatic dihydroxy compound in the presence of a certain class of dipolar aprotic compounds as solvent and solid potassium carbonate and in the further presence of a particulate zeolite adsorbent.
Claims11
The process for making aromatic imides of the general formula ##STR15## which comprises (1) simultaneously effecting reaction under substantially anhydrous conditions between a nitrophthalimide of the general formula ##STR16## with a dihydroxy compound of the general formula
- HO-R-OH
- where R is a member selected from the class consisting of
- a. divalent radicals of the formula ##STR17## ##STR18## and (b) divalent organic radicals of the general formula ##STR19## where X is a member selected from the class consisting of divalent radicals of the formulas ##STR20## --O-- and --X--, where m is 0 or 1, y is a whole number from 1 to 5, and R' is a phenyl radical or an alkyl radical of from 1 to 2 carbon atoms, the said reaction being conducted in a solvent selected from the class consisting of N,N-dimethyl formamide, N,N-dimethyl acetamide, N-methylpyrrolidone, and mixtures of such solvents and in the further presence of a particulate potassium carbonate and a molecular sieve zeolite adsorbent, and (2) isolating the formed aromatic bisimide.
The process for making a bisimide having the formula ##STR21## which comprises (1) effecting reaction between 4-nitro-N-methylphthalimide and bisphenol-A in the presence of particulate potassium carbonate, dimethyl formamide as the solvent, and a molecular sieve zeolite adsorbent, and (2) isolating the formed bisimide.
Dependencies are inferred from the claim text.