Aromatic polysulfone compounds and their manufacture

Details Aromatic polysulfone compounds and their manufacture Aromatic polysulfone compounds and their manufacture

1988-12-07

1991-03-12

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528174, 525534, 525537, C08G 7500, C08F28300, C08L 8100

Patent

active

049994158

ABSTRACT:
This invention relates to aromatic polysulfone compounds and their manufacture. More particularly, this invention relates to functional group containing aromatic polysulfones, and their manufacture by metalation with organo-lithium compounds, of halogenated (e.g. brominated or chloromethylated) aromatic polysulfone compounds. The degree of halogenation of the starting material determines the sites that may be metalated, and the degree of metalation determines how many of these sites will be metalated. At least one of the metalated sites may be treated with an electrophile so that the lithium at that site is replaced by a residuum of the electrophile.

REFERENCES:
patent: 4797457 (1989-01-01), Guiver et al.
"The Metalation of Diaryl Sulfones", W. E. Truce and M. F. Amos, Journal of merican Chem. Society, vol. 73, pp. 3013-3017, 1951.
"2-Chloro-3-dimethylamino-6-phenylsulfonylphenyllithium", H. E. Zieger & G. Wittig, Journal Org. Chem., vol. 27, 3270-3273, 1962.
"Reaccion de Intercambio Hidrogeno-Metal Entre 4,4'-Difluordifenil Sulfona Y n-BuLi. I. Efecto Competitivo de los Grupos Fluor Y Sulfona por la Posicion de Metalacion", M. C. Brinon et al., An. Assoc. Quim. Argentina, vol. 69, pp. 70-77, 1981.

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