A method is provided for making thioether-(bisphthalimide)s from an alkali metal hydrogen sulfide and an N-organo substituted halophthalimide or nitrophthalimide.
Sulfur-containing aromatic compositions and methods for their preparation and use
申请人:GENERAL ELECTRIC COMPANY
公开号:EP0126252A1
公开(公告)日:1984-11-28
New alkali metal mercaptides and disulfides have the formula Z1-S-Z2, wherein Z' is an alkali metal or -S-Z2 and Z2 is a phthalic acid derivative moiety, typically a phthalic anhydride or phthalimide moiety. The mercaptides (Z' is an alkali metal) may be prepared by reacting an alkali metal sulfide with a substituted phthalic acid derivative in a molar ratio of at least about 1 : 1. The disulfides (Z' is -S-Z2) may be prepared by mild oxidation of the corresponding alkali metal mercaptides. The alkali metal mercaptides are useful as intermediates in the preparation of thioether phthalic acid derivatives. The disulfides are useful in the preparation of polyimides by reaction with diamines.