Synthesis of Some Hexacarboxylic Acid Derivatives of Hexaazatriphenylene.

摘要

As part of our interest in the use of hexaazatriphenylene (HAT ) derivatives for the synthesis of thermooxidativelystable polymers 1, we have been studying the chemistry of hexaazatriphenylene trianhydride (1). In this report, we focus on the synthesis of hexasubstituted derivatives of HAT useful for the preparation of polyimides 2, i.e., all substituents at the carboxylic acid oxidation level. Synthetic methods and product characterizations for the conversions of 1,4,5,8,9,12-hexaazatriphenylene-hexacarboxylic acid to the corresponding triester triacid, triamic acid, triimide, triester triacid chloride, trimethyl triethyl hexaester, trimethyl ester tri(N,N-dimethyl)amide, hexaamide, tri(N,N-dimethyl)amide triacid, tri(N,N-dimethyl)amide triacid chloride, and trisphthalhydrazide derivatives are described. Reprints. (AW)