Chemistry of Succinylsuccinic Acid Derivatives; VI¹. A Specific Synthesis ofp-Phenylenediamine

Fluorescent Bis(oligophenylylamino)terephthalates

“…The latter step has been reported to be achieved with stoichiometric amounts of bromine. [5] In our hands this oxidation step proceeded quickly in the presence of catalytic amounts of Pd on charcoal with atmospheric oxygen. [6] However, as the mono-enamine can also oxidize to give the aminohydroxyterephthalic acid derivative, careful control of reaction conditions, in particular, the partial pressure of oxygen, was crucial for the success of this reaction.…”

Copper mediated C–H amination with oximes: en route to primary anilines

“…Interestingly, when the aminated products were treated with concentrated HCl at 190 °C, a series of different substituted primary anilines were obtained with complete removal of the amide-oxazoline part ( Table 4 ). 16 In particular, primary anilines containing heterocycles are accessible via this approach, making it a good complement to early reported nondirected C–H aminations. 9 …”

Polymerization of 2,5‐diaminoterephthalic acid‐type monomers for the synthesis of polyamides containing ladder unit

“…Dimethyl ester of 2,5‐bis(octylamino)terephthalic acid was synthesized according to the reported procedure with some modifications (Scheme ) . Treatment of dimethyl succinate ( 8 ) with NaH in DMSO afforded 9 via the Claisen condensation .…”

“…Dimethyl ester of 2,5-bis(octylamino)terephthalic acid was synthesized according to the reported procedure with some modifications (Scheme 4). 24 Treatment of dimethyl succinate (8) with NaH in DMSO afforded 9 via the Claisen condensation. 25 The reaction of 9 with octyl amine afforded amine 10a accompanied by a small amount of oxidized product 11a (4%).…”