“…Maleamic acids 3 were prepared according to a reported procedure. 3,16 Spectroscopic data of 4a, 4b, 4d, 4f, 4h, 4l, 4o, 4p, 4s, and 4t are in agreement with the reported data. 7,8,15 Synthesis of Isomaleimides from Maleamic Acid: General Procedure Maleamic acid 3 (0.2 mmol) was taken into a 7 mL vial and EtOAc (1 mL, 0.2 M) was added.…”