Efficient Method for the Synthesis of Functionalized Basic Maleimides

A three‐step procedure involving Diels–Alder condensation of maleic anhydride with furane, formation of N ‐substituted imide upon reaction with appropriate diamine, and a final retro Diels–Alder regeneration of the maleic carbon–carbon double bond is proposed for an unequivocal synthesis of N ‐substituted basic maleimides. The novel method is characterized by mild reaction conditions, easy work‐up, high yields, and no need for additional catalysis.