Phosphine-Catalyzed γ′-Carbon 1,6-Conjugate Addition of α-Succinimide Substituted Allenoates with <i>Para</i>-Quinone Methides: Synthesis of 4-Diarylmethylated 3,4-Disubstituted Maleimides

Abstract

In this paper, an interesting γ′-carbon 1,6-conjugate addition for phosphine-catalyzed α-succinimide substituted allenoates has been disclosed. A wide array of substrates was found to participate in the reaction, resulting in the production of diverse 4-diarylmethylated 3,4-disubstituted maleimides with satisfactory to outstanding yields. Furthermore, a plausible mechanism for the reaction was proposed by the investigators.

Keywords

• phosphine-catalyzed
• allenoates
• 1,6-conjugate addition
• <i>para</i>-quinone methides