A Facile One-Pot Transformation of Baylis-Hillman Adducts into Unsymmetrical Disubstituted Maleimide and Maleic Anhydride Frameworks: A Facile Synthesis of Himanimide A
Unsymmetrical, disubstitutedmaleimide and maleicanhydrideframeworks have been accessed from Baylis–Hillmanadducts in an operationally simple three‐step (Friedel–Crafts reaction, selective hydrolysis, and cyclization), one‐pot strategy. This strategy has been successfully extended to the synthesis of a representative bioactive compound, himanimide A (see scheme).
synthesized using the chemoselective S N 2′ coupling of phenylmagnesiumbromide with dimethyl 2-(bromomethyl)fumarate, chemoselective allylic substitution of bromide in 3-(bromomethyl)-4-phenylfuran-2,5-dione with phenylmagnesiumbromide and regioselective N-Selectride-induced reduction of 3-benzyl-4-phenylfuran-2,5-dione as the key reactions.