1H,3H-Thieno[3,4-c]furan-1,3-dione → 5-(2,6-dioxopiperidin-3-yl)-5H-thieno(3,4-c)pyrrole-4,6-dione

Participants

Reaction Steps

1.54 g thieno(3,4-c)furan-1,3-dione and 1.42 g of 3-aminopiperidine-2,6-dione trifluoroacetic acid were dissolved in 15 mL of acetic acid. The reaction mixture was refluxed overnight, cooled, and evaporated to remove the solvent. The residue was dissolved in 20 mL anhydrous THF, and 2 g of CDI, and a catalytic quantity of DMAP were added. The reaction mixture was refluxed for 6 h until a large amount of white solid precipitated. The solid was cooled and filtered to yield 1.9 g of the title compound.

Provenance & Evidence