(E)-2-Methoxyethene-1-sulfonyl fluoride as a precursor of acetylene for synthesis of C1/C2 non-functionalized pyrrolo[2,1-a]isoquinoline derivatives

Abstract

A Cu(I)-promoted exclusive synthesis of pyrrolo[2,1-a]isoquinoline derivatives involving (E)-2-methoxyethene-1-sulfonyl fluoride (MESF) and isoquinolinium N-ylides is described. MESF was used as an acetylene substitute for [3+2] cycloaddition and a variety of C₁/C₂ non-functionalized pyrrolo[2,1-a]isoquinoline derivatives were prepared.