A nonconcerted cycloaddition of fused 2-vinylthiophenes with dimethyl acetylenedicarboxylate
A nonconcerted cycloaddition of fused 2-vinylthiophenes with dimethyl acetylenedicarboxylate. Tetrahedron Letters 2004, 45 (10), 2189-2192 DOI: 10.1016/j.tetlet.2004.01.030.