A. Ishii, J. Nakayama, J. Kazami
1991
Citations
0
Influential Citations
44
Citations
Journal
Journal of Organic Chemistry
Abstract
1,3,4,6-Tetra-2-thienylthieno [3,4-c] thiophene (1f) was synthesized from di-2-thenoylmethane after five steps. The cycloaddition reaction of 1f with N-phenylmaleimide yielded a pair of exo (major) and endo (minor) adducts 7 and 8, whose structures were assigned on the basis of the difference in the reactivity toward m-chloroperbenzoic acid. The reaction of 1f with phenylvinyl sulfoxide, dimethyl acetylenedicarboxylate, and di-2-thenoylacetylene gave benzo [c] thiophene derivatives 13, 15 and 16, respectively