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Benzothieno and benzofurano annelated estranes |
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| Authors: | Watanabe Masataka Mataka Shuntaro Thiemann Thies |
| Affiliation: | Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Japan. |
| Abstract: | The preparation of estrone derived benzothieno- and benzofurano fused steroids is described. Keystep is an intramolecular thienyl(/furyl)-ene-yne cyclization of 16-ethynyl-17-heterarylestra-1,3,5(10),16-tetraenes. The cyclization was carried out under Pt as well as under Ru catalysis. |
| Keywords: | Synthesis Estranes Fused steroids Heteroaryl-ene-ynes Diene-ynes Cyclization |
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