@article{dff5ff564ab54643ab5e7e640ad280bb,
title = "Benzothieno and benzofurano annelated estranes",
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 = "Cyclization, Diene-ynes, Estranes, Fused steroids, Heteroaryl-ene-ynes, Synthesis",
author = "Masataka Watanabe and Shuntaro Mataka and Thies Thiemann",
note = "Funding Information: The authors thank Prof. Dr. I. Mochida and Prof. Dr. S.-H. Yoon of Kyushu University for generous gifts of CNF [CN28-580 °C, HCl treated], and the catalysts 10 wt% Pt on CNF and 20 wt% PtRu on CNF. Ms. Yasuko Tanaka has carried out MS and HRMS (EI and FAB) measurements. Elemental analyses were performed at the Center for Instrumental Analysis, Hakozaki Campus, Kyushu University. Part of this work has been carried out within the framework of a CREST program. Financial support from the Japan Science and Technology Corporation (JST) is gratefully acknowledged.",
year = "2005",
month = dec,
day = "1",
doi = "10.1016/j.steroids.2005.06.001",
language = "English",
volume = "70",
pages = "856--866",
journal = "Steroids",
issn = "0039-128X",
publisher = "Elsevier Inc.",
number = "13",
}