@article{1273ada41e8d4d299acc3791006132af,
title = "Synthesis and conformation of 3,10-di(t-butyl)- and 3,10-dichloro-4,9-methanothia[11]annulenes",
abstract = "First two derivatives of 4,9-methanothia[11]annulene, 3,10-di(t-butyl)- and 3,10-dichloro-4,9-methanothia[11]annulenes (4 and 5), were synthesized from the diketosulfide 6. Spectroscopic properties and X-ray crystallographic analyses revealed that 4 exists as an anti-conformer in respect of stereochemical relationship between the methano bridge and the sulfur atom both in solid state and in solution, while 5 exists as a syn-conformer in similarity to the parent of 4,9-methanothia[11]annulene (3).",
keywords = "Annulenes, Conformation, Density functional calculation, Heterocycles, X-ray crystal structures",
author = "Ryuta Miyatake and Shigeyasu Kuroda and Takanori Kajioka and Akihide Taketani and Mitsunori Oda",
note = "Funding Information: This work was supported financially by a Grant-in-Aid Scientific Research (No. 10640513 to S. K. and No. 13640528 to M. O.) from the Ministry of Education, Science, Culture and Sports, Japan. We thank Dr Shengli Zuo and Mr Shinji Furuta at Toyama University for their technical assistance for the preparation of compounds 4 – 6 .",
year = "2002",
month = may,
day = "6",
doi = "10.1016/S0040-4020(02)00353-8",
language = "英語",
volume = "58",
pages = "3647--3654",
journal = "Tetrahedron",
issn = "0040-4020",
publisher = "Elsevier Ltd.",
number = "19",
}