title: Unusual condensation of 3-Thia[5](1,1')ferrocenophane-1,5-dione with glyoxal. Formation of [1.1](2,3)thiopheno(1,1')ferrocenophane-1,7-dione.
abstract: When 3-thia [5](1,1')ferrocenophane-1,5-dione 2 was condensed with glyoxal in the presence of sodium ethoxide, a thiophene-2,3-diyl derivative 3 was obtained as a sole product, instead of the expected 2,5-substituted compound 1.
authors.affiliation: Department of Chemistry, Faculty of Science, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan. miyahscc@mbox.nc.kyushu-u.ac.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Miyahara
authors.forename: Emi
authors.initials: E
authors.lastname: Nishimura
authors.forename: Takashi
authors.initials: T
authors.lastname: Sugimura