title: Reactions of 1,2-Dehydro-o-carborane with Thiophenes. Cycloadditions and an Easy Synthesis of "Benzo-o-carboranes"(1).
abstract: Cycloaddition reactions of 1,2-dehydro-o-carborane with thiophene, 2,5-dimethylthiophene, 2,5-dimethylfuran, [8](2,5)thiophenophane, and [8](2,5)furanophane are investigated. In all cases, except the reaction with the thiophenophane, both 4 + 2 and 2 + 2 cycloadducts are formed, with the 4 + 2 product dominating. The 4 + 2 adducts of the thiophenes are not stable but extrude sulfur under the reaction conditions to give "benzo-o-carboranes".
authors.affiliation: Department of Chemistry, Michigan State University, East Lansing, Michigan 48824.
authors.forename: Lisa
authors.initials: L
authors.lastname: Barnett-Thamattoor
authors.forename: Guo-xiu
authors.lastname: Zheng Gx
authors.forename: Douglas M.
authors.initials: DM
authors.lastname: Ho
authors.forename: Maitland
authors.initials: M
authors.lastname: Jones
authors.forename: James E.
authors.initials: JE
authors.lastname: Jackson