title: Unusual carbamate-directed CH-activation at an annulated ferrocenophane framework.
abstract: The tetrahydroazepine-annulated [3]ferrocenophane carbamate (4) was synthesized by two different linear routes starting from the readily available α-dimethylamino[3]ferrocenophane-ortho-carbaldehyde rac-6. The carbamate directed lithiation of 4 resulted in a selective attack at a (Cp)C-H bond at the higher substituted "lower" [3]ferrocenophane Cp-ring to eventually yield the respective ester (18) after treatment with ClCO(2)Me.
authors.affiliation: Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, D-48149, Münster, Germany.
authors.forename: Tanja
authors.initials: T
authors.lastname: Voss
authors.forename: Gerald
authors.initials: G
authors.lastname: Kehr
authors.forename: Roland
authors.initials: R
authors.lastname: Fröhlich
authors.forename: Gerhard
authors.initials: G
authors.lastname: Erker
mesh_terms: D000475:Alkenes / Q000737:chemistry; D002219:Carbamates / Q000737:chemistry*; D002264:Carboxylic Acids / Q000737:chemistry; D005296:Ferrous Compounds / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D000075163:Metallocenes
chemical_list: D000475:Alkenes; D002219:Carbamates; D002264:Carboxylic Acids; D005296:Ferrous Compounds; D000075163:Metallocenes; D007501:Iron; C004998:ferrocene