title: A New Route to Silyl-substituted Cyclobutenones and Silylketenes.
abstract: 2-Silyl-cyclobutene(di)ones are obtained by an addition/substitution approach on dimethyl squarate using silyl anions. The acetal and in particular the thioacetal derivatives readily undergo electrocyclic ring opening to reactive silyl(vinyl)ketenes.
authors.affiliation: Institut für Organische Chemie, Technische Universität Clausthal, Leibnizstraβe 6, 38678 Clausthal-Zellerfeld, Germany.
authors.forename: Konstantin
authors.initials: K
authors.lastname: Benda
authors.forename: Tanja
authors.initials: T
authors.lastname: Knoth
authors.forename: Rick L
authors.initials: RL
authors.lastname: Danheiser
authors.forename: Ernst
authors.initials: E
authors.lastname: Schaumann