The Reaction of Ketene with Carbon-Carbon ? Bonds. The Case of Moore's Ketene

Article abstract of DOI:10.1021/jo00299a005

Moore's ketene (tert-butylcyanoketene) reacts with strained cyclopropanes (strain energy more than 31 kcal mol^-1) to give oxetane, tetrahydrofuran, or cyclopentanone derivatives.The ketenophiles which react with Moore's ketene are bicyclo<2.1.0>pentane, quadricyclane, and naphthocyclopropane.