title: Siloxy(trialkoxy)ethene undergoes regioselective [2+2] cycloaddition to ynones and ynoates en route to functionalized cyclobutenediones.
abstract: Regioselective [2+2] cycloaddition of ynones or ynoates to siloxy(trialkoxy)ethene (KSA) is described. A siloxy group on the KSA directs the perfect regioselectivity, allowing rapid construction of various functionalized cyclobutenedione derivatives.
authors.affiliation: Department of Chemistry, Tokyo Institute of Technology, and SORST, JST Agency, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Iwata
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Hamura
authors.forename: Keisuke
authors.initials: K
authors.lastname: Suzuki
mesh_terms: D003500:Cyclization; D003503:Cyclobutanes / Q000737:chemistry*; D005030:Ethylenes / Q000737:chemistry*; D015394:Molecular Structure; D012833:Siloxanes / Q000737:chemistry*
chemical_list: D003503:Cyclobutanes; D005030:Ethylenes; D012833:Siloxanes; C036216:ethylene