title: Photochemically promoted transition metal-free cross-coupling of acylsilanes with organoboronic esters.
abstract: Intermolecular carbon-carbon bond formation between acylsilanes and organoboronic esters was achieved by photoirradiation under almost neutral, transition metal-free conditions. In this reaction, siloxycarbenes generated by photoisomerization of acylsilanes reacted with boronic esters to give the formal B-C bond insertion intermediates, which underwent unique rearrangement to afford the cyclic α-alkoxyboronic esters. Acidic treatment of the resulting crude products under air furnished the cross-coupled ketones in good yields.
authors.affiliation: Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
authors.forename: Kazuta
authors.initials: K
authors.lastname: Ito
authors.forename: Hiroto
authors.initials: H
authors.lastname: Tamashima
authors.forename: Nobuharu
authors.initials: N
authors.lastname: Iwasawa
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kusama