Photochemical synthesis of a ladder diborole: a new boron-containing conjugate material.
Climbing the ladder: Reductive cyclization of alkynyl haloboranes lead to the bis-benzocycloborabutylidene rather than the expected ladder diborole, despite the former being much less thermodynamically favored. Photochemical conversion to the ladder diborole was, however, quite facile upon irradiation at 254 nm.
Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
Juan F
JF
Araneda
Benedikt
B
Neue
Warren E
WE
Piers
Masood
M
Parvez