Regioselectivity in ketyl radical promoted ring cleavage of configurationally restricted α,α-diketocyclopropanes under SET and PET conditions
作者:Bhim C. Maiti、Saswati Lahiri
DOI:10.1016/s0040-4020(98)00548-1
日期:1998.7
Regioselective bond scission of cyclopropyl ketones 1a-d in singleelectrontransfer (SET) reductive process with tributytin hydride has been found to be controlled by radical stabilizing effect. In the case of 1e and 11 stereoelectronic effect was also operative. Under photoinducedelectrontransfer (PET) condition similar regioselectivity was also observed. A ringexpansion product 16 via intramolecular ketone-cyclopropane