A new sequential alkoxy radical fragmentation of δ-hydroxyketones
作者:Alicia Boto、Rosendo Hernández、Ernesto Suárez
DOI:10.1016/s0040-4039(00)77181-4
日期:1994.4
The alkoxy radicals formed by the reaction of steroidal cyclic hydroxyketones (1) and (2) with (diacetoxyiodo)benzene and iodine or mercuric oxide and iodine under oxygen atmosphere and irradiation with visible light undergo a new quintuple sequence beta-fragmentation-peroxidation-radical reduction-radical reduction-radical cyclization-beta-fragmentation reaction before being trapped by an atom of iodine.
Tandem β-Fragmentation−Hydrogen Abstraction Reaction of Alkoxy Radicals in Steroidal Systems
作者:Alicia Boto、Raimundo Freire、Rosendo Hernández、Ernesto Suárez、María S. Rodríguez
DOI:10.1021/jo962252h
日期:1997.5.1
have been prepared in order to test a newtandem beta-fragmentation-hydrogen abstraction reaction. The alkoxy radicals generated by irradiation of these alcohols with visible light in the presence of (diacetoxyiodo)benzene, iodine, and molecular oxygen undergo a beta-fragmentation reaction followed by peroxidation of the C-radical formed. The peroxy radical reacts further with iodine to give an alkoxy