Free radical ring expansion and rearrangement of large carbocyclic rings
作者:Paul Dowd、Soo-Chang Choi
DOI:10.1016/s0040-4039(00)74828-3
日期:1991.1
Free radical initiated ringexpansion of twelve-, thirtheen-, and fourteen-membered carbocyclicrings is described together with a new synthesis of (R)-(−)-muscone.
Zinc- and Indium-Mediated Ring-Expansion Reaction of α-Halomethyl Cyclic β-Keto Esters in Aqueous Alcohol
作者:Masaaki Sugi、Daisuke Sakuma、Hideo Togo
DOI:10.1021/jo030092l
日期:2003.10.1
Radical ring-expansion reaction of various alpha-halomethyl cyclic beta-keto esters and alpha-halomethyl benzocyclic beta-keto esters and chain-extension reaction of alpha-halomethyl beta-keto esters with zinc powder and indium powder in refluxing aqueous alcohol were carried out to generate the corresponding ring-expansion and chain-extension products. As the results indicate, it was found zinc powder