Transposition des bromo-2 benzopropionates d'ethyle, substitues en α par un groupe acetyl ou cyano, en acetyl-2 et cyano-2 benzopropionate d'ethyle。合成这些 d'oxo-3 cyclanecarboxylates d'alkyle a partir de β-cetoesters; 例如,l'iodomethyl-2 oxo-2 cyclopentanecarboxylate d'ethyle 导管 a l'oxo-3 cyclohexcarboxylate d'ethyle
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