A Stereochemical Study of the Isomerization of Cyclopropyl Ethers to Allyl Ethers Catalyzed with Zinc Iodide
作者:Takashi Sugimura、Tohru Futagawa、Atsushi Mori、Ilhyong Ryu、Noboru Sonoda、Akira Tai
DOI:10.1021/jo960448b
日期:1996.1.1
Optically active 1-alkoxybicyclo[4.1.0]heptane was converted using zinc iodide as a catalyst to 2-alkoxymethylidenecyclohexane without loss of optical purity. The mechanism of the isomerization was studied using a stereochemical analysis of the product and deuteriumlabeling experiments. The results indicated that the isomerization takes place through a stepwise mechanism that involves an attack of
Mechanism of isomerization of cyclopropyl ethers with zinc iodide. New synthetic route to optically active allyl alcohols
作者:Takashi Sugimura、Tohru Futagawa、Ilhyong Ryu、Akira Tai
DOI:10.1039/c39920000324
日期:——
Isomerization of cyclopropyl ethers to allyl ethers in the presence of zinc iodide is confirmed to proceed by a 1,2-hydride shift mechanism by stereochemical and deuterium labelling experiments.
Intramolecular hydrogen shift in reduction of β-mercuro ketal. Preparation of optically active sec-tert-1,3-diols
作者:Takashi Sugimura、Shin-ichiro Goto、Kiyoto Koguro、Tohru Futagawa、Shintaro Misaki、Yukio Morimoto、Noritake Yasuoka、Akira Tai
DOI:10.1016/0040-4039(93)85113-b
日期:1993.1
Intramolecular hydrogen shift of β-radical ketal was found in the reduction of opticallyactive β-mercuro ketal. The addition of olefins to this hydrogen transferred radical proceeded regio and diastereo differentiatingly and afforded opticallyactive sec-tert-1,3-diols.