A novel rearrangement leading to methoxycarbonylmethylated silyl enol ethers
作者:Hans-Ulrich Reissig
DOI:10.1016/s0040-4039(00)98693-3
日期:1985.1
Methyl 2-siloxycyclopropanecarboxylates rearrange smoothly and quantitatively to the corresponding silylenolethers (3) by addition of a catalytical amount of iodo trimethylsilane. Scope and limitation of this novelprocess as well as the synthesis of the electron rich diene (10a) are described.
Low temperature equilibration of cyclopropanes by Lewis acid catalysis
作者:Hans-Ulrich Reissig、Ingrid Böhm
DOI:10.1016/s0040-4039(00)81506-3
日期:1983.1
Under the influence of Lewis acids the cis/trans-equilibration of methyl 2-trimethyl-siloxy cyclopropanecarboxylates occurs even at −78°C. It involves the heterolytic cleavage of a CC bond and seems to be governed by steric effects.