The Ireland ester enolate Claisen rearrangement gives rise to Z-trisubstituted alkenes via heteroatom mediated substrate pre-organization prior to rearrangement.
A Chelation-Controlled Ester Enolate Claisen Rearrangement
作者:Marie E. Krafft、Olivier A. Dasse、Sandra Jarrett、Anne Fievre
DOI:10.1021/jo00121a029
日期:1995.8
The Ireland ester enolate Claisen rearrangement gives rise to Z-trisubstituted alkenes due to heteroatom-enforced control over the conformation of the transition state. An oxygen-bearing functional group at the tertiary carbinol center, which can coordinate to the enolate metal via a seven-membered chelated transition state, provides the control element to explain the selectivity. alpha,beta-Disubstituted unsaturated carboxylic acids are also formed with high diastereoselectivity.
Bernard; Colonge, Bulletin de la Societe Chimique de France, 1945, vol. <5>12, p. 357
作者:Bernard、Colonge
DOI:——
日期:——
A ligand assisted Claisen rearrangement
作者:Marie E. Krafft、Sandra Jarrett、Olivier A. Dasse
DOI:10.1016/s0040-4039(00)61392-8
日期:1993.12
The Ireland ester enolate Claisen rearrangement gives rise to Z-trisubstituted alkenes via heteroatom mediated substrate pre-organization prior to rearrangement.