Cascade rearrangement of furylcarbinols with hydroxylamines: practical access to densely functionalized cyclopentane derivatives
作者:Gesine K. Veits、Donald R. Wenz、Leoni I. Palmer、André H. St. Amant、Jason E. Hein、Javier Read de Alaniz
DOI:10.1039/c5ob00944h
日期:——
The aza-Piancatelli rearrangement with hydroxylamines to 4-aminocyclopentenones is described. Subsequent transformations highlight the versatility of the cyclopentene scaffold and the value of the hydroxylamine in this transformation.
commercially available aldehydes (ketones) and benzylic alcohols can be readily arylated to provide a general and scalable access to structurally diverse alcohols (97 examples, >10 gram‐scale). More importantly, convergentpairedelectrolysis, the ideal but challenging electrochemical technology, was employed to transform low‐value alcohols into more useful alcohols. Detailed mechanism study suggests that two
Efficient synthesis of 4-hydroxycyclopentenones: dysprosium(III) triflate catalyzed Piancatelli rearrangement
作者:David Fisher、Leoni I. Palmer、Jonathan E. Cook、Jessica E. Davis、Javier Read de Alaniz
DOI:10.1016/j.tet.2014.03.007
日期:2014.7
4-Hydroxycyclopentenones represent a privileged scaffold in chemical synthesis. A dysprosium(III) trifluoromethanesulfonate catalyzed rearrangement of furylcarbinols to 4-hydroxycyclopentenones via a 4π electrocyclization has been developed. The catalytic Piancatelli rearrangement affords a single trans-diastereomer from both aryl and alkyl substituted furylcarbinols.