Ru-Catalyzed Stereoselective Addition of Imides to Alkynes
作者:Lukas J. Goossen、Mathieu Blanchot、Claus Brinkmann、Käthe Goossen、Ralph Karch、Andreas Rivas-Nass
DOI:10.1021/jo061966h
日期:2006.12.1
A catalyst system formed in situ from bis(2-methylallyl)cycloocta- 1,5-dieneruthenium(II) ((cod)Ru[met](2)), a phosphine, and scandium(III) trifluoromethanesulfonate (Sc-(OTf)(3)) was found to efficiently catalyze the anti-Markovnikov addition of imides to terminal alkynes, allowing mild and atom-economic synthesis of enimides. Depending on the phosphine employed, both the (E)- and the (Z)-isomer can be accessed stereoselectively.
Synthesis of Aminocyclobutanes by Iron-Catalyzed [2+2] Cycloaddition
作者:Florian de Nanteuil、Jérôme Waser
DOI:10.1002/anie.201303803
日期:2013.8.19
Fab Four: An iron‐catalyzed [2+2] cycloaddition furnishes aminocyclobutanes with a broad range of substituents in excellent yields and diastereoselectivities. The products can be obtained on a gram scale and can be further converted to β‐peptide derivatives in a few steps. Furthermore, a [4+2] cycloaddition between an aminocyclobutane and an olefin leads to the corresponding cyclohexylamines.