Cobalt carbonyl-catalyzed carbonylation of functionalized aziridines to versatile β-lactam building blocks
作者:Nicola Piens、Kristof Van Hecke、Dieter Vogt、Matthias D'hooghe
DOI:10.1039/c7ob00832e
日期:——
carbonylation of different classes of non-activated aziridines with diverse substitution patterns was investigated. Special attention was devoted to selectivity issues and reaction optimization. This study resulted in the regio- and stereospecific synthesis of 24 novel β-lactam target structures in high yields on a multigram scale. The synthetic potential of the newly obtained azetidin-2-ones was illustrated
LiAlH<sub>4</sub>
-Induced Thia-Aza-Payne Rearrangement of Functionalized 2-(Thiocyanatomethyl)aziridines into 2-(Aminomethyl)thiiranes as an Entry to 5-(Chloromethyl)thiazolidin-2-ones
作者:Jeroen Dolfen、Kristof Van Hecke、Matthias D'hooghe
DOI:10.1002/ejoc.201700549
日期:2017.6.16
Nonactivated 2-(thiocyanatomethyl)aziridines with diverse substitution patterns were deployed as substrates to effect a LiAlH4-promoted thia-aza-Paynerearrangement to provide access to functionalized2-(aminomethyl)thiiranes in good to excellent yields (78–94 %). The developed strategy involved hydride reduction of the thiocyanato moiety followed by intramolecular aziridine ring opening. Subsequent
Synthesis of 3-Methoxyazetidines via an Aziridine to Azetidine Rearrangement and Theoretical Rationalization of the Reaction Mechanism
作者:Sonja Stanković、Saron Catak、Matthias D’hooghe、Hannelore Goossens、Kourosch Abbaspour Tehrani、Piet Bogaert、Michel Waroquier、Veronique Van Speybroeck、Norbert De Kimpe
DOI:10.1021/jo102555r
日期:2011.4.1
borohydride in methanol under reflux through a rare aziridine to azetidine rearrangement. These findings stand in contrast to the known reactivity of the closely related N-alkylidene-(2,3-dibromopropyl)amines, which are easily converted into 2-(bromomethyl)aziridines under the same reaction conditions. A thorough insight into the reactionmechanism was provided by both experimental study and theoretical
Solvent-Controlled Selective Transformation of 2-Bromomethyl-2-methylaziridines to Functionalized Aziridines and Azetidines
作者:Sonja Stanković、Hannelore Goossens、Saron Catak、Meniz Tezcan、Michel Waroquier、Veronique Van Speybroeck、Matthias D’hooghe、Norbert De Kimpe
DOI:10.1021/jo202637a
日期:2012.4.6
The reactivity of 2-bromomethyl-2-methylaziridines toward oxygen, sulfur, and carbon nucleophiles in different solvent systems was investigated. Remarkably, the choice of the solvent has a profound influence on the reaction outcome, enabling the selective formation of either functionalized aziridines in dimethylformamide (through direct bromide displacement) or azetidines in acetonitrile (through rearrangement
作者:Sonja Stanković、Matthias D’hooghe、Kourosch Abbaspour Tehrani、Norbert De Kimpe
DOI:10.1016/j.tetlet.2011.10.097
日期:2012.1
1-t-Butyl- and 1-(4-methylbenzyl)-3-bromo-3-methylazetidines were prepared from the corresponding N-(2,3-dibromo-2-methylpropylidene)alkylamines and their propensity to undergo nucleophilic substitution at the 3-position by different nucleophiles was assessed, providing a convenient access to novel 3-alkoxy-, 3-aryloxy-, 3-hydroxy-, 3-cyano-, 3-carboxy-, 3-(aminomethyl)- and 3-(hydroxymethyl)azetidines. (C) 2011 Elsevier Ltd. All rights reserved.