Stereocontrolled synthesis of bicyclic ureas and sulfamides via Pd-catalyzed alkene carboamination reactions
作者:Nicholas R. Babij、Jordan R. Boothe、Grace M. McKenna、Ryan M. Fornwald、John P. Wolfe
DOI:10.1016/j.tet.2019.04.031
日期:2019.8
The synthesis of bicyclic ureas and sulfamides via palladium-catalyzed alkene carboamination reactions between aryl/alkenylhalides/triflates and alkenes bearing pendant cyclic sulfamides and ureas is described. The substrates for these reactions are generated in 3-5 steps from commercially available materials, and products are obtained in good yield with up to >20:1 diastereoselectivity. The stereochemical
Stereocontrolled Synthesis of Bicyclic Sulfamides via Pd-Catalyzed Alkene Carboamination Reactions. Control of 1,3-Asymmetric Induction by Manipulating Mechanistic Pathways
作者:Nicholas R. Babij、Grace M. McKenna、Ryan M. Fornwald、John P. Wolfe
DOI:10.1021/ol5015976
日期:2014.6.20
A new annulation strategy for the synthesis of trans-bicyclic sulfamides is described. The Pd-catalyzed alkene carboamination reactions of 2-allyl and cis-2,5-diallyl pyrrolidinyl sulfamides with aryl and alkenyl triflates afford the fused bicyclic compounds in good yields and with good diastereoselectivity (up to 13:1 dr). Importantly, by employing reaction conditions that favor an anti-aminopalladation
Influence of Catalyst Structure and Reaction Conditions on<i>anti</i>- versus<i>syn</i>-Aminopalladation Pathways in Pd-Catalyzed Alkene Carboamination Reactions of<i>N</i>-Allylsulfamides
作者:Ryan M. Fornwald、Jonathan A. Fritz、John P. Wolfe
DOI:10.1002/chem.201402258
日期:2014.7.7
triflates to afford cyclic sulfamide products is described. In contrast to other known Pd‐catalyzed alkenecarboaminationreactions, these transformations may be selectively induced to occur by way of either anti‐ or syn‐aminopalladation mechanistic pathways by modifying the catalyststructure and reactionconditions.