54143-12-3Relevant academic research and scientific papers
Difluoroalkylation/C-H Annulation Cascade Reaction Induced by Visible-Light Photoredox Catalysis
Li, Jin,Chen, Jingzhi,Jiao, Wei,Wang, Guoqiang,Li, Ying,Cheng, Xu,Li, Guigen
, p. 9992 - 10001 (2016/10/31)
We report the first example of difluoroalkylation/C-H annulation cascade reactions of cyclopropyl olefins induced by visible-light photoredox catalysis regioselectively affording partially hydrogenated naphthalenes and quinolines with a variety of difluorinated side chains. The alkylation reagent could be extended to monofluoro and trifluoro reagents, nitrile and malonate. The regioselectivity was investigated by means of density functional theory calculations.
Ruthenium-catalyzed tandem enyne-cross metathesis-cyclopropanation: three-component access to vinyl cyclopropanes
Murelli, Ryan P.,Catalán, Silvia,Gannon, Michael P.,Snapper, Marc L.
, p. 5714 - 5717 (2008/12/22)
Substituted vinylcyclopropanes are prepared through a ruthenium-catalyzed, tandem three-component coupling between an olefin, alkyne, and diazoester. Grubbs' 2nd generation (NHC) ruthenium complexes in the presence of ethylene effect a stereoselective enyne-cross metathesis between alkynes and olefins to generate 1,3-substituted dienes. The slow introduction of diazoacetates to this reaction mixture then allows for the regioselective cyclopropanation of the resulting diene. When the olefin reaction partner is just ethylene (i.e., R′ = H), the tandem process is less efficient. In this case, the byproducts provide unique insight into possible catalyst decomposition pathways.
