104746-69-2Relevant academic research and scientific papers
Electrochemical intramolecular cyclisation of propargyl bromoethers catalysed by nickel complexes
Dunach, Elisabet,Esteves, Ana Paula,Medeiros, Maria J.,Olivero, Sandra
, p. 633 - 636 (2005)
The electrochemical intramolecular cyclisation of propargyl 2-bromoethers 1-3 in N,N′-dimethylformamide at constant current in a diaphragmless cell has been developed using NiII complexes as electron-transfer mediators. During controlled-current electrolyses of solutions of Ni II complexes in the presence of bromoethers, catalytic reduction of the latter proceeds via one-electron cleavage of the carbon-bromine bond to form a radical intermediate that undergoes cyclisation to afford the cyclic compounds in moderate to good yields. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2005.
INTERCEPTION OF TETRAHEDRAL INTERMEDIATES IN Pd(II)-MEDIATED CYCLOALKENYLATIONS OF OLEFINIC ENOL ETHERS
Kende, Andrew S.,Wustrow, David J.
, p. 5411 - 5414 (2007/10/02)
The tetrahedral intermediate 3 has been intercepted during Pd(II)-cycloalkenylation of olefinic enolsilane 1 (R=SiMe2t-Bu).In a related manner, the allyl and crotyl enol ethers 5-8 give with Pd(OAc)2 acetoxy tetrahydrofurans (9, 12, 14, 16), convertible to butyrolactones or furans; competing Pd(II)-mediated Claisen rearrangement was not observed.The intramolecular Pd(II)-cycloalkenylation of the ketene acetal 17 leads to δ-lactones 18 and 19.
